Answer:
When matter changes from one state to another, it either absorbs energy—as when chocolate melts—or loses energy. For example, if you were to place the melted chocolate in a refrigerator, it would lose energy to the cold air inside the refrigerator. As a result, the liquid chocolate would change to a solid again.
Explanation:
hope it helps u
Which skateboarder has greater momentum?
a) Skateboarder A: mass = 60 kg; velocity = 1.5 m/s
b) Skateboarder B: mass = 50 kg; velocity = 2.0 m/s
Answer:
skateboard b
Explanation:
p=mv
skateboard a
p=(60kg)(1.5m/s)=90kg*m/s
skateboard b
p=(50kg)(2m/s)=100kg*m/s
Skateboarder B has the greater momentum because the momentum of A is 90 kg m/s and the momentum of B is 100 kg m/s so B has the greater momentum.
What is momentum?Momentum is the result of a particle's mass and velocity. Being a vector quantity, momentum possesses both magnitude and direction. According to Isaac Newton's second equation of motion, the force applied on a particle is equal to the time rate of change of momentum. Check out Newton's laws of motion.
According to Newton's second law, if a particle is subjected to a constant force for a specific amount of time, the result of the force and time (referred to as the impulse) is equal to the change in momentum. On the other hand, a particle's momentum represents the length of time needed for a consistent force to bring it to rest.
According to the question,
For Skateboarder A :
momentum = 60 × 1.5
momentum = 90 kg m/s
For Skateboarder B :
momentum = 50 × 2
momentum = 100 kg m/s.
Hence, B has greater momentum than A.
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A block slides down a rough ramp with a 30-degree incline as shown.
A diagram of a block on a 30 degree incline.
Which diagram represents the forces acting on the block?
A free body diagram with three forces: a force vector northeast labeled F Subscript N Baseline, a force vector southeast labeled F Subscript f Baseline, and a force vector south labeled F Subscript g Baseline.
A free body diagram with three forces: a force vector northeast labeled F Subscript N Baseline, a force vector southeast labeled F Subscript f Baseline, and a force vector southwest labeled F Subscript g Baseline that is equal in magnitude but opposite in direction to the vector pointing northeast.
A free body diagram with three forces: a force vector north labeled F Subscript N Baseline, a force vector southeast labeled F Subscript f Baseline, and a force vector south labeled F Subscript g Baseline, which is equal in magnitude but opposite in direction the north vector.
A free body diagram with three forces: a force vector northeast labeled F Subscript N Baseline, a force vector northwest labeled F Subscript f Baseline, and a force vector south labeled F Subscript g Baseline.
Answer: The first one
Explanation: My best guess is in the pic attached. Hope this helps.
Answer:
b
e
Explanation:
The net force acting on a Cessna 172 airplane has a magnitude of 1900 N and points in the positive x direction. If the plane has a mass of 860 kg, what is its acceleration?
Answer: 10.05m/s²
Explanation:
Force acting on the plane has a magnitude of 1900N.
Mass of plane = 860kg
We then calculate the acceleration which will be:
= 1900 / 860
= 2.21 m/s²
Since acceleration due to gravity is equal to 9.8m/s², then the net acceleration will be:
= ✓(2.21² + 9.8²)
= ✓(4.88 + 96.04)
=✓100.92
= 10.05m/s²
HURRRRRRRRRRRYYYYYYYYYYYYYYYYYYYYY
If a substance containing charged ions and electrons can be compressed so that the particles have less space between them, the substance is a
A. gas
B. plasma
C, solid
D. liquid
Mr. Turner is driving through downtown Houston at 35 MPH (15.56 m/s). This is above the posted speed limit and there are cars parked alongside the curb in the lane next to Mr. Turner. Of course, a large delivery truck ahead looks like it is parked and driverless, but the driver's door swings open into the lane ahead of Mr. Turner. Mr. Turner's reaction time is 3/4th's of a second and the stopping distance at his speed is 1.7 meters. The driver exiting the delivery truck is 13.3 meters ahead. Can Mr. Turner stop in time? What is the vehicle's acceleration when the brakes are applied?
How far will the vehicle travel before Mr. Turner engages the brake?
(I need someone to explain this to me)
Answer:
Mr. Turner will not be able to stop in time.
a = - 71.2 m/s²
s₁ = 11.67 m
Explanation:
Since, Mr. Turner is driving at 45.56 m/s and his reaction time for applying brakes is 3/4th of a second. So, the distance covered by car in this time will be:
s₁ = vt
where,
s₁ = distance covered by car before applying brakes = ?
v = speed of car = 15.56 m/s
t = reaction time = 3/4th of second = 0.75 s
Therefore,
s₁ = (15.56 m/s)(0.75 s)
s₁ = 11.67 m
and the distance required for the car to stop after applying brakes is:
s₂ = 1.7 m
So, the total distance traveled by car before stopping will be:
s = s₁ + s₂
s = 11.67 m 1.7 m
s = 13.37 m
since, the driver was 13.3 m ahead.
Therefore, Mr. Turner will not be able to stop in time.
To find the deceleration of Mr. Turner after applying brakes we use 3rd equation of motion:
2as₂ = Vf² - Vi²
where,
a = deceleration = ?
Vf = Final Velocity = 0 m/s
Vi = Initial velocity = 15.56 m/s
Therefore,
2a(1.7 m) = (0 m/s)² - (15.56 m/s)²
a = - (242.1136 m²/s²)/3.4 m
a = - 71.2 m/s²
PLEASE HELP!!! WILL GIVE 30 POINTS!!
Recalling the FITT Principles, decide which principle is used when you increase the number of days per week that you exercise.
Intensity
Frequency
Time
Type
Answer:
I think its frequency
Explanation:
Answer:
its B or A thank me please
This player along with the point guard, are considered the leaders of the team.
basketball
Answer:
Shooting guard I think
Explanation:
Answer:
the center
Explanation:
i had it on my test
What is the definition of pe
What is the definition of Sports? *
what is the difference between Physical Education and sports? *
Summarize your thoughts on how participating in Physical Education and Sports are similar & different. *
A mercury thermometer is used to measure the temperature of boiling water but why do you think the mountainous travel to cold reason use alcohol thermometer
Because mercury freeze in cold temperatures
Newton's first law of motion is also called the law of
pls help
Answer:
looks like law of inertia
Explanation:
Answer:
The focus of Lesson 1 is Newton's first law of motion - sometimes referred to as the law of inertia. Newton's first law of motion is often stated as. An object at rest stays at rest and an object in motion stays in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Answers the questions
1. At what distance did the object start to move ?
Answer:
it started to move a 1 second
Answer:
at one second :p
Explanation:
look at the illustration , what concepts of heat are being shown in this pictures
Answer:
♥ Convection.
♥ Conduction.
♥ Radiation.
♥ ( お力になれて、嬉しいです！) ♥
If Juan upgrades from a sports car to a large truck, what will happen to the
force needed to keep the truck going at the same speed? Use this
sentence frame
Answer:
The force will have to increase
Explanation:
Since Juan has upgraded from a sports car to a large truck, based on Newton's second law of motion, the force needed to keep the truck going at the same speed will have to increase.
According to Newton's second law "the force on an object is equal to the product of its mass and acceleration".
Force = mass x acceleration
A truck has a larger mass compared to a sports car.
By virtue of this, to make sure both automobiles attain the same speed, the force powering them to accelerate must be the same.
Therefore, the force from the engine must increase.
How does energy release from the sun reach Earth? How does the sun's energy interact with Earth's atmosphere and hydrosphere?
help plz soon :((
Answer:
When the Sun's energy moves through space, it reaches Earth's atmosphere and finally the surface. This radiant solar energy warms the atmosphere and becomes heat energy. This heat energy is transferred throughout the planet's systems in three ways: by radiation, conduction, and convection.
Which of the following statements are TRUE, you can select more than one. * IT
(4 Points)
Chemical reactions always involve changes in energy.
Energy must be taken away to break bonds
Forming bonds releases energy
Energy is released in chemical reactions
Answer:
Chemical reactions always involve changes in energy.
Energy is released in chemical reactions
Explanation:
Chemical reactions involves the formation and breaking of bonds by the combination of atoms in a system.
Chemical reactions always involve changes in energy which can be exothermic or endothermic in nature. When bonds are broken energy is always released, bond dissociation is an exothermic process. When bonds are formed, energy is used up and this process is an endothermic one.What is the thermal energy of an object? Question options: the total potential temperature of its particles the total potential energy of its particles the total kinetic energy of its particles the total kinetic and potential energy of its particles
Answer:
the total kinetic and potential energy of its particles
Explanation:
In every object, there are two types of energy which can be found inside them-Kinetic and Potential Energy. For example, a solid object placed on a stationary table has a potential energy due to the vibration of the molecules of the object.
As the object is moved across the table, it has kinetic energy. The combination of both energy is known as thermal energy. An increase in both energy leads to increase in the thermal energy of a given object.
A certain AM radio wave has a frequency of
1.12 x 10^6
Hz. Given that radio waves travel at
2.99 x 10^8
m/s, what is the wavelength of this radio wave? (Round your answer to three significant figures.)
Answer:
267 m
Explanation:
v=λf
v= [tex]2.99*10^8[/tex]m/s
λ=?
f=[tex]1.12*10^6[/tex]Hz
[tex]2.99*10^8=(1.12*10^6)[/tex]λ
λ=267 m
What are some Non-Examples of Seismology
Answer:
Non- examples will include processes that are not involving earthquakes or tectonic plates movements.
Explanation:
Seismology is the scientific study of earthquakes and internal structure of the earth. This study involves geographical distributions , origins, the effects and possible predictions of earthquakes. Seismology study can further include the movement of Earth's tectonic plates.
Example of seismology is geological surveying.
one side of a copper sheet is highly polished and the other side is painted matt black. the copper sheet is very hot and placed in a verticle position. a student places her hands at equal distances from the sheet. explain why her hands are not heated by convection
Answer:
Because radiation does not require material medium for its propagation.
Explanation:
Radiation is one of the types of modes of heat transfer that takes place majorly in gases. Heat energy can be transferred through gases by radiation without heating up the intervening medium. Even, if the available molecules of gases are evacuated, the heat energy would propagate.
Thus, student's hands were not heated by convection since convection is a mode where material medium is required for propagation of heat energy.
Her hands are not heated by convection because radiation does not require material medium for its propagation.
Radiation
It is one of the types of modes of heat transfer that takes place majorly in gases. Heat energy can be transferred through gases by radiation without heating up the intervening medium. Even, if the available molecules of gases are evacuated, the heat energy would propagate.The sun's light and heat cannot reach us by conduction or convection because space is almost completely empty. There is nothing to transfer the energy from the sun to the earth.Thus, student's hands were not heated by convection since convection is a mode where material medium is required for propagation of heat energy.
Learn more:
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Which three arrows indicate a phase change that occurs at 0 degrees.
Explanation:
(1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1÷1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1+1 )
NEED HELP ASAP, WILL GIVE BRAINLIEST
What effect would El Niño most likely have on organisms?
El Niño would cause the extinction of an entire species.
El Niño would cause changes in the genetic makeup of organisms.
El Niño would cause continents to move to different parts of the planet.
El Niño would cause organisms to move in search of food and better conditions.
Answer:
i think the best one is c
Explanation:
what are the 2 factors of kinetic energy?
Answer:
mass and speed
Explanation:
Kinetic energy increases as mass and speed are increased
HELP ME FAST!!!!
a small fish eats plant material. Later that day, a heron dives into the water and eats the small fish.
Which type of organism does the small fish represent in this scenario?
A: parasite
B:predator
C: prey
D: producer
Help meeeeeeeeeeeee ill mark brainlist to people
Answer: question 1 , would be one question 2 , would be 1 joule and number three would be number one and number four would be , power and last one would be, number two
Explanation: sorry if its wrong
A bird is flying at an initial velocity of 5m/s. It flaps its wings harder, causing it to
accelerate forward at 2m/s/s. At this rate, how long would it take for the bird to fly a total
of 25m?
Answer:So first of all you should probably go ask your teacher because he’s the one that feels or she and I think I can help you with this just wait I need her
Explanation:
Oh wait never mind I can’t because you’re nice calling them now but that’s OK my teachers close to me I’m gonna go tell him to come and help me help you
Answer:
7.32 s
Explanation:
2ad = Vf^2 - Vi^2
2(2)(25) = Vf^- (5)^2
Solve for Vf = 8.66 m/s
t=a(Vf-Vi)
t= 2(8.66-5) =7.32 s
Two identical spheres (of equal mass) a distance of 10 meters apart exert a force of gravity of 0.00050 N on each other. What are their masses?
Answer:
The gravitational force between two objects is written as:
F = G*m1*m2/r^2
Where:
G = 6.67*10^(-11) m^3/kg*s
m1 and m2 are the masses of the objects.
r is the distance between the objects.
In this case, we know that:
F = 0.0005 N
r = 10m
and because the two spheres are identical, we have that:
m1 = m2 = M
then we have the equation:
0.0005 N = (6.67*10^(-11) m^3/kg*s)*(M^2/(10m)^2)
0.0005 N*(10m)^2/(6.67*10^(-11) m^3/kg*s) = M^2
√( 0.0005 N*(10m)^2/(6.67*10^(-11) m^3/kg*s) ) = M = 27,379.3 kg
The mass of each sphere is 27,379.3 kg
A runner with a mass of 78.6 kg, moving at a speed of 8.8 m/s, rounds a bend with a radius of 25 m. What is the centripetal force needed to keep this runner on the curve and what supplies this force?
Answer: Does this help???
The centripetal force is required.
The centripetal force is 243.47 N.
m = Mass of runner = 78.6 kg
v = Velocity of runner = 8.8 m/s
r = Radius = 25 m
Centripetal force is given by
[tex]F_c=\dfrac{mv^2}{r}\\\Rightarrow F_c=\dfrac{78.6\times 8.8^2}{25}\\\Rightarrow F_c=243.47\ \text{N}[/tex]
The centripetal force is 243.47 N.
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kinetic energy depends on what two things?
Answer:
It depends on
1 The energy of the body
2 Motion
Explanation:
✌♥️✌♥️
Which characteristic is related to kinetic energy but not potential energy?
O A. An object's shape
O B. An object's speed
O C. An object's mass
O D. An object's height
Will give brainiest to correct answer
Answer:
B
Explanation:
Since
K.E = 1/2 mv^2
P.E = mgh
The wavelength of a wave is 12 cm and its frequency is 120 Hz. What is its speed?
The speed of the wave is 14.4 m/s.
What is speed?Speed is the rate of change of distance.
To calculate the speed of the wave, we apply the formula below.
Formula:
v = λf............. Equation 1Where:
v = speed of the waveλ = wavelength of the wavef = frequency of the wave.From the question,
Given:
λ = 12 cm = 0.12 mf = 120 Hz.Substitute these values into equation 1
v = 0.12(120)v = 14.4 m/sHence, the speed of the wave is 14.4 m/s.
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