You don't have any matches, so you want to focus sunlight to ignite a pile of twigs for a campfire. Which mirror would be best to use? A. convex mirror B. concave mirror C. flat mirror D. plane mirror

In a certain right triangle, the two sides that are perpendicular to each other are 7.00 m and 8.30 m long. What is the tangent of the angle for which 7.00 m is the opposite side?

A horse runs around a circular track that is 350.0 m long. He runs clockwise from the start line back to the start line, then turns back and goes counterclockwise back to the start line again. What is the horses displacement? A. 0 m B. 300.

What is the time lapse between seeing a lightning strike and hearing the thunder if the lightning flash is 47 km away? The speed of light waves in air is 3 * 108 m/s and the speed of sound waves in air is 333 m/s.

What definition fits the ability to do work

Supernova explosions are known to release a large amount of energy. A detector for which type of electromagnetic radiation is most suitable to study a supernova explosion? Gamma ray Infrared Radio wave Visible light

A 12,000-N car is raised using a hydraulic lift, which consists of a U-tube with arms of unequal areas, filled with incompressible oil with a density of 800 kg/m3 and capped at both ends with tight-fitting pistons.

The standard metric units of measurements for electric field strength are?

What steps are involved in converting potential energy to kinetic energy, or kinetic energy to potential energy?

A 50 Newton box is moved a distance of 12 meters. How much work was done on the box?

An alloy is made of a material of specific gravity 7.87 and another material of specific gravity 4.50. The alloy of mass 750g has an apparent weight of 6.6N when totally immersed in a liquid of specific gravity 0.78.