A car, travelling at 25 m/s, starts to accelerate uniformly at 3 m/s2 for 80 m. What is the car's new speed?

Give your answer to 3 significant figures.​

Which of the following is considered to be a vector?               a.  temperature    b.  velocity    c.  time    d.  mass

In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?

Estimate the kinetic energy of the neptune with respect to the sun as the sum of the terms, that due to its daily rotation about its axis, and that due to its yearly revolution about the sun. [assume the neptune is a uniform sphere with mass = 1.0×1026 kg , radius = 2.5×1010 m , rotation period 16.1 h , orbital period 6.01×104 d and is 4.6×109 km from the sun.]