Answer:
10. True. vA = - ¼ vB
, pA = - pB
Explanation:
Let us propose the solution of this problem, as the cars are released let us use the conservation of the moment.
Initial before releasing the cars
p₀ = 0
Final after releasing cars
= mA vA + mB vB
p₀ =
0 = mA vA + mB vB
vA = - mB / mA vB
They indicate that mA = 4 mB
vA = - ¼ vB
Let's write the amount of movement for each body
pA = mA vA = 4 mB (- ¼ vB
pA = -mB vB
pB = mB vB
pA = - pB
Let's check the answers
1 False
2 False
3 False
4 false
5 False
6 False
7 False
8 False
9 False
10. True. The speed and amount of movement values are correct
Answer:
B. It has increased the chili's potential energy
Explanation:
When there is an increase in the kinetic energy of a substance, the vibrations of atoms and molecules of the substance increases.
This kinetic energy increases the thermal energy of the substance.
So, when there is a decrease in the thermal energy of a substance, the kinetic energy decreases because the random motion of the molecules or atoms becomes feeble.
If the kinetic energy of the substance decreases, the potential energy of the substance increases.
So, if the chili has cooled after 10 minutes, it has increased the potential energy of the substance.
Answer:
it would make sense because a larger body could produce more body heat.
Answer:
Option D. 23.5 m
Explanation:
From the question given above, the following data were obtained:
Frequency = 200 Hz
Speed of sound in brass = 4700 m/s
Wavelength of sound in brass =?
We can obtain the wavelength of the sound in the brass by using the following formula as illustrated below:
Wave speed = wavelength × frequency
4700 = wavelength × 200
Divide both side by 200
Wavelength = 4700 / 200
Wavelength = 23.5 m
Thus, the wavelength of the sound in the brass is 23.5 m
