Weightlessness is experienced by an astronaut in space. This means that the astronaut's muscles have to be stronger to move his body or lift other objects.

True

False

The universe is believed to have been form from a very dense fireball billions of years ago.

The electric field in a certain region of Earth's atmosphere is directed vertically down. At an altitude of 300 m the field has magnitude 60.0 N/C; at an altitude of 200 m, the magnitude is 100 N/C.

Two tuning forks are played at the same time. One has a frequency of 176 Hz and the other is 178 Hz. How many beats per second are heard?

The record number of boat lifts, including the boat and its ten crew members, was achieved by sami heinonen and juha-matti räsänen of finland in 2000. they lifted a total mass of 653.2 kg approximately 4 in. off the ground a total of 24 times.

What is the innermost layer of the sun's atmosphere called?

How many electrons do most atoms seek to have on their valence shell? Using this information, explain why certain elements are unreactive and why other elements are reactive.

Which of the following statements is good advice to prevent becoming overly emotional? A. There is no way to prevent becoming overly emotional. B.

An ant is on the pendulum bob of a clock. What would be its displacement in one time period?

Every charged particle in the universe is surrounded by its own? A. both an electric and gravitational field B. Gravitational field C. Charged field D. Electric field E. Both and electric and charged field

How does an iron nail become a magnet when it is placed in a strong magnetic field