Two groups of students were tested to compare their speed working math problems, Each group was given the same problems. One group used calculators and the other group computed without calculators. what is the hypothesis?

You rub a rod of glass with a cotton cloth, then dip the cloth into a Faraday pail like we will be using in lab. Will a charge sensor connected to the pail give a negative reading, or a positive reading or will it read essentially zero?

You are performing an experiment in which you measure the difference in temperature when a glass of liquid is placed in the shade and in direct sunlight. which piece of technology is appropriate for gathering the experimental data you need?

If the current through a resistor is cut in half, how does the power dissipated by the resistor change? (P=0VI=1^ 2 R = V^ 2 R)

A ramp is 1.0 m high and 3.0 m long. What is the IMA of the ramp?

A ball is rolled uphill a distance of 5 m before it slows, stops, and begins to roll back. The ball rolls downhill 9 m before coming to rest against a tree. What is the magnitude of the balls displacement? A. 4 meters B. 9 meters C. 14 meters D.

Which source is most likely an authority on the subject? Dr. Vale, a pediatrician, discusses electrical circuitry on her home-improvement website. Jonah, an amateur cook, teaches his son how to make the best grilled cheese sandwiches.

What methods can be used to break down substances into elements

8. A gas is contained in a horizontal piston-cylinder apparatus at a pressure of 350 kPa and a volume of 0.02 m3. Determine the work done by the piston on the gas if the cylinder volume is increased to 0.15 m3 through heating.

A 75.0 kg person stands on a scale in an elevator. (a) What does the scale read (in N and in kg) when the elevator is at rest?

The hinge at A and cable BDC support beam ABC. Cable BDC passes over the pulley D that is pinned to the ceiling. (Assume that the + x-axis is to the right and the + y-axis is up along the page.