Convection can occur in which two substances?

a) wood and air

b) ice and wood

c) water and ice

d) air and water

What are the horizontal and vertical parts of vectors called

Suppose you exert a 25-N force to lift a ball 0.4 m in 2 s. How much work is done?

Are rocks made of matter?

Why is sky blue and why moon appear in daytime

Sienna made a chart listing the steps that describe how a four-stroke heat engine operates. Which best describes Sienna's error?

What happens to the speed of the particles if the temperature is increased

A 65-year-old male enters the hospital with high blood pressure, damaged lungs, low blood-oxygen concentration, and throat cancer. What are all of these symptoms associated with?

At a certain factory, 340 kg crates are dropped vertically from a packing machine onto a conveyor belt moving at 1.00 m/s. (A motor maintains the belt's constant speed.) The coefficient of kinetic friction between belt and crate is 0.400.

A hydraulic lift is used to lift a heavy box that is pushing down on a 1.5-m2 piston with a force of 1,700 N. What force needs to be exerted on a 0.12-m2 piston to lift the box?

Rauol's friend Johnny sets out from his house in the city. His displacement is 900 m 80° North of west. What is the x component of his displacement vector?