When an object is getting closer to us, it emits redder light. True or False

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?