True or false Scientific endeavor is driven by both simple curiosity as well as societal demands

If she wants to bike 220 km, how long (in hours) must she ride? a cyclist rides at an average speed of 25 miles per hour.

What are the two main forces in a star

A 4.2-m-diameter merry-go-round is rotating freely with an angular velocity of 0.80 rad? s. Its total moment of inertia is 1360 kg? m2. Four people standing on the ground, each of mass 65 kg, suddenly step onto the edge of the merry-go-round.

What kind of chemical reaction does the chemical equation sodium plus chlorine sodium chloride represent

Any external force that acts against movement is called A. gravity B. efficiency C. resistance D. momentum

Why does alternating current change direction 50 to 60 times per second?

Tony uses the device shown in the diagram to model how an electromagnet is used in his uncle's scrap metal yard.

A flight attendant pulls a 60.0 N flight bag a distance of 239.0 m along a level airport floor at a constant speed. A 21.0 N force is exerted on the bag at an angle of 66.0 degrees above the horizontal. How much work is done on the flight bag?

A girl throws a rock horizontally, with a velocity of 10 m/s, from a bridge. It falls 20 m to the water below. How far does the rock travel horizontally before striking the water?

This is a machine consisting of two wheels of different sizes that rotate together. It is a modified lever.