Why February contains 28 or 29 days?

A phase diagram depicts the relationship between the physical state of a substance and its temperature and pressure. true or false?

Two 10-cm-diameter charged rings face each other, 23.0 cm apart. Both rings are charged to + 10.0 nC. What is the electric field strength at the center of the left ring?

How much time will it take a car travelling at 88 km/hr (55 mi/hr) to travel 500km?

2. A can filled with sand has a mass of 0.65kg is swung overhead in a horizontal circle of radius 0.70m at a constant rate of 2.5 revolutions per second. Find the angular momentum of the rock.

Wich factors affect the electrical force between two objects?

Which of the following statements are correct? 1. Electrons and protons have identical masses but opposite charges. 2. Most of an atom's mass is concentrated in a small, positively charged, nucleus. 3.

What are some changes that can be caused by sound energy?

A cheetah can run at 30 m/s, but only for about 12s. How far will it run in that time

A car is traveling 80 km/h if the car's speed remains constant how far will it have traveled in 3 hours a. 3km b. 26.7km c. 80 km d. 240 km

True or False? Gases such as water vapor condense when they are * heated*.