<span>the ratio of the force produced by a machine to the force applied to it, used in assessing the performance of a machine. I would say the answer is D, but i'm not sure. :)</span>
Answer:
DONTKNOW NEED CAREER FILD FIRST TO ANWSER
Explanation:
Answer: option c: It orbits beyond the Earth's atmosphere to avoid scattering of light.
Explanation:
Hubble space telescope orbits Earth and sends images of distant objects. The images formed by Hubble are better than the optical telescopes used on land. This is because the Hubble telescope is a space telescope. Light from the distant objects when reaches the land telescopes transmits through atmosphere, where scattering occurs. Some the light rays bounce back. This is avoided by the space telescope Hubble.
Answer:
False
Explanation:
The depending on what type of pressure is enclosed in a object, the smaller the object the more pressure because that pressure has limited room to escape.
Answer:
d ≈ 320000 km
Explanation:
Echoes occurs as a result of the bouncing back of sound waves as it impinges on an obstacle. Since the echo covers two distances (i.e forth and back) the distance is written as 2d.
Velocity of radio waves is taken as the speed of light = ![3*10^{8}m/s^{2}](https://tex.z-dn.net/?f=3%2A10%5E%7B8%7Dm%2Fs%5E%7B2%7D)
time =2.15s
DISTANCE = VELOCITY *TIME
2d=vt
![d=\frac{vt}{2}](https://tex.z-dn.net/?f=d%3D%5Cfrac%7Bvt%7D%7B2%7D)
![d=\frac{3*10^{8}*2.15}{2}](https://tex.z-dn.net/?f=d%3D%5Cfrac%7B3%2A10%5E%7B8%7D%2A2.15%7D%7B2%7D)
d= 322500000m
Distance to the moon is approximately 320000km