Hardness may be defined as the resistance of a material to scratching.

a. True

b. False

A bar on a hinge starts from rest and rotates with an angular acceleration α = 12 + 5t, where α is in rad/s2 and t is in seconds. Determine the angle in radians through which the bar turns in the first 4.88 s.

Rank the gravitational forces exerted on the Earth by the following objects. (basketball, human being, skyscraper, car) largest to smallest force.

What fundamental belief explains the european exploitation of non-western cultures such as those in the americas and africa?

The capacitance of a parallel-plate capacitor is independent of which quantity?

Within which type of water body does water move the slowest? A.) River B.) Cloud C.) Ocean D.) Groundwater

While playing with her 5 year old cousin, a Physics 135 student pushed him forward on his scooter. She pushes with a force of 50 Newtons for 3.5 seconds. If the boy and the scooter together have a mass of 30 kg, what is their final velocity? a. 2.

3. A 120.0 V generator supplies 3.0 kw of power. How much current ca the generator deliver?

An apple drops from a tree and hits the ground in 1.5s what is its speed just before it hits the ground?

Sound travels slow in cold air. Why does the speed of sound depend on air temperature?

A tow truck pulls a 500 kg car so that the car accelerates 2 m/s2. What is the net force on the car? 250 N 498 N 1000 N 502 N