Answer: During an endothermic chemical process, the temperature of the system typically decreases.
Explanation: Chemical processes can be both exothermic or endothermic, it actually depends on whether heat is released or absorbed during the reaction. In an endothermic reaction, energy is absorbed from the surroundings, mostly in the form of heat, causing the temperature of the system to decrease. This is because the reaction requires energy to break the bonds of the reactants and form new bonds in the products. Examples of endothermic reactions include melting ice, evaporating water, and cooking an egg
To learn more about endothermic process,
https://brainly.in/question/3131321
a 100 kg football player is running toward another player at 15 m/s. how much average force (in n) needs to be applied over 2.0 seconds to bring him to a stop?
An average force of 750 N must be applied over 2.0 seconds to bring the football player to a stop.
Given
The initial velocity of the football player, u = 15 m/s
The final velocity of the football player, v = 0 (since he needs to be brought to a stop)
The time taken to bring the football player to a stop, t = 2.0 s
The mass of the football player, m = 100 kg
Solution
Using the formula for average force, which is:
(final momentum - starting momentum) / time = average force
We can first calculate the initial momentum of the football player, which is:
initial momentum = mass x velocity
= 100 kg x 15 m/s
= 1500 kg m/s
Next, we can calculate the final momentum of the football player, which is:
final momentum = mass x velocity (since he has been brought to a stop)
= 100 kg x 0 m/s
= 0 kg m/s
We can now plug these data into the average force formula:
(final momentum - starting momentum) / time = average force
= (0 kg m/s - 1500 kg m/s) / 2.0 s
= -750 N
The negative sign indicates that the force must be applied in the opposite direction to the motion of the football player, to bring him to a stop. Therefore, an average force of 750 N must be applied over 2.0 seconds to bring the football player to a stop.
Learn more about momentum here:-brainly.com/question/1042017
two shotguns are identical in every respect (including the size of the shell fired) except that one has twice the mass of the other. which gun, if either, will tend to recoil with greater velocity when fired?
The shotgun with twice the mass will tend to recoil with less velocity when fired compared to the identical shotgun with half the mass.
This is because according to Newton's third law of motion, for every action, there is an equal and opposite reaction. When the shotgun is fired, the force of the explosion propels the shell out of the barrel and simultaneously creates a force in the opposite direction, which is the recoil. T
he greater the mass of the shotgun, the more inertia it has and the more resistance it has to the recoil force. Therefore, the shotgun with twice the mass will tend to recoil with less velocity compared to the identical shotgun with half the mass. When comparing two identical shotguns in every respect except mass, the one with twice the mass will tend to recoil with a lower velocity when fired. This is due to the conservation of momentum, where the momentum of the system (gun and shell) must remain constant before and after firing.
Since momentum equals mass multiplied by velocity (p = mv), the shotgun with greater mass will have a lower recoil velocity to maintain constant momentum.
To learn more about Newton's third law of motion click here
brainly.com/question/974124
#SPJ11
Question 25
Perhaps the first indication of the health problems associated with exposure to ionizing radiation were the result of a high incidence of
a. Fetal deaths
b. Cardiovascular disease
c. Skin cancers
d. Benign tumors
Perhaps the first indication of the health problems associated with exposure to ionizing radiation were the result of a high incidence of fetal deaths.
Therefore the answer is a. Fetal deaths.
The first indication of health problems associated with exposure to ionizing radiation was observed in the 1920s and 1930s among female radiation workers who experienced a high incidence of fetal deaths and stillbirths. This phenomenon was later known as the "atomic bomb baby" or the "Hiroshima and Nagasaki effects" after the atomic bombings of Japan during World War II.
The exposure to ionizing radiation can damage DNA and disrupt cell division, leading to genetic mutations and cell death, which can result in miscarriages, fetal malformations, and other reproductive problems.
Other health effects of ionizing radiation exposure include an increased risk of cancer, cardiovascular disease, cataracts, and thyroid disorders.
To know more on ionizing radiation
https://brainly.com/question/9621276
#SPJ4
Question 21
Which is the standard measure for water turbidity?
a. nephelometric turbidity unit
b. siple turbidity unit
c. formazin turbidity unit
d. jackson turbidity unit
The standard measure for water turbidity nephelometric turbidity unit. Option A is the correct answer.
Water turbidity is a measure of the cloudiness or haziness of water caused by suspended particles that scatter and absorb light.
The standard measure for water turbidity is the Nephelometric Turbidity Unit (NTU), which measures the amount of light scattered by particles in the water sample.
The NTU is determined using a nephelometer, which measures the intensity of light scattered at a 90-degree angle to the incident light. The higher the turbidity of the water, the higher the NTU reading.
Learn more about water turbidity at
https://brainly.com/question/28022211
#SPJ4
the apollo astronauts could have performed eatosthenes experiment on the moon. apollo 11 landed on 20 july 1969 in mare tranquillitatis, on the moon's equator. the last lunar mission, apollo 17 on 11 dec 1972, landed at taurus-littrow at latitude 20 due north of the apollo 11 landing site. if the apollo 17 astronauts driven their lunar buggy to the apollo 11 site they would have traveled 606 km, what is the circumference of the moon? a) 1,091 km b) 4,943 km c) 10,908 km d) 40,400 km e) 68,544 km
The need to use the formula for circumference which is C = 2πr, where C is the circumference, π is a constant approximately 3.14, and r is the radius of the moon. First, let's find the distance between the landing sites of Apollo 11 and Apollo 17. We know that they are 606 km apart and that Apollo 17 landed at a latitude of 20 degrees north.
The Using some trigonometry, we can find that the distance between the two landing sites along a line of longitude is approximately 1,165 km. Next, we need to find the radius of the moon. We know that the distance between the two landing sites is about 1/6th of the circumference of the moon since they are both on the equator, so we can set up the equation.1/6 C = 1,165 km Solving for C, we get C = 6 x 1,165 km = 6,990 km Finally, we can use the formula for circumference to find the radius C = 2πr 6,990 km = 2π = 6,990 km / 2π r ≈ 1,109 km So the answer is a 1,091 km, which is the closest option to our calculated radius.
learn more about latitude here.
https://brainly.com/question/14833692
#SPJ11
newton’s third law color by number
When action and reaction forces are applied, the forces cancel out. [green]The action force is always greater than the reaction force. [purple]The reaction force is equal to the action force. [pink] .
What is force ?Force is an influence that can cause an object to change its motion or make it stay still. It is described as a push or pull in a specific direction, and it is measured in Newtons. Force can be applied to objects in contact with each other, such as when two objects are pushing against each other. It can also act over a distance, such as when a magnet attracts or repels another magnet. Forces can cause an object to accelerate, decelerate, or change direction. They can also be used to do work, such as lifting an object or compressing a spring.
To learn more about force
https://brainly.com/question/29506154
#SPJ1
considering these initial conditions, is it possible for the skateboarder to reach a horizontal position of 15 m? if it is not possible, what would be required for the skateboarder to reach a horizontal position of 15 m? explain.
the acceleration of the skateboarder, is the normal reaction force on both the board and skateboarder g is the acceleration due to gravity, mg is the weight of the skateboarder, and is the angle of inclination of the inclined plane. their movement and achieve the desired horizontal position.
Without knowing the specific initial conditions, it is difficult to determine whether it is possible for the skateboarder to reach a horizontal position of 15 m. However, if the initial conditions include factors such as the skateboarder's velocity, angle of inclination, and height, it may be possible to calculate whether the skateboarder can reach a horizontal position of 15 m.If it is not possible for the skateboarder to reach a horizontal position of 15 m with the given initial conditions, additional factors such as increased velocity, a steeper angle of inclination, or a higher starting height may be required to achieve this position. It is also possible that the skateboarder may need to adjust their position or technique to better optimize their movement and achieve the desired horizontal position.
learn more about skateboarder here
https://brainly.com/question/29560661
#SPJ11
How much force must a locomotive exert on a 10040-kg boxcar to make it accelerate forward at 0.460 m/s2?
To calculate the force required to accelerate a boxcar forward at 0.460 m/s², we can use Newton’s second law of motion which states that force is equal to mass times acceleration. The mass of the boxcar is 10040 kg and the acceleration is 0.460 m/s². Therefore, the force required to accelerate the boxcar
The mass of the boxcar is 10040 kg and the acceleration is 0.460 m/s². Therefore, the force required to accelerate the boxcar To calculate the force required, we can use Newton's second law of motion which states that force equals mass times acceleration. In this case, the mass of the boxcar is 10040 kg and the acceleration is 0.460 m/s2.
So, force = mass x acceleration force = 10040 kg x 0.460 m/s2 force = 4614.4 N Therefore, the locomotive must exert a force of 4614.4 N on the boxcar to make it accelerate forward at 0.460 m/s2.
learn more about locomotive here
https://brainly.com/question/2630876
#SPJ11
(332-10(1)) Flat cable assemblies shall be permitted only as branch circuits to supply suitable tap devices for lighting, small power, or small appliance loads.(True/False)
True. According to the National Electrical Code (NEC), flat cable assemblies are permitted as branch circuits to supply suitable tap devices for lighting, small power, or small appliance loads.
Flat cable assemblies are a type of wiring system that consists of multiple conductors arranged in parallel within a flat, flexible insulating material. They are designed to provide efficient and organized connections in electrical circuits.
These assemblies can be utilized in various applications, including lighting circuits, where they distribute power to different light fixtures, and small power circuits, which provide power for devices like computers, printers, and other office equipment. Flat cable assemblies are also used in small appliance circuits, which supply power to household appliances like refrigerators, washing machines, and air conditioners.
In summary, flat cable assemblies are allowed as branch circuits, according to the NEC, for the purpose of supplying power to suitable tap devices in lighting, small power, or small appliance loads. These assemblies offer efficient power distribution and organization within electrical circuits, making them a suitable choice for these applications.
learn more about circuits here
https://brainly.com/question/21505732
#SPJ11
A weight suspended from a spring bobs up and down over a distance of 1 meter in two seconds. Its frequency is
The frequency of the weight suspended from the spring is 0.5 Hz.
To determine the frequency of a weight suspended from a spring that bobs up and down over a distance of 1 meter in two seconds, we need to consider the following terms:
- Distance: This is the total vertical distance covered by the weight, which is 1 meter.
- Time: This is the total time taken for the weight to complete one cycle, which is 2 seconds.
Now, frequency is the number of cycles per second, and can be calculated using the formula:
Frequency (f) = 1 / Time period (T)
In this case, the time period (T) is 2 seconds.
So, the frequency (f) can be calculated as:
f = 1 / 2 = 0.5 Hz
Learn more about frequency:
https://brainly.com/question/254161
#SPJ11
How would i solve this/Find the force applied
(a). The skier slides approximately 9.89 meters along the hill before stopping.
(b). The magnitude of the force stopping the skier is approximately 12.53 N.
(a) Work done on an object is equal to the change in its kinetic energy:
[tex]W_{net} = \Delta K[/tex]
At the bottom of the hill, the skier has a kinetic energy of:
[tex]K_i = (1/2)mv^2 = (1/2)(73 kg)(4.2 m/s)^2 = 1326.18 J[/tex]
The skier has a gravitational potential energy of:
[tex]U_f = mgh = (73 kg)(9.8 m/s^2)[/tex](sin 9°)(x)
The net work done on the skier is equal to change in gravitational potential energy:
[tex]W_{net} = \Delta U = U_f - U_i[/tex]
Solving for x :
x = (K_i - U_f) / (mg sin 9°) = [tex](1326.18 J - (73 kg)(9.8 m/s^2)[/tex](sin 9°)(x)) / ([tex]73 kg[/tex])([tex]9.8 m/s^2[/tex])(sin 9°)
x = 9.89 m
(b) Using trigonometry, we can calculate force:
F_parallel = mg sin 9° =[tex](73 kg)(9.8 m/s^2)[/tex](sin 9°) = 12.53 N
To know more about force, here
brainly.com/question/13191643
#SPJ1
a continuous straight stream of protons passes a given point in space at a rate of 2.5 * 109 protons>s. what magnetic field do they produce 1.8 m from the beam?
Therefore, the magnetic field produced by the proton stream at a distance of 1.8 m from the beam is approximately 3.54 nanotesla (nT).
Assuming the stream of protons is moving at a constant velocity, the magnetic field they produce can be calculated using the Biot-Savart law:
B = μ₀/4π * (q*v)/(r²)
Where:
μ₀ = permeability of free space = 4π x 10⁻⁷ T m/A
q = charge of each proton = 1.602 x 10⁻¹⁹ C
v = velocity of the proton stream = 2.5 x 10⁹ protons/s
r = distance from the beam = 1.8 m
Plugging in the values, we get:
B = (4π x 10⁻⁷ T m/A)/(4π) * (1.602 x 10⁻¹⁹ C * 2.5 x 10⁹ protons/s)/(1.8 m)²
B = 3.54 x 10⁻⁹ T
To know more about magnetic field,
https://brainly.com/question/28335396
#SPJ11
Question 36 Marks: 1 The best sanitary landfill method for an area with rolling terrain is theChoose one answer. a. low-area method b. valley or ravine area method c. trench method d. area or ramp method
The best sanitary landfill method for an area with rolling terrain is the valley or ravine area method. This method involves placing waste in a natural or excavated valley or ravine and covering it with soil daily.
The slope of the valley or ravine helps with drainage, while the natural contours of the terrain provide stability for the landfill. This method is often preferred over the low-area method, which can lead to groundwater contamination, and the trench or area/ramp method, which requires extensive excavation and leveling of the land.
Find out more about the ravine area method.
brainly.com/question/28862484
#SPJ11
A 1300 kg car is stopped at a traffic light. A 3000 kg truck moving at a speed of 8 m/s hits the car from behind. If the cars stick together, how fast will they be moving into the intersection?
Answer:
v = 5.58 m/s
Explanation:
Momentum of the truck = mass of the truck x velocity of the truck
= 3000 kg x 8 m/s
= 24000 kg·m/s
Momentum of the car = mass of the car x velocity of the car
= 1300 kg x 0 m/s
= 0 kg·m/s
Total momentum before = Momentum of the truck + Momentum of the car
= 24000 kg·m/s + 0 kg·m/s
= 24000 kg·m/s
Total mass after = mass of the car + mass of the truck
= 1300 kg + 3000 kg
= 4300 kg
Total momentum before = Total momentum after
24000 kg·m/s = (1300 kg + 3000 kg) x v
24000 kg·m/s = 4300 kg x v
v = 24000 kg·m/s / 4300 kg
v = 5.58 m/s
A 24.0 L tank contains 4.86×10−4kg of helium at 19.0∘C. The molar mass of helium is 4.00 g/mol. How many moles of Helium are in the tank? What is the pressure in the tank, in pascals and atmospheres?
The number of moles of helium in the tank is 1.215×10^{-4} mol, the pressure in the tank is 3.03×10^{5} Pa or 2.99 atm.
What does the ideal gas law entail?According to the ideal gas law, the relationship between pressure and volume for a given amount of gas is precisely proportional to the absolute temperature. According to the ideal gas law, all gases have an identical number of gas molecules at a given temperature, volume, and pressure.
By using the ideal gas law:
PV = nRT
P = pressure in Pa
[tex]V = volume in m^{3}[/tex]
n = number of moles
R = ideal gas constant (8.31 J/(mol*K))
T = temperature in K
We have to Convert temperature of 19.0∘C to Kelvin,
T = 19.0°C + 273.15 = 292.15 K
we have to convert volume of the tank,
[tex]V = 24.0 L = 0.0240 m^{3}[/tex]
we can calculate the number of moles of helium:
n = m/M
[tex]n = 4.86×10^{-4} kg / 4.00 g/mol[/tex]
[tex]n = 1.215×10^{-4} mol[/tex]
Now, we using ideal gas law solve for the pressure:
P = nRT/V
[tex]P = (1.215×10^{-4} mol)(8.31 J/(mol*K))(292.15 K)/(0.0240 m^{3})[/tex]
[tex]P = 3.03×10^{5} Pa[/tex]
By dividing by the usual atmospheric pressure of 101325 Pa, we may convert this pressure to atmospheres:
[tex]P = 3.03×10^{5} Pa / 101325 Pa/atm = 2.99 atm[/tex]
To know more about the ideal gas law visit:
https://brainly.com/question/27870704
#SPJ1
Question 83
X-rays units are generally due for reinspection
a. Every year
b. Every 2 to 3 years
c. Every 5 years
d. Every 6 years
X-ray units are generally due for reinspection every 2 to 3 years. The correct option is b.
This is because X-ray equipment is subject to wear and tear over time, and regular inspections help to ensure that it is functioning properly and producing accurate results.
During the inspection process, a qualified technician will check various components of the X-ray unit, including the X-ray tube, high-voltage generator, and collimator. They will also test the accuracy of the equipment and ensure that it is in compliance with all relevant regulations and guidelines.
By following a regular inspection schedule, healthcare facilities can help to minimize the risk of equipment failure and maintain the quality of their diagnostic services.
For more such questions on X-ray units, click on:
https://brainly.com/question/23064627
#SPJ11
a train of mass 95170 kg is traveling along a straight, level track at 26.8 m/s. suddenly the engineer sees a truck stalled on the tracks 184 m ahead. if the maximum possible braking force has magnitude 80.0 kn, how much distance will the train travel before coming to rest?
The train will travel approximately 429.2 meters before coming to rest.
Use the following terms and equations:
1. Mass (m) = 95170 kg
2. Initial velocity (v₀) = 26.8 m/s
3. Maximum braking force (F) = 80.0 kN = 80000 N
4. Distance before coming to rest (d)
First, we need to find the deceleration (a) using Newton's second law: F = ma. Rearranging the equation, we get a = F/m:
a = 80000 N / 95170 kg ≈ -0.840 m/s² (negative sign indicates deceleration)
Next, we'll use the following equation of motion to find the distance (d) traveled before coming to rest: v² = v₀² + 2ad. Since the final velocity (v) will be 0 when the train comes to rest, we can rearrange the equation to solve for d:
d = (v² - v₀²) / 2a
d = (0 - (26.8 m/s)²) / (2 * -0.840 m/s²)
d ≈ 429.2 m
To learn more about Newton's second law click here
brainly.com/question/13447525
#SPJ11
many terms from physics are badly misused in everyday language. in both cases, explain the errors involved. (a) a strong person is called powerful. what is wrong with this use of power? (b) when a worker carries a bag of concrete along a level construction site, people say he did a lot of work. did he?
(a) The term "powerful" is often misused in everyday language to describe a person who is physically strong.
However, in physics, power is defined as the rate at which work is done, or the amount of energy transferred per unit time. Therefore, a person's physical strength does not necessarily correlate with their power. The correct use of power would refer to the rate at which a person can perform work or transfer energy.
(b) When people say that a worker carrying a bag of concrete did a lot of work, they are using the term "work" incorrectly. In physics, work is defined as the product of the force applied to an object and the displacement of the object in the direction of the force.
In this case, if the worker is carrying the bag of concrete along a level surface without any vertical displacement, then no work is actually being done. Instead, the worker is simply expending energy to move the weight of the bag from one location to another.
Therefore, the correct use of the term would be to say that the worker exerted a lot of effort or energy, but not necessarily that they did a lot of work.
To learn more about work is done click here
brainly.com/question/31428590
#SPJ11
Question 53 Marks: 1 The recommended distance from the bottom of the trench to the ground water table or rock is 62 inches.Choose one answer. a. True b. False
The above statement is True. The recommended distance from the bottom of the trench to the groundwater table or rock is indeed 62 inches. This distance helps ensure proper wastewater treatment and prevents contamination of groundwater resources.
Groundwater table The water table is an underground boundary between the soil surface and the area where groundwater saturates spaces between sediments and cracks in the rock. Water pressure and atmospheric pressure are equal at this boundary
Groundwater, which is in aquifers below the surface of the Earth, is one of the Nation's most important natural resources. Groundwater is the source of about 37 percent of the water that county and city water departments supply to households and businesses (public supply).
Learn more about the groundwater here:brainly.com/question/14241380
#SPJ11
You are pedaling a bicycle at 9.8 m/s. The radius of the wheels of the bicycle is 51.9 I'm. The angular velocity of rotation of the wheels is?
The angular velocity of rotation of the wheels is 18.88 rad/s if you are pedaling a bicycle at 9.8 m/s. The radius of the wheels of the bicycle is 51.9 I'm.
Angular velocityRotational motion and rectilinear motion go hand in hand. These are all derivations of Newton's rules of Motion, which are the fundamental rules of motion. The linear velocity has a value of 9.8 m/s. The equation is used to translate it into angular velocity.Where v is the linear velocity in m/s and r is the radiusThe angular velocity is expressed in rad/s, and r is the wheel's radius in meters.0.519 m is equal to 51.9 cm, where r is expressed. Given that later on we'll employ velocity in m/s, we make sure to maintain consistency in the units.9.8 m/s x 0.519 m is the formula for v=r. =18.88 rad/sFor more information on angular velocity kindly visit to
https://brainly.com/question/29557272
#SPJ1
2. the fundamental frequency of an open-open pipe is 594 hz (in air). a) what is the length of the pipe?
The length of an open-open pipe with a 594 Hz fundamental frequency is roughly 0.35 metres.
The formula f = (n/2L)*v, where f is the frequency, n is the harmonic number (n=1 for the fundamental frequency), L is the length of the pipe, and v is the speed of sound in air (roughly 343 m/s at room temperature), determines the fundamental frequency of an open-open pipe (a pipe open at both ends). L = (n/2) * v/f is the result of rearrangement of the equation to solve for L. When the given values are substituted, we obtain L = (1/2) * 343/594 = 0.35 metres. The pipe is roughly 0.35 metres long as a result.
learn more about fundamental frequency here:
https://brainly.com/question/29264927
#SPJ4
samuel ran out of the front door of his house, around the block, and back in the front door, covering a total distance of 300 meters. his entire trip took 3 minutes. what was his average velocity in meters per minute?
Samuel's average velocity is 300 meters / 3 minutes = 100 meters per minute.
To find Samuel's average velocity in meters per minute, we need to use the formula:
Average velocity = total distance ÷ total time
We are given that Samuel covered a total distance of 300 meters and his entire trip took 3 minutes. So we can plug these values into the formula:
Average velocity = 300 meters ÷ 3 minutes
Average velocity = 100 meters per minute
Therefore, Samuel's average velocity in meters per minute was 100.
Learn more about velocity here: https://brainly.com/question/17127206
#SPJ11
compared with the frequency of illuminating light on a sheet of transparent plastic, the frequency of light that is transmitted
The frequency of light that is transmitted through a sheet of transparent plastic is the same as the frequency of illuminating light. Transparent materials, like plastic, do not absorb light and therefore the frequency of light that passes through them remains unchanged.
What is transparent?Transparency is a concept or value of being open and honest with others. It is the practice of being open, honest, and accountable with oneself and with others. Transparency involves communication between individuals and organizations in a way that is easily understood, accessible, and open to public scrutiny. Transparency is a key component of good governance, as it allows for public scrutiny and accountability, and encourages public participation in decision-making. Transparency also fosters trust in the government and promotes economic growth and development.
To learn more about transparent
https://brainly.com/question/31422489
#SPJ4
the height h, in meters, of an object at time t is given by . what is the height of the object at the instant when it reaches its maximum positive velocity?
The height h in meters of an object varies with time 't' in seconds as h = 10t - 5t2. Then the maximum (in m) height attained by the object is 5 meter. the height of the object at the instant when it reaches its maximum positive velocity is 70 meters.
The object at the instant when it reaches its maximum positive velocity, we need to first find the velocity function. We can do this by taking the derivative of the height function v t 5t^2 - 20t + 15Now, to find the maximum positive velocity, we need to find the vertex of the parabola that represents the velocity function. We can do this by finding the t-value that corresponds to the vertex t b2a 20 2 5 2So, the maximum positive velocity occurs at t = 2 seconds, and is given by v 2 5 2 2 20 2 + 15 5 m s Finally, to find the height of the object at the instant when it reaches its maximum positive velocity, we can substitute t = 2 into the height function h 2 5 2 3 10 2 2 15 2 + 10 70 meters Therefore, the height of the object at the instant when it reaches its maximum positive velocity is 70 meters.
learn more about velocity here
https://brainly.com/question/13474612
#SPJ11
Why does the quantity of the water in a beaker not matter but the quantity in a polystyrene cup does?
(PLS HELP ILL MARK U BRAINLIEST)
The quantity of water in a beaker or a polystyrene cup does matter, but the reason why it matters is different for each container.
Why does the quantity of water for each container matter?In a beaker, the quantity of water does not affect the temperature of the water significantly because glass is a good conductor of heat, meaning that the heat from the water is evenly distributed throughout the beaker. As a result, the temperature of the water remains relatively stable regardless of the quantity of water in the beaker.
On the other hand, in a polystyrene cup, the quantity of water does matter because polystyrene is a poor conductor of heat, meaning that the heat from the water is not evenly distributed throughout the cup. If there is a small quantity of water in the cup, the heat from the water is concentrated in a small area, causing the temperature to increase rapidly.
This can cause the cup to melt or deform. If there is a large quantity of water in the cup, the heat is distributed over a larger area, reducing the temperature increase.
Learn about polystyrene cup here https://brainly.com/question/6825901
#SPJ1
An astronaut would feel ________ as he or she crossed the event horizon of a stellar-mass black hole.incredibly strong tidal forcesintense heatinglighternothing
An astronaut would feel incredibly strong tidal forces as he or she crossed the event horizon of a stellar-mass black hole.
The event horizon is the point of no return around a black hole, where the gravitational pull is so strong that nothing, not even light, can escape it.
As the astronaut approaches the event horizon, the gravitational pull on different parts of his or her body becomes increasingly strong, causing a phenomenon called tidal forces.
These tidal forces would be incredibly strong near a black hole, and they would stretch the astronaut's body into a long, thin shape.
The difference in gravitational pull between the astronaut's head and feet would be so extreme that it would likely result in the astronaut being torn apart, a process known as spaghettification.
In addition to the tidal forces, the intense gravitational field near a black hole can also cause intense heating due to the friction and compression of gas and dust around the black hole.
To know more about tidal forces :
https://brainly.com/question/15155368
#SPJ11
exercise 20.6 examining the properties of stars using the hertzsprung-russell (h-r) diagram part 1.a. plot the location of the sun on the h-r diagram. absolute magnitude 5 4.8 temperature > 5,800 k what spectral class is our sun?
The Sun has an absolute magnitude of 4.8 and a temperature of around 5,800 K. When you plot the Sun's location on the H-R diagram based on these values, you'll find that it falls under the spectral class G.
The Sun is specifically classified as a G2V star, where 'G' represents its temperature range and color (yellow), '2' indicates its position within the G class, and 'V' designates its luminosity class (dwarf).
So, our Sun belongs to the G spectral class on the H-R diagram. In Exercise 20.6, we are asked to plot the location of the sun on the Hertzsprung-Russell (H-R) diagram and determine its spectral class.
The H-R diagram is a plot of a star's magnitude (brightness) versus its temperature. The absolute magnitude of the sun is 5 and its temperature is greater than 5,800 K, which places it in the upper-left corner of the H-R diagram.
To determine the sun's spectral class, we can use the information from its temperature and magnitude. The sun is a G-type star, which means it has a surface temperature between 5,000-6,000 K and a yellowish color.
The spectral class of a star is determined by its spectral lines, which are produced by the absorption of light by elements in the star's atmosphere. In conclusion, the sun's location on the H-R diagram indicates its magnitude and temperature, and its spectral class is G.
To know more about light click here
brainly.com/question/9695421
#SPJ11
If a stone has 390 J of energy and is moving with a speed of 12m/s, what is the mass of the stone?
Answer: 5.42 kg
Explanation:
The formula for kinetic energy is:
KE = 1/2 * m * v^2
where KE is the kinetic energy, m is the mass of the object, and v is the velocity of the object.
We are given the kinetic energy (KE) and velocity (v), so we can rearrange the formula to solve for the mass (m):
m = 2 * KE / v^2
Substituting the given values, we get:
m = 2 * 390 J / (12 m/s)^2
m = 2 * 390 J / 144 m^2/s^2
m = 5.42 kg (rounded to two decimal places)
Therefore, the mass of the stone is approximately 5.42 kg.
rocky uses a frictionless pulley system to lift an engine up 2 feet while removing it from a car. rochelle has no pulley system, but asks 3 friends to help her lift an identical engine up 2 feet to remove it from another car. who applied more total force in lifting the engine and why?
In this scenario, Rocky would have applied less total force to lift the engine than Rochelle and her three friends. This is because the frictionless pulley system that Rocky used would have made the lifting process easier and more efficient, requiring less force overall.
On the other hand, Rochelle and her friends would have had to rely on their own strength to lift the engine without the aid of a pulley system. This means that they would have had to exert more total force to lift the engine the same distance as Rocky did. It's important to note that even though Rocky used a pulley system, the force required to lift the engine would have been the same as if they lifted it without the system. The pulley system only makes the process easier by distributing the weight more evenly and reducing the amount of effort needed from each individual. However, in this case, Rocky still applied less total force than Rochelle and her friends due to the use of the pulley system.
For more information on pulley system see:
https://brainly.com/question/13736362
#SPJ11
a 35 kg boy is on a swing at a park. the swing is supported by 2 chains, each 2.96 m long. the tension on each chain is 352n when the boy swings past the lowest point. what is the linear speed of the boy at the lowest point on the swing?
3.94 m/s is the linear speed of the boy at the lowest point on the swing and a 35 kg boy is on a swing at a park. the swing is supported by 2 chains, each 2.96 m long.
To find the linear speed of the boy at the lowest point on the swing, we can use the formula:
v = √(gL(1-cosθ))
where v is the linear speed, g is the acceleration due to gravity (9.8 m/s²), L is the length of the swing (2.96 m), and θ is the angle between the swing and the vertical.
At the lowest point of the swing, the tension on each chain is equal to the weight of the boy, which is:
T = mg = 35 kg x 9.8 m/s² = 343 N
So the tension on each chain is slightly less than 352 N, but we can use this value as an approximation.
The tension on each chain provides the centripetal force that keeps the boy moving in a circular path. The tension is given by
T = mv²/L
where m is the mass of the boy and v is his velocity at the lowest point.
Solving for v, we get:
v = √(TL/m) = √(352 N x 2.96 m / 35 kg) ≈ 3.94 m/s
So the linear speed of the boy at the lowest point on the swing is approximately 3.94 m/s.
Learn more about acceleration here
https://brainly.com/question/30660316
#SPJ11