The velocity of a moving particle varies with time t as v = t^3 - 2√t + 1 where v is in m/s and t is in second. find the acceleration of the particle at t = 4s. umm help? fank you tho <3​

If a spring has a k value of 100 newtons per meter and it is stretched 0.50 meters, what is the restoring force of the spring?

Wavelength,frequency,and energy are related.what happens to a wave as it’s wavelength gets shorter?

Which features on mars point to the possibility of liquid water on the planet? impact craters with sharp rims volcanic cones with craters gullies and stream-like channels mountain ranges with faults