Which Greek first proposed that the sun was the center of the universe?

Who invented the cellphone

What would it mean if neither the red or blue litmus paper changes colors?

Air at 257°C and 400 kPa is contained in a piston cylinder device. The air expands adiabatically until the pressure is 100 kPa. Determine the mass of air needed to produce maximum work of 1000 kJ.

Can a body possess velocity at the same time in horizontal and vertical directions?

A tandem (two-person) bicycle team must overcome a force of 165 Newtons to maintain a speed of 9.00 m/s. Find the power required per rider, assuming that each contributes equally.

The power of a 1.5-volt alkaline cell varies with the number of hours of operation. A brand new D-cell can deliver as much as 13 A through a copper wire connected between terminals. Determine the power of a brand new D-cell.

You measure a watch's hour and minute hands to be 7.4 mm and 12.1 mm long, respectively. Part A In one day, by how much does the distance traveled by the tip of the minute hand exceed the distance traveled by the tip of the hour hand?

Describe the possible long term impact of a catastrophic event

Calculate the mass defect of the helium nucleus 42He. The mass of neutral 42He is given by MHe=4.002603u.

A transparent film laminated to a fabric is identified in the study material as a. stretch fabric. b. PVC. c. a skin. d. two-faced fabric