Does anyone know how to do this question?

Force = 7kN

Pressure = 1mPa

Area = ?

What is the velocity of a wave that has a frequency of 400 Hz and a wavelength of 0.5 meters?

Which sentence describes energy flow through a natural (not manufactured) system?

A boat of mass 115 kg drifts along a river at a speed of 13 m/s to the east. What impulse is required to decrease the speed of the boat to 10 m/s to the east?

What is the difference between transverse waves and longitudinal waves

A 0.45 kg ball is moving horizontally with a speed of 5.3 m/s when it strikes a vertical wall. The ball rebounds with a speed of 2.4 m/s. What is the magnitude of the change in linear momentum of the ball

A set of data is collected from a simple circuit with a 20 resistor and is represented in the table

A skydiver of mass m jumps from a hot air balloon and falls a distance d before reaching a terminal velocity of magnitude v. Assume that the magnitude of the acceleration due to gravity is g. a.

8. What happens to force when mass is increased?

Give an example of ionic and covalent bond, and explain and make an example for each.

Which of these is the best reason for proper nutrition? A. To ensure that you will be skinny B. To protect yourself against certain diseases C. To improve your intelligence D. To ensure that you will get good grades