An astronaut in orbit around Earth drops her pen, and it floats gently next to her hand. Why does it not fall to the floor?
A. There is no gravity in space.
B. The net force on the pen is zero.
C. The gravitational pull is very weak at typical altitudes for orbiting spacecraft.
D. Objects in orbit have no mass.
E. All objects in the spacecraft are falling toward Earth at the same rate.
Answer: E
You might also like to view...
Ozone production via automobile emissions ________
a. is usually associated with photochemical smog b. can help restore the ozone being depleted in the outer atmosphere c. is eliminated by appropriate use of catalytic converters d. will provide overall worldwide reduction in skin cancer
The idea in fission-bomb design is to
A) form a supercritical mass from one or more subcritical masses. B) bring neutrons and subcritical uranium together. C) both of these D) neither of these
A 4.0-cm-tall object is placed 50.0 cm from a diverging lens having a focal length of magnitude 25.0 cm. What is the nature and location of the image?
A) a real image, 4.0 cm tall, 20 cm other side of the object B) a virtual image, 4.0 cm tall, 20 cm other side of the object C) a virtual image, 2.0 cm tall, 10 cm other side of the object D) a virtual image, 1.3 cm tall, 16.7 cm same side as the object E) a real image, 1.3 cm tall, 16.7 cm same side as the object
China can benefit from investments in renewable energy sources
What will be an ideal response?