What two qauntities

must be known to calculate the density of a sample of matter

Infrared rays have a shorter wavelength than A. radar waves. B. ultraviolet rays. C. X-rays. D. gamma rays.

Giraffe bending to drink. In a giraffe with its head 1.83 m above its heart, and its heart 2.04 m above its feet, the (hydrostatic) gauge pressure in the blood at its heart is 246 torr.

Which of these best explains why Earth's tectonic plates move? Convection currents in the asthenosphere make fluid particles move. Cooling causes contraction and shifting of the fluid particles in the lithosphere.

A truck travels down the highway at a speed of 110 km/hr. How long does the trip last if the truck covered 2200km?

What is the potential energy for and object with mass of 15 Kg and 20 m above the ground?

When air pressure is lower what happens to a balloon filled with air

Determine the power input for a motor necessary to lift 300 lb at a constant rate of 7 ft/s. the efficiency of the motor is ϵ = 0.65.

The thermal contact resistance at the interface of two 1-cm thick copper plates is measured to be 0.000056 m2K/W.

A provides resistance in an electric circuit. a. wire b. light bulb c. switch. d. battry

Why is it good for scientist to be skeptical