To lift a load to roof, you apply 21 n of force to a pulley. the pulley applies 21 n of force to the load. what is the mechanical advantage of the pulley?

Quantity a of an ideal gas is at absolute temperature t, and a second quantity b of the same gas is at absolute temperature 2t. heat is added to each gas, and both gases are allowed to expand isothermally.

The theory that the Earth's crust and part of the upper mantle are broken into sections that move on a fluid layer of the mantle is called ... A. Continental Drift B. Wegener's Theory C. Sea Floor Spreading D. Plate Tectonics

What is the kinetic energy of a 1 kilogram ball is thrown into the air with an initial velocity of 30m/sec?

Which group contains examples of materials that were not part of a living thing

A ball of mass 0.159 kg is dropped from rest from a height of 3.150 m. ( a. what is its momentum at the start and ( b. what is its momentum after falling 3.150 meters?

An impala is an African antelope capable of a remarkable vertical leap. In one recorded leap, a 45 kg impala went into a deep crouch, pushed straight up for 0.21 s, and reached a height of 2.5 m above the ground.

The metric unit of force is the Newton (N), which is kg∙m/s^2. Convert 10 mg∙cm/s^2 to Newtons. Be careful when working with units. A. 1 x 10^-2 N B. 1 x 10^-5 N C. 1 x 10^-6 N D. 1 x 10^-7 N

Which of the following aspects of the environmental movement addresses the public's right to intervene in environmentally damaging activities on private land?

A mine elevator is supported by a single steel cable 0.0125 m in diameter. The total mass of the elevator cage and occupants is 6450 kg. By how much does the cable stretch when the elevator hangs by 362 m of cable? (Neglect the mass of the cable.

What scientific practice is this? 1) collecting data 2) asking a question 3) providing explanations 4) communicating results