If a guitar string vibrates 20 times each second, what is its frequency?

If a helicopter's mass if 4500kg and the net force onit is 18000 N upward what is its acceleration?

A plane comes in for landing at a velocity of 80 meters per second west. As it touches down, it decelerates at a constant rate of 3 meters per second per second.

3) A car company is looking to design an electric car. Which of these would not be a constraint that would limit possible designs? A) Electric cars must be approximately the same size as other cars.

Which of the following processes does not decrease the salinity of seawater?

A plane is flying due east in still air at 395 km/h suddenly the plain is hit by wind blowing at 55km/h toward the west what is the resultant velocity

What part of a circuit has the main job of conducting the electricity?

One-half kg of Refrigerant 134a is contained in a piston-cylinder assembly, initially a saturated vapor at 200 kPa. The refrigerant undergoes a process for which the pressure-specific volume relation is p v^1.

Your favorite radio station is 106.7. What are the units on this number and what do they mean in terms of harmonic motion?

What are the 3 most important characteristics of each celestial object?

an object with a mass of 6.0 kg accelerates 4.0 m/s² when an unknown force is applied to it. what is the amount of force?