Which does not use a wheel and axle?

A doorknob,

a pencil sharpener,

a skateboard,

a rolling pin,

an eggbeater,

a saw.

What is a quantity with only magnithde (no direction). e. g. 5 meters?

How much thermal energy must be added to a 1.4 kg piece of lead to convert it from a solid to a liquid at 327.5∘? Latent heat of fusion for lead is Lf=2.32*104J/kg.

7. What causes waves to bend?

An object was accelerated with a force of 150 N from rest to a velocity of 10m/s in 5 sec. the force of friction opposing the object was 100N. What was the object's mass

How to recount kilograms to force?

Mass number of an atom with 11 protons

Which of the following elements is the most reactive? Beryllium Calcium Magnesium Barium

A flash of white light containing all the colors of the visible spectrum in air shines straight down on the surface of a pool.

A car accelerates uniformly from 0 to 15m/s in 5 s. Calculate acceleration.

Which device would a sleep researcher use to monitor a sleeping person's brain waves?