If Earth's mass decreased to one half its original mass, with no change in radius, then your weight would * 1 point
A decrease to one half your original weight
B increase two times.
C stay the same
D decrease to one quarter your original weight

Centripetal acceleration is caused by *
1 point
A the radius of an object’s circular motion.
B constant change in direction.
C a change in object’s tangential speed.
D a change in object’s linear velocity.

You are a sales representative for a company that makes a new alternate fuel for vehicles. you have prepared a presentation for the environmental engineers to sell your new product. what question do you expect the audience to ask regarding whether the new fuel will cause less damage to the environment? a. do we have to change any parts of the vehicle to use this alternate fuel? b. will the vehicles get better fuel mileage with the alternate fuel? c. how much greenhouse gas does your fuel produce compared with current fuel sources? d. is the alternate fuel more expensive than fossil fuel?

A100-watt light bulb illuminates a solar cell. the electricity from the solar cell operates a water pump that delivers 1 watt of power. what is the efficiency of the system?

Avector of magnitude 2 cannot be added to a vector of magnitude 3 so that the magnitude of the resultant is a. zero b. 1 c. 3 d. 5 e. 7