Answer:
400 J
Explanation:
Work is done when a force that is applied to an object moves that object.
The work is calculated by multiplying the force by the amount of movement of an object
W = F * d
here the man has to work against the gravitational field. (against his weight)
F =100 N
Work done = F * d
= 100 * 4
= 400 J
Answer:
Gravity is a constant quantity
Explanation:
Answer:
City A will have a higher temperature overall than City B (D)
Explanation:
If all factors other than elevation are the same for both cities, then City A will have a higher temperature overall than City B. This is because there are fewer air molecules at higher elevations. Fewer air molecules mean less heat is absorbed by the atmosphere, and temperatures are lower. This is why areas high in the mountains are often much cooler than areas down on the plains.
Answer:
A. during the day or night and in any weather conditions.
Explanation:
Ground-based radio telescopes can be used to collect data from distant objects in space during the day or night in any weather condition.
They do not depend or are they affected by weather and they pass well through them.
- Telescopes are devices used to obtain information about distant bodies usually astronomical in nature.
- Optical telescopes use the visible range of light and they are overwhelmed by the sun during the day.
- Bad weather conditions can also diminish the reception of light.
- They work best at night.
- Radio telescopes uses electromagnetic radiations and can work at any time and during any weather.
