8. A car moved 20 km East and 70 km West.

What is the distance?

Consider four different types of electromagnetic radiation: microwaves, infrared, ultraviolet, and X-rays. Arrange the types of radiation from the lowest to the highest frequency, and from the highest to the lowest energy.

Compute the resistance of a hardened copper rod 2 meters long and 8 mm in diameter if resistivity of the material is 1.756 x 10^ (-8) ohm-meters?

A cargo elevator on Earth (where g = 10 m/s2) lifts 3000 kg upwards by 20 m. 720 kJ of electrical energy is used up in the process. What is the efficiency of this process?

A 2.34 kg book is dropped from a height of + 3.1 m. (a) What is its acceleration?

The table lists the values for two parameters, x and y, of an experiment. What is the estimated value of x for y = 0.049?

If 2 grams of element X combine with 4 grams of element Y to form compound XY, how many grams of element Y would combine with 46 grams of X to form the same compound?

How do positive and negative charges interact with each other?

What is electricity

What happens to the density as one progresses through the layers of the earth from the lithosphere toward the inner core

What is tiny holes on the surface of a plant?