1. A 12 kg barrel is pulled up by a rope. The barrel accelerates at 1.2 m/s2. Find the force exerted by the rope. Show all your work.

Two bicyclists ride in opposite directions. The speed of the second bicyclist is 5 miles per hour faster than the first. After 2 hours they are 70 miles apart. Find their rates. A. 15 mi/h; 20 mi/h B. 32.5 mi/h; 37.5 mi/h C. 20 mi/h; 25 mi/h

What must a magnet always have?

A car goes round a curve of radius 48m, the road is banked at an angle of 15 with the horizontal, at what maximum speed may the car travel if there is to be low tendency to skid even on very slippery pavement

The density of oxygen is 1.43 x 10 - 3 kg/m3. If a canister of oxygen has a mass of 0.2 kg, find the volume.

What are the seasons like on Jupiter?

22 What will NOT pollute the groundwater? F Motor oil spillage G Compost production H Injected radioactive waste J Lawn fertilizers

What is the oxidation state of a hydrogen atom bound to an iron atom.?

What evidence can you present for the possibility of time travel?

A ball is being rolled by a normal push of 1000N. it is opposed by friction which has a force of 0.3kN and air resistance which has a force of 23N. Calculate the resultant force.

What was the change in internal energy (chemical energy plus thermal energy) of the person pulling the block?