Unlike acceleration and velocity, speed does not need to specify the direction of motion. Speed is a scalar quality.
This question deals with the law of conservation of momentum, which basically says that the total momentum in a system must stay the same, provided there are no outside forces. Since you were given the mass and velocity of the two objects you can find the momentum (p=mv) of each and then add them together to find the total momentum of the system before they collide. This total momentum must be the same after they collide. Since you have the mass and velocity of one of the objects after the collision you can find the its momentum after. Subtract this from the the system total and you will have the momentum of the other object after the collision. Now that you know the momentum of the other object you can find its velocity using p=mv and its mass from before.
Be careful with the velocities. They are vectors, so direction matters. Typically moving to the right is positive (+) and moving to the left is negative (-). It is not clear from your question which direction the objects are moving before and after the collision.
For water, as the temperature goes up the density of the liquid water decreases therefore it becomes less dense so it tends to rise upward. And since the temperature here is higher, heat flows from the higher temperature to the lower so it releases energy to the environment. Therefore, the correct statements are 2, 3 and 5.
Answer:
a. FTh = 30 N
b. Fw = 30 N
c. a = 200 m/s2
Explanation:
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Answer:
I agree with the student that think that moonlight is just reflected sunlight, so we will see the Sun’s absorption line spectrum.
Explanation:
Absorption spectrums occur when a white light is passed through a gas. Or simply a light from a hot source passes through a cooler gas. The moon itself is a reflection of the sun, so when it reflects the light from the sun, absorption spectrum lined can be seen. Note that it is the hot gases like hydrogen, oxygen etc in or around the sun that cause absorption spectrum.
