You are driving on the highway at constant speed of 60 mph for 1 hour and then 70 mph for 2 hours. What was your average speed for the 3 hours trip?

A wave with a frequency of 500 Hz is traveling at a speed of 200m/s. what is the wavelength of this wave?

Which of the following are not clues that a chemical reaction has taken place? A. Steam B. Formation of a gas C. Change in color D. Constant temperature

Part A If the accuracy in measuring the position of a particle increases, what happens to the accuracy in measuring its velocity?

A remote-controlled car's wheel accelerates at 22.7 rad/s2. if the wheel begins with an angular speed of 10.1 rad/s, what is the wheel's angular speed after exactly eighteen full turns? answer in units of rad/s.

What is the special feature of the upper mantle?

Which statement is true about a polarized object? A) It gains electrons and becomes negatively charged. B) It gains protons and becomes positively charged. C) The number of positive and negative charges can be the same. D) It has to be a metal.

Define the law of conservation of momentum in one sentence

A shopping cart rolls from x=19.9m to x=5.40m with an average velocity of - 0.418m/s. How much time did it take? (unit=s)

Where does the energy of a nuclear power plant come from?

When the vapor pressure of a liquid is equal to the atmospheric pressure the liquid?