1. The force with which earth pulls us.
2. A force that attracts iron and Nickel objects.
3. An instrument used to measure atmospheric pressure.
1. Why is it necessary for the astronauts to wear pressurized suits?
2. What is the effect of altitude on atmospheric pressure?
3. Explain why balloon bursts when too much air is blown into it.
4. Give two examples of contact forces.
please help me
Answers
Answer:
1.magnetic force
2.Barometer.
3.Astronauts must wear spacesuits whenever they leave a spacecraft and are exposed to the environment of space. In space, there is no air to breath and no air pressure. ... Spacesuits are specially designed to protect astronauts from the cold, radiation and low pressure in space. They also provide air to breathe.
4.pressure decreases with increasing altitude. The pressure at any level in the atmosphere may be interpreted as the total weight of the air above a unit area at any elevation. At higher elevations, there are fewer air molecules above a given surface than a similar surface at lower levels.
5. A balloon bursts when too much of the air is pumped into it because the inner pressure of the balloon becomes very high than the outer pressure acting on it. The air exerts pressure inside the ballon and takes it to the point where it can not stretch and it bursts.
6. Examples of contact force: Gravitational force and fractional force.
Explanation:
This information are according to class 8th text