Question 10 of 10 Which three applications use technologies that apply the Doppler effect?
O A. Air-traffic control
B. Pest control
O C. Building inspection
D. Weather forecasting

Polly is pushing a box across the floor with a force of 30 n. the force of gravity is –8 n, and the normal force is 8 n. which value could describe the force of friction if polly could not move the box?

The coefficient of friction is a number that represents the resistance to sliding between two in contact with one another.

Engineers find a new metal that is stronger than steel but much lighter. this material is also significantly cheaper than what is currently used for most aircraft, available in large quantities, and easy to manufacture. the engineers are excited because this new material will lower the costs of buying and operating airplanes for companies. what is probably the best step for the engineers to make next?