An elevator is accelerating upwards at 3m/s. It has a mass of 300k. What is the net force (in Newton's) in the y-direction

Uma garota de 50 kg esta sobre um skate de 10kg, ambos movendo se em sentido horizontal, da esquerda para a direita, a velocidade de 2m/s com relacao ao solo.

Momentum can be conserved in two-dimensional collisions, but kinetic energy is only conserved in some one dimensional collisions. a. True b. False because kinetic energy can be conserved in 2-d collisionsc.

If a guitar string has a fundamental frequency of 500 Hz, what is the frequency of its second overtone?

A certain nuclear power plant is capable of producing 1.2*10^9 W of electric power. During operation of the reactor, mass is converted to energy.

What is scientific reasoning?

Suppose s (t) is the position of an object moving along a line at time t is greater than or equal to 0. What is the average velocity between the times t=a and t=b? What is the instantaneous velocity at t=a?

Estimate how long it would take one person to mow a football field using an ordinary home lawn mower. suppose that the mower moves with a 1-km/h speed, has a 0.5-m width, and a field is 360 ft long and 160 ft wide. 1 m = 3.281 ft.

Badri makes the table below to review the factors that affect the electric force between objects. Which change will correct the error in Badri's table?

A star with the same mass of the sun has a newly discovered planet whose semi-major axis of 2.48 au and an eccentricity of 0.08. what is the aphelion distance of the new planet

A weather balloon is inflated to a volume of 2.2 x 10^3 L with 374 g of helium. What is the density of helium in grams per liter?