Bjom's little brother loves to go sledding. Bjorn tries pushing his brother on the sled on many different kinds of surfaces. If Bjorn
pushes once as hard as he can each time across which surface will the sled travel the farthest?
A a cement sidewalk
B. an ice hockey nink
c. a carpeted hallway
a grass lawn
D.

Apulley system is used to lift a 2,000 newton engine up a distance of 3 meters. the operator must apply a force of 250 newtons to the chain of the pulley system to lift the motor. to lift the engine 3 meters, the operator must pull a total of 30 meters of chain through the pulley system. what is the value of di?

Which of the following is the phase that results when the moon is on the opposite side of the earth from the sun? a. quarter moon b. crescent moon c. new moon d. full moon

Ascientific blank must be testable and capable of being proven false?