Answer:
Mirages happen when the ground is very hot and the air is cool.
Explanation:
They happen when light passes through two layers of air with different temperatures. The desert sun heats the sand, which in turn heats the air just above it. The hot air bends light rays and reflects the sky.
When you see it from a distance, the different air masses colliding with each other act as a mirror.
All of these things were seen in formal experiments by the 19th century. But some of them are easy to see in your own home. It's obvious that light can reflect - you just have to look in a mirror. Light bounces off the mirror and goes into your eye so you can see yourself. It's also obvious that light can refract: All you have to do is put a spoon in a large glass of water and watch how the spoon appears to bend.
That happens because the light is bending as it moves between air and water. Both of these things can be seen even more clearly in a laboratory using beams of light or lasers.
Explanation:
Assuming no air resistance, the package accelerates at 9.8 m/s² towards the Earth.
Answer:
a. 0 m
Explanation:
Given:
v₀ = 7.35 m/s
a = -9.8 m/s²
t = 1.50 s
Find: Δx
Δx = v₀ t + ½ at²
Δx = (7.35 m/s) (1.50 s) + ½ (-9.8 m/s²) (1.50 s)²
Δx = 0 m
