You are on roller blades on top of a small hill. Your potential energy is equal to 1,000.0 joules. The last time you checked your mass was 60.0 kilograms.
a. What is your weight in newtons?
b. What is the height of the hill?
c. If you start skating down this hill, your potential energy will be converted to kinetic energy. At the
bottom of the hill, your kinetic energy will be equal to your potential energy at the top. What will be
your speed at the bottom of the hill?
Answers
where m is the mass of the person and g is the gravitational acceleration. In this problem, the mass of the person is m=60.0 kg, while the value of g is
b) The gravitational potential energy at the top of the hill is U=1000 J. The potential energy is also given by the product between the weight W and the height of the hill h:
If we rearrange the equation, we can calculate the height of the hill, h:
c) At the bottom of the hill, all the potential energy at the top of the hill has converted into kinetic energy:
where m is the mass and v is the speed. If we rearrange the formula, we can calculate the speed at the bottom of the hill:
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A _______ is a state of matter that has a fixed or definite shape and volume.
A _______ is a state of matter that has a fixed or definite volume but takes the shape of its container.
A ______ is a state of matter that has no definite shape or volume.
The particles of a ____ have less attraction between them than the particles of the same substance in the solid or liquid state.
When matter changes from one form to another we call it a ____________ change.
Melting is a change in state of matter from a _______________ to a_______________.
Freezing is a change in state of matter from a ______________ to a ______________.
Liquid can change to a gas through two processes:
evaporation - which happens at a temperature below the ______________ point, and vaporization - which happens at the substances boiling point.
Condensation is a change in state of matter from ______________ to _______________.
Sublimation is a change in state of matter directly from a ______________ to a _______________ without going through the liquid phase.
The freezing point of a substance is the same temperature as the _________________ point of a substance.
The condensation point of a substance is the same temperature as the _________________ point of a substance.
Answers
1. Water in a solid form is ice. (when it is frozen)
2. Water in a gas form is steam, or water vapor. (when it evaporates)
3. Water in a liquid form is water. (not frozen, not evaporated)
4. A solid is a state of matter that has a fixed or definite shape in volume. (it cannot change its shape)
5. A liquid is a state of matter that has a fixed or definite shape in volume but takes the form of its container. (it can change shape, but is affected by gravity and will spread when given the option)
6. A gas is a state of matter that has no definite shape or volume. (it floats and is too spread out to contain or measure)
7. The particles of a gas have less attraction between them than the particles of the same substance in liquid or gas form. (gas particles are spread out farther, not having as much attraction to other particles)
9. Melting is a change in state of matter from a solid to a liquid. (like when water melts from ice to normal water)
10. Freezing is a change in state of matter from a liquid to a solid. (like when you make ice cubes out of putting water in the freezer)
12. Below the boiling point
13. Condensation is a change in state of matter from a gas to a liquid (like the water that forms drops on the pan lid when you boil water)
14. Sublimation is a change in state of matter from a solid to a gas (like when it's really cold outside, and the snow disappears from the roof without melting and causing puddles)
15. The freezing point of a substance is the same as the melting point of a substance.
16. The condensation point of a substance is the same as the dew point of a substance.
Answer:H20 is water.
1. Water in a solid form is ice. (when it is frozen)
2. Water in a gas form is steam, or water vapor. (when it evaporates)
3. Water in a liquid form is water. (not frozen, not evaporated)
4. A solid is a state of matter that has a fixed or definite shape in volume. (it cannot change its shape)
5. A liquid is a state of matter that has a fixed or definite shape in volume but takes the form of its container. (it can change shape, but is affected by gravity and will spread when given the option)
6. A gas is a state of matter that has no definite shape or volume. (it floats and is too spread out to contain or measure)
7. The particles of a gas have less attraction between them than the particles of the same substance in liquid or gas form. (gas particles are spread out farther, not having as much attraction to other particles)
9. Melting is a change in state of matter from a solid to a liquid. (like when water melts from ice to normal water)
10. Freezing is a change in state of matter from a liquid to a solid. (like when you make ice cubes out of putting water in the freezer)
12. Below the boiling point
13. Condensation is a change in state of matter from a gas to a liquid (like the water that forms drops on the pan lid when you boil water)
14. Sublimation is a change in state of matter from a solid to a gas (like when it's really cold outside, and the snow disappears from the roof without melting and causing puddles)
15. The freezing point of a substance is the same as the melting point of a substance.
16. The condensation point of a substance is the same as the dew point of a substance.
Answers
Frequency = rate of sploosh = 2 per second = 2 Hz.
Period = ( 1/frequency ) = 1/2 second
Speed = (wavelength) x (frequency) = (0.15m) x ( 2/sec) = 0.075 m/s .
B. Give explanations for natural events
C. Make predictions
D. Produce unchanging, absolute answers
Answers
Answers
Answer:
magnitude of force is 1725 N
direction is opposite to the direction of car moving i.e west
Explanation:
Given data
car mass = 1380 kg
speed = 27.0 m/s
time = 8 s
speed = 17 m/s
to find out
magnitude and direction of the net force
solution
we find here first acceleration thats formula is
a = v(initial) - v(final) / time
a =27 - 17 / 8
acceleration = 1.25 m/s
so force is = ma
force is = 1380 ( 1.25)
force = 1725 N
so magnitude of force is 1725 N
and this is here direction is opposite to the direction of car moving i.e west
Final answer:
The net force that leads to the deceleration of the 1380 kg car from 27.0 m/s to 17.0 m/s over 8.00 seconds has a magnitude of 1725 N and is directed towards the west.
Explanation:
To solve for the magnitude and direction of the net force that produces the deceleration in the car, you first need to calculate the acceleration and then use it to find the net force using the formula f = m * a. The acceleration here represents a deceleration because the speed is decreasing.
Acceleration can be found using the formula a = (v_f - v_i) / t. Here, v_i is the initial speed (27.0 m/s), v_f is the final speed (17.0 m/s), and t is the time interval (8.00 s). This gives you a = (17.0 m/s - 27.0 m/s) / 8.00 s = -1.25 m/s^2. The negative sign represents deceleration.
Now, apply this deceleration to the formula for force, f = m * a. Here, m is the mass of the car (1380 kg) and a is the value we computed (-1.25 m/s^2). So, f = 1380 kg * -1.25 m/s^2 = -1725 N. The negative sign indicates that the force is in the direction opposite to the initial motion of the car. Therefore, the magnitude of the net force is 1725 N, and the direction is towards the west or opposite to the car's original path.
Learn more about Net Force Calculation here:
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B. have a different frequency than the resultant wave.
C. be in phase with each other.
D. have a different wavelength than the resultant wave.
Answers
Correct answer choice is:
C. Be in phase with each other.
Explanation:
Components waves mix to produce a resultant with the equivalent wavelength but the amplitude which is bigger than the amplitude of both of the unique component waves, and this results in constructive interference, which states that the interference of two or more waves of identical frequency and phase, constructing in their respective reinforcement and constructing a single amplitude equivalent to the total of the amplitudes of the unique waves.
Answers
A thermogram is a representation of infrared electromagnetic waves better known as heat waves. So the correct answer is infrared electromagnetic waves or infrared waves.
Explanation:
The thermogram is associated with infrared camera creates a picture by changing effulgent heat into a symbol which will be displayed on a monitor (and later printed). The infrared energy emitted from the associated object is directly proportional to its temperature. Thus it can be used for temperatures that are accurately measured by the infrared camera.