Why is random sampling and random assignment in experimental research important?

Name three elements that are good conductors of heat

A 1650W hair drier is plugged into a 110V outlet, how much resistance does it have?

In a circuit, a 10 Ω resistor is connected in series to a parallel group containing a 60 Ω resistor and a 5 Ω resistor. What's the total resistance in this circuit?

A pair of narrow parallel slits are separated by a distance of 0.250 mm and illuminated by a green light with wavelength 5.461 x 10-4mm.

Is AG on the periodic table

a submarine moving directly upward in the water at constant speed. The weight of the summer and it is 500,000 N. The submarines motors are off. The magnitude of the buoyant force acting on the submarine is

If the car went 30 km west in 25 min. and then 40 km east in 35 min., what would be its total displacement?

Which of the following is not the name of a space station that was in orbit around Earth?

Relationship between acceleration and free fall

A SI unit used to measure force, equal to less than one-quarter of a pound, is the what