What is the weight of a 20kg stone?

When an element is heated in a bunsen burner flame, the resulting color of the flame changes can be used to identify the element.

An atom that changes so that it has an electrical charge is a (n)

Why is the world a globe not a cube or pyramid?

An insulated rigid tank contains 4 kg of argon gas at 450 kpa and 30°c. a valve is now opened, and argon is allowed to escape until the pressure inside drops to 200 kpa.

The world record for the men's marathon, 42 km, is 2 hours and 3 minutes.

A 30-g bullet is fired with a horizontal velocity of 450 m/s and becomes embedded in block B, which has a mass of 3 kg. After the impact, block B slides on 30-kg carrier C until it impacts the end of the carrier.

11) Shifting with ease from one type of problem-solving strategy to another is called a) flexibility b) versatility c) originality d) openmindedness

A truck undergoes a constant acceleration of 2.0 meters/second2 on a highway that slopes upward at an angle of 30.0° to the horizontal. What is the magnitude of the horizontal component of the acceleration?

Why is there so much more carbon dioxide in the atmosphere of Venus than in that of Earth? Why so much more carbon dioxide than on Mars?

People have proposed driving motors with the earth's magnetic field. This is possible in principle, but the small field means that unrealistically large currents are needed to produce noticeable torques.