URGENT!! ILL GIVE
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Alex brings a bag of trail mix to school. He empties the bag and measures the total mass of the trail Then he separates the nuts, chocolate, and raisins into individual piles. He eats the chocolate and then measures the mass of the remaining two piles. He records his data in the table
What was the mass of the chocolate that Alex ate?
Answers
The mass of the chocolate from the table that we can find in the question is 11 grams.
What was the mass of the chocolate that Alex ate?
We can see that the table as it have been shown gives us both the total number of the trail mix that Alex has brought to the school as well as the various individual components of the trail mix that he has. Looking at this over view would be of a lot of help as we are trying to find out now the number of the mass of the chocolate that Alex ate.
We have the following information;
Mass of nuts = 24 grams
Mass of raisins = 10 grams
Mass of chocolate = unknown grams
We can now have;
Total mass = Mass of nuts + Mass of raisins + Mass of chocolate
Mass of chocolate = Total mass - (Mass of nuts + Mass of raisins)
Mass of chocolate = 45 - (10 + 24)
Mass of chocolate = 11 grams
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Related Questions
assuming that the night will remain clear, calm, and unsaturated, the predicted minimum temperature is 32°f. suddenly, the wind speed increases and remains gusty throughout the night. the minimum temperature will most likely be .
Answers
Assuming that the night will remain clear, calm, and unsaturated, the predicted minimum temperature is 32°f. suddenly, the wind speed increases and remains gusty throughout the night. The minimum temperature will most likely be higher than predicted due to mixing.
As wind speed increases, it moves the air molecules at a greater frequency due to collisions, and hence, the overall kinetic energy of the molecules increases making them move at a higher speed.
When the night is calm and clear then the surface of earth will be cooler than usual as the air molecules move at normal speed. However, when the wind speed increases, it draws warmer air from the surrounding which is mixed downward on the earth's surface preventing the temperature from dropping. Therefore, on a such night, the temperature will be slightly warmer than usual.
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kami is walking through the airport with her two-wheeled suitcase. the suitcase handle is tilted 42 ∘∘ from vertical, and kami pulls parallel to the handle with a force of 120 nn. (force is measured in newtons, abbreviated nn.)
Answers
Vertical part of The F Sign theater will be equal to F. Our result is 76.4 degrees. I apologize, 76.4 Newton. This completes the vertical element of the solution.
In this issue, a luggage handle is pushed while inclined 46 degrees from vertical. 110 Newtons of force, parallel to the handle, are applied. Additionally, we must determine the magnitudes of the horizontal and vertical components of the applied force. so make a vertical angle. 46 degree force is additional.
As a result, the angle with the horizontal will be equal to 44 3 degrees, or roughly 93 - 46 degrees. Therefore, the title to 40 40 is the angle with the positive x-axis of the force. Therefore, fx's horizontal component is F.
Cost information 110 Newton times 44 degrees of force. This results in F. X. about 79.1 Newtons. We must determine the vertical component in section B. Because of this, the vertical component F. I will equal the F Sign theater. Our result is 76.4 degrees. I apologize, 76.4 Newton. This completes the vertical element of the solution.
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A merry-go-round moves in a circle at a constant speed. Is the merry-go-round accelerating? Explain your an.
Answers
Since an object moving in a circular motion will experience a change in velocity, a merry-go-round moving in a circle will be accelerating
What is Constant Speed ?Constant speed is also known as uniform speed. The speed of an object is uniform when the distance travel by the object per time taken is steady or constant.
If a merry-go-round moves in a circle at a constant speed, the merry-go-round will be accelerating because the speed may be constant but the velocity is not.
An object moving in a circular motion will experience a constant speed and also change in velocity.
The acceleration experienced by an object moving in a circle is known as centripetal acceleration.
Therefore, a merry-go-round moving in a circle at a constant speed will be accelerating toward to the center.
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What is the major different between the particles in a liquid and a gas of the same substance at the same temperature?
Answers
The particles of liquid are closely packed together than the particles of gas.
What is a liquid?A liquid is a state of matter that contains particles that are loosely packed and that takes the shape of its container.
A gas is a state of matter that contains particles that are randomly placed and has no definite shape.
Temperature is the property of matter that defines how hot or cold a particular state of matter is.
When liquid and gas is being compared, the particles of the liquid is loosely packed together while the particles of gas are randomly placed and which collided freely with the walls of its container.
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According to the Big Bang theory
a. dark matter is changing to ordinary matter throughout the universe.
b. dark energy is pulling the universe into black holes.
c. the universe will someday end because of a "big bang."
d. the universe began with an enormous explosion.
Answers
Answer:
D. the universe began with an enormous explosion.
Explanation:
This theory states that the universe began as a single hot, dense, and small point. It then exploded, expanded, became less dense, and the temperature became cooler.
Hope this helps! :)
Write a journal entry for a person living in the world where the Greenhouse effect was never combated. What is this person dealing with? Include information on the temperature, environment, and sea levels.
Answers
Without the natural greenhouse effect, heat from the Earth's surface would simply escape into space, resulting in an average temperature of about 20 °C.
What happens without the greenhouse effect?Earth would be a frozen wasteland without greenhouse gases. By retaining some of the Earth's heat energy so that it doesn't all escape into space, greenhouse gases keep our planet habitable. The greenhouse effect is a label for this heat-trapping phenomenon. The climate control in your greenhouse needs to be improved because it can help with disease prevention, plant growth stimulation, quality improvement, and even energy savings. The preservation of our planet's habitable temperature depends on "greenhouse gases."
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HELP PLEASE!!! PHYSICS!!!
Answers
The maximum horizontal range the value of θ be 45° then the total time of flight exists 3.7 s.
What is meant by kinematic equation?When an object has either a constant velocity or constant acceleration, kinematic equations can be used to help in problem-solving.
A branch of physics called kinematics, which originated in classical mechanics, defines how points, bodies, and systems of bodies move without taking into account the forces that are responsible for their motion.
Generally from the kinematic equation
v = u - g × t/2
So v exists the velocity at maximum height and the value is v = 0 m/s
substitute the values in the above equation, we get
0 = u - 9.8 × 3.7/2
simplifying the above equation, we get
⇒ u = 18.13 m/s
Here u exists the initial velocity of the dart as it leaves that gun.
Generally the horizontal range of the dart is mathematically represented as
[tex]$R=\frac{u^2 \sin 2 \theta}{g}$$[/tex]
For maximum horizontal range the value of θ = 45°.
So, R max = [tex]$\frac{18.13^2 \sin 2(45)}{9.8} \\[/tex]
⇒ R max =33.54 m
Therefore, the total time of flight is t = 3.7 s.
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a parallel–plate capacitor of capacitance c and distance d between plates is fully charged from a battery of voltage v, and then disconnected. the plates of capacitor are slowly pulled to the half of the initial distance (d/2).
Answers
When plates of capacitor are slowly pulled to the half so, voltage of capacitor is now V/2.
What is the energy of a capacitor?The charge Q and voltage V between the capacitor plates are related to the energy U C U C stored in a capacitor because it is electrostatic potential energy. A charged capacitor stores energy in the electrical field that develops between its plates. The capacitor charges up, expanding the electrical field. Two parallel lines, either flat or curved, should be close but not touching in order for the capacitor symbol to accurately represent how the capacitor is constructed.
What is called capacitance?The capacity of a component or circuit to gather and hold energy in the form of an electrical charge is known as capacitance. Devices that store energy include capacitors, which come in a variety of sizes and shapes.
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a baseball player hits a baseball into the air with an initial vertical velocity of 65 feet per second. the player hits the ball from a height of 3 feet. write an equation that gives the baseball's height as a function of the time (in seconds) after it is hit. h(t)
Answers
Y=h(t)
Y0=3 feet
V0=65 feet
T=t
A=32.17 feet per second squared
H(t)=3+65t+16.085t^2
two oppositely charged but otherwise identical conducting plates of area 2.50 square centimeters are separated by a dielectric 1.80 millimeters thick, with a dielectric constant of k
Answers
A material's relative static permittivity (or static relative permittivity) under specific conditions is a measure of how well it focuses electrostatic lines of flux. It is the ratio of electrical energy stored when a potential is applied to the permittivity of a vacuum. The relative static permittivity equals the relative permittivity calculated at zero frequency. The dielectric constant, relative dielectric constant, and static dielectric constant are other synonyms for relative static permittivity. While these phrases are still widely used, they are unclear and have been rejected by certain standards groups. There are two reasons for the potential uncertainty. depending on the context, relative permittivity
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if you set out to explore the surface of the moon, you would wear a thermally insulated space suit. in such activity, you might expect to generate roughly 4 kj of heat per kilogram of mass per hour. if all this heat were retained by your body, how much would your body temperature increase per hour owing to this rate of heat production? (assume that your heat capacity is roughly that of water) what time limit would you recommend for a moon walk under these conditions?
Answers
Temperature rise hourly = 0.956 degree Celsius
2.3245 hours are the time limit for the process.
How would you define specific heat?The amount of heat needed to raise a substance's temperature by one degree Celsius in one gram is known as specific heat. Calories or joules per gram per degree Celsius are frequently used as the units of specific heat. For instance, water has a specific heat of 1 calorie (4.186 joules) per gram per degree Celsius.
Heat produced per hour per 1kg = 4 KJ
Heat absorbed per kg per hour = temperature rise x specific heat of body
4 = temp rise x 4.184 KJ/kgK
temperature rise per hour = 4/4.184 = 0.956 C
For calculation of time limit
increase of C = ( increase in F) x 5/9
= 4 x 5/9 = 2.22
Now per hour rise = 0.956 C
time required to rise per 2.22 C = ( 2.22 /0.956)
= 2.3245 hours
Hence time limit = 2.3245 hours
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Question 1 of 20:
Select the best answer for the question.
1. Unlike the IQ, your emotional intelligence (EQ)___
A. can be discovered through your academic grades.
B. may be improved over time by becoming more mindful.
C. can only be developed during childhood.
D. is a set value that never changes.
PLEASE HELP!!!!
Answers
Unlike the IQ, your emotional intelligence (EQ) may be improved over time by becoming more mindful
Emotional intelligence is the understanding and usage of one's own emotions in a positive way to relieve their stress. It also helps for effective communication, to overcome challenges, to empathize and to defuse any bad situation.
Option A is the correct for IQ ( Intelligence quotient ). Option C is wrong because EQ can be built in any stage of your life. EQ is basically emotions. So option D is incorrect.
Therefore, Unlike the IQ, your emotional intelligence (EQ) may be improved over time by becoming more mindful
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Use the picture above to explain what is happening with the visible light in terms of: reflection, absorption, refraction and transmission. Use specific
details from the picture in your answer!
Answers
Since the picture is not provided, I have given how reflection, absorption, refraction and transmission of visible light works.
There are electrons present in the atoms and molecules of objects. A visible light wave will have certain frequency. If the frequency of the light wave matches with the frequency that causes the electron to vibrate, the electrons will absorb the energy of light for vibrational motion. During the vibrational motion, the vibrational energy is converted into thermal energy. This is how light is absorbed.
The waves that do not match the frequencies are reflected if the object is opaque and is transmitted if the object is transparent. If the object is has high refractive index, the light bends and comes out the other side, It is called as refraction.
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Which type of material is the best thermal conductor?
A.nonmetal
B.metalloid
C.metal
Answers
A chemical reaction takes place in which energy is released. Arrange the reaction’s characteristics in order from start to finish.
Answers
If energy is released in a chemical reaction, the order of reaction’s characteristics from start to finish are higher energy of reactants → transition state → lower energy of products
When two or more two molecules interact with each other and undergo certain chemical changes, a chemical reaction occurs. Chemical reaction results in changes in the chemical properties of the reactants.
There are two types of chemical reactions involving energy. If energy is absorbed during the reaction it is called as Endothermic reaction. If energy is released during the reaction it is called as Exothermic reaction.
Therefore, the order of reaction’s characteristics from start to finish are
Higher energy of reactants
↓
Transition state
↓
Lower energy of products
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which of these stars has the greatest surface temperature? which of these stars has the greatest surface temperature? a 30msun main-sequence star a supergiant a star a cepheid variable star
Answers
A 30MSUN main-sequence star has the greatest surface temperature.
What is a star's main sequence stage?A star spends the majority of its life in the main sequence. It is incredibly long compared to other phases of a star's "life"; Our Sun formed in around 20 million years, but it will remain a main sequence star for roughly 10 billion years (1 × [tex]10^{10}[/tex] years) before transforming into a red giant.What main-sequence star is the biggest?Despite being the largest star known, R136a1 is not the largest because it only has a radius of around 30 times that of the sun. UY Scuti, a hypergiant with a radius almost 1,700 times greater than the sun, is the biggest star currently known to science.What occurs during the star phase of the main sequence?During the main-sequence stage, stars emit energy in the form of heat and light. Deep inside of them, nuclear fusion reactions produce this energy. Helium is created when reactions between hydrogen nuclei fuse. Stars stay in this stage for almost 90% of their lives.
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an air-filled parallel-plate capacitor with capacitance c0 stores charge q on plates separated by distance d. the potential difference across the plates is δv0 and the energy stored is pec,0. if the capacitor is disconnected from its voltage source and the space between the plates is then filled with a dielectric of constant κ
Answers
The capacitance of parallel plate capacitor with air is given by
C0=\epsilon0A/d
The capacitance of a parallel plate capacitor with a dielectric of dielectric constant k is given by
Cnew=k\epsilon0A/d
Part A.
Cnew/C0=(k\epsilon0A/d)/(\epsilon0A/d)=k=2
So
Cnew/C0=2
Part B.
Since the capacitor is disconnected from the voltage source. So voltage will be constant
So
\DeltaVnew/\DeltaV0=1
Part C.
Energy stored in the capacitor is given by
PEC=(1/2)CV2
So
PEC,new/PEC,0=Cnew/C0=2
The capacitance of a conductor is defined as the ratio of the quantity of electric charge stored on it to the difference in electric potential. There are two types of capacitance that are commonly recognized: self-capacitance and mutual capacitance. 237–238 Any electrically charged object displays self-capacitance, for which the electric potential between the object and the ground is measured. Mutual capacitance is measured between two conductors and is especially significant in the operation of the capacitor, a device built specifically for this purpose as an elementary linear electronic component.
Capacitance is solely determined by the geometry of the capacitor's design, such as the opposing surface area of the plates and the distance between them, as well as the permittivity of the dielectric material between the plates.
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which of the following is a derived Unit (A) kg (B) meter (c) kelvin (D) Newton.
Answers
Answer:
D,Newton
Explanation:
b/c it is derived unit
Answer:
The newton
Explanation:
is drived because of its definition consist of multiplication of three defined base unit and nothing else it's not independently defined
charge q is a test charge used to measure the electrical potential created by source charge q when the test charge is brought in from very far awa and placed a distance of r from the source charge the charges have an eelctric potential energy
Answers
The value of Q so that electric potential at point P becomes zero is -√2q.
What is the test chargeA test charge is a charge that is so little that the region it is positioned in is hardly impacted by it. It is possible to gauge the strength and direction of an electric field using a positive test charge, which is a unit positive charge.
What is the value of Q so that electric potential at point P becomes zero?The value of Q is -√2q.
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a ball of mass 0.140 kg moving with speed of 1.72 m/s hits a wall and bounces back with the same speed in the opposite direction. what is the change in the ball's kinetic energy?
Answers
Answer:
[tex]0\; {\rm J}[/tex].
Explanation:
The speed of an object is a scalar quantity and is independent of the direction in which the object is moving.
The kinetic energy of an object depends only on the mass and speed of this object. If an object of mass [tex]m[/tex] is moving at a speed of [tex]v[/tex], the kinetic energy of this object will be [tex](1/2)\, m\, v^{2}[/tex].
As a result, as long as the speed of the object stays unchanged, changes in the direction of motion of the object will not affect the kinetic energy of the object.
In this question, the speed of this ball was initially [tex]1.72\; {\rm m\cdot s^{-1}}[/tex]. The kinetic energy of this object was initially [tex](1/2)\, (0.140\; {\rm kg})\, (1.72\; {\rm m\cdot s^{-1}})^{2} \approx 0.207\; {\rm J}[/tex].
The speed of this ball stays the same after the ball bounces back from the wall: [tex]1.72\; {\rm m\cdot s^{-1}}\![/tex]. As a result, the kinetic energy of this object would still be [tex](1/2)\, (0.140\; {\rm kg})\, (1.72\; {\rm m\cdot s^{-1}})^{2} \approx 0.207\; {\rm J}[/tex].
As a result, the change in the kinetic energy of this object would be [tex]0.207\; {\rm J} - 0.207\; {\rm J} = 0\; {\rm J}[/tex].
please help will give 5 points to the best brainlist 30 points
1. A plank balance with outside support has a 30 kg child 3 meters left of the fulcrum and a 45 kg child 2 meters RIGHt of the fulcrum what will happen when the outside support is removed?
A. The right side of the plank will sink
B. Range is not enough info
C.The left side of the plank will sink
D.The plank will be balanced
2. A simple plank balance has a 500 gram weight 50 cm right of the fulcrum where should you place a 200 gram weight to balance it
A. 250 cm left of the fulcrum
B. 100cm left of the fulcrum
C.125 cm left of the fulcrum
D. 20 cm left of the fulcrum
3. A simple plank balance is used to weigh a mystery box when the bod is placed 5 marks left of the fulcrum it is balanced by a 10 kg weight placed 4 marks right of the fulcrum
What is the mass of the mystery box?
A. 10 kg
B. 16 kg
C. 12.5 kg
D. 8 kg
Answers
Based on the principle of moments, the correct options are:
1. If the outside support is removed, the plank will be balanced; option D
2. To balance the simple plank balance, place the 200 gram weight 125 cm left of the fulcrum; option C
3. the mass of the mystery box is 8 kg; option D
What is the principle of moments?The principle of moments is the principle that describes the turning effect produced by forces.
The principle of moments states that for a system of balanced forces, the sum of the clockwise moment about a point equals the sum of the anticlockwise moment about the same point.
The formula for calculating moments about a poit is given below:
Moment = force x perpendicular distance from the fulcrumConsidering the given questions:
1. Assuming the fulcrum is the balance point of the plank balance.
Taking left as anticlockwise and right as clockwise motion
Anticlockwise moment = 30 * 3
Anticlockwise moment = 90
Clockwise moment = 45 * 2
Anticlockwise moment = 90
Therefore, the plank balance is balanced.
2. Assuming the fulcrum is the balance point of the plank balance.
Taking left as anticlockwise and right as clockwise motion
Clockwise moment = 500 * 50
Anticlockwise moment = 25000
Anticlockwise moment = 200 * d
Anticlockwise moment = 200d
200d = 25000
d = 125 cm to the left of the fulcrum
3. Assuming the fulcrum is the balance point of the plank balance.
Taking left as anticlockwise and right as clockwise motion
Clockwise moment = 10 * 4
Anticlockwise moment = 40
let the mass be m
Anticlockwise moment = m * 5
Anticlockwise moment = 5m
5m = 40
m = 8 kg
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a rubber boot is at rest on an inclined plane. when the angle of inclination of the plane is increased to 35.8°, the boot begins to slide down the incline. then, when the angle is decreased to 30.2°, the speed of the boot is constant. what are the coefficients of static and kinetic friction between the boot and the incline? static kinetic
Answers
The boot and incline have 0.859 as their static and kinetic friction coefficients.
How to simplify the equations of kinetic and mechanical energy?We start for the first angle where the given angle is 36.5 ° and the acceleration is zero.
The force equations would be given by:
F = m g sin θ
N = m g cos θ
Fr = μs N
Where μ is coefficient of friction (static)
If we make a sum of forces in the direction in which the block moves we will have the sin θ Component and that of the friction force, so
∑ F = 0
F - Fr = 0
F = Fr
mg sin θ = μ N
m g sin θ = μ m g cos θ
solving for the coefficient, then
μ = sin θ / cos θ = tan θ
substitute the value in the above equation, we get
μ = tan (36.5)
μ = 0.740
We apply the same consideration for the angle of 30.5°, then we know that
μk = tan θ
substitute the value of θ, in the above equation, we get
μk = tan (30.5)
μk = 0.859
Therefore, the value coefficients of static and kinetic friction between the boot and the incline is 0.859.
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a rubber boot is at rest on an inclined plane. when the angle of inclination of the plane is increased to 35.8°, the boot begins to slide.
How do you calculate force on an incline?
Inclined plane formulas for a cubic block
Gravitational force: F g = m × g F_g = m \times g Fg=m×g, where m is the mass of object and g is the gravitational constant
When the force of incline is longer the mechanical advantage for an inclined plane is greater than 1, as less force is required to move an object up the slope than if it were lifted straight up. The mechanical advantage increases as the slope of the inclined plane becomes more gradual, requiring less input force.to learn more about force of incline reffer to:
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What is a similar Mid-Ocean Ridge on dry land compared to?
Answers
Answer:
Mid-ocean ridges around the globe are linked by plate tectonic boundaries and the trace of the ridges across the ocean floor appears similar to the seam of a baseball.
Explanation:
The number of _____ in the atom is what determines whether the atom is a potassium atom, a hydrogen atom, or an oxygen atom.
Answers
Protons
Because protons allow you to figure out the atomic number. Since each element has a unique atomic number. You will be able to figure out what atom it is by counting the number of protons.
A car with a mass of 1260 kg is travelling at 38.0 m/s when the driver sees a traffic jam ahead. If the average braking force in modern vehicles is 2010 N, how far will the car go before coming to a stop?
Answers
With the application of third equation of motion, the car go as far as 451.3 meters before coming to a stop
What is Braking Force ?Braking Force is the force applied for an object to decelerate or stop. It is also the product of mass and its deceleration.
Given that a car with a mass of 1260 kg is travelling at 38.0 m/s when the driver sees a traffic jam ahead. If the average braking force in modern vehicles is 2010 N,
The given parameters are;
Mass m = 1260 KgInitial velocity u = 38 m/sForce F = 2010 NAcceleration a = ?Distance s = ?Before we know how far will the car go before coming to a stop, we need to know its deceleration.
F = ma
2010 = 1260a
a = 2010/1260
a = 1.6 m/s²
Now, let us applied third equation of motion
v² = u² - 2as
v = 0 since the car is coming to rest.
0 = 38² - 2 × 1.6 × s
0 = 1444 - 3.2s
3.2s = 1444
s = 1444/3.2
s = 451.25 m
Therefore, the car go as far as 451.3 meters before coming to a stop.
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6) A spring with a spring constant k = 800 N/m has been compressed, and 196 J of
potential energy is stored. What distance from equilibrium has the spring been
compressed?
Answers
Answer:
[tex]0.7\; {\rm m}[/tex].
Explanation:
If spring with spring constant [tex]k[/tex] is compressed by [tex]x[/tex] relative to the equilibrium, the elastic potential energy [tex]E[/tex] stored in that spring will be [tex]E = (1/2)\, k\, x^{2}[/tex].
For the spring in this question, it is given that [tex]E = 196\; {\rm J}[/tex] whereas [tex]k = 800\; {\rm N \cdot m^{-1}}[/tex]. The displacement [tex]x[/tex] needs to be found.
Note that [tex]\begin{aligned}E &= 196\; {\rm J} = 196\; {\rm N \cdot m} \end{aligned}[/tex] (one joule is the work done when a force of [tex]1\; {\rm N}[/tex] is applied over a distance of [tex]1\; {\rm m}[/tex].)
Rearrange the equation [tex]E = (1/2)\, k\, x^{2}[/tex] to find displacement [tex]x[/tex] in terms of potential energy [tex]E[/tex] and spring constant [tex]k[/tex]:
[tex]\begin{aligned} x^{2} = \frac{2\, E}{k}\end{aligned}[/tex].
[tex]\begin{aligned} x &= \sqrt{\frac{2\, E}{k}} \\ &= \sqrt{\frac{2 \times 196\; {\rm N \cdot m}}{800\; {\rm N\cdot m^{-1}}}} \\ &= \sqrt{0.49\; {\rm m^{2}}} \\ &= 0.7\; {\rm m} \end{aligned}[/tex].
In other words, the spring has been compressed by [tex]x = 0.7\; {\rm m}[/tex] from the equilibrium.
reducing the separation of two bodies to one-fourth its original value will cause the gravitational force between them to become times . (select two choices.)
Answers
Reducing the separation of two bodies to one-fourth its original value will cause the gravitational force between them to become stronger times 16.
What will happen if the distance between two bodies grows? Will the gravitational force between them change?The gravitational force between two particles decreases to half its initial value as their distance from one another is twice.What happens to gravity when the mass is cut in half?The gravitational pull between two objects changes inversely with their squared distance and directly with their masses. Therefore, the gravitational force between the two items would decrease to one-fourth of its initial strength when the masses of both objects are halved without affecting their distance.What transpires when two masses are in contact with one another? Suppose one mass is reduced?The force between two items weakens the further apart they are from one another. The force between the objects grows as mass 1 increases. The force between the objects reduces as Mass 2 decreases.To learn more about gravitational force visit:
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If Rico pulls on a 30 kg box of supplies with a force of 200 N towards the nearest firefight and Ace pulls on the box with a force of -56 N in the opposite direction, what is the net force (in Newtons) on the box of supplies?
Answers
Answer:
144 Newtons towards the nearest firefighter
Explanation:
The net force is 200 - 56 = 144N
A fireman d = 48.0 m away from a burning building directs a stream of water from a ground-level fire hose at an angle of i = 24.0° above the horizontal as shown in the figure. If the speed of the stream as it leaves the hose is vi = 40.0 m/s, at what height will the stream of water strike the building?
Answers
The height at which the stream of water strike the building is 12.9 m.
What is the time of motion of the water?
The time of motion of the stream of water is calculated as follows;
X = Vₓt
where;
Vₓ is the horizontal speed of the stream of watert is the time of motion of the stream of waterX is the horizontal distance travelled by the stream of waterSubstitute the given parameters and solve for time of motion of the water,
t = X/Vₓ
t = (48 m) / (40 x cos24)
t = 1.31 seconds
The height reached by the stream of water is calculated as follows;
h = Vyt - ¹/₂gt²
where;
Vy is the initial vertical velocity of the stream of watert is the time of motiong is acceleration due to gravitySubstitute the given parameters and solve for the height reached by the stream of water
h = (40 x sin24)(1.31) - ¹/₂(9.8)(1.31)²
h = 12.9 m
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In 1–2 sentences, explain how you would determine the constant k for a spring.
PLS help! ASAP
Answers
To determine the force constant (k) of a spring, we need to perform an experiment which requires a retort stand and clamp, a spiral spring, a meter rule and different weights.
Force constant of the spring or the spring constant can be defined as the stiffness of the spring.
Also it is the defined as the force require to cause displacement.The setup is arranged as shown in the image attached as Fg.1.
The natural length of the spring is first recorded. Different weights are added to the spring one after the other and the extension is recorded, each time when the different weights are added simultaneously
The weight is now plotted on the vertical axis and the extension is plotted on the horizontal axis. The slope of the graph is the force constant of the spring.
The graph is shown in the image attached as Fig.2
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The spring constant, k, in Hooke's Law has units of Newton per meter since it is a constant for the force applied per unit of length. The spring constant measures how strong and stiff the spring is. Hope this answers the question. Have a nice day.