What type of wave cannot travel in a vacuum

What type of infant temperament is generally associated with better adjustment in adulthood?

Henry can lift a 200 N load 20 m up a ladder in 40 s. Ricardo can lift twice the load up one-half the distance in the same amount of time. Which comparison between Ricardo and Henry is correct?

What term is used for the controlling of the color temperature of light that the camera will capture?

What is the difference between current and voltage besides their units of measurement

A water rocket has a mass of 0.8kg and is launched in a school playground with an inital upwards force of 12newtons.

Changing the direction of current will or will not affect the strength of an electromagnet

A swimming pool has the dimensions of 10 meters, 5 meters, and 1 meter. What is the pool's volume? 50 m 50 m3 50 m2 25 m3

A child pushes horizontally on a box of mass m which moves with constant speed v across a horizontal floor. The coefficient of friction between the box and the floor is μ. At what rate does the child do work on the box?

What two qauntities must be known to calculate the density of a sample of matter

An element's atomic number is 38. How many protons would an atom of this element have?