In a race, Usain Bolt speeds up from 0 m/s to 16 m/s at an acceleration rate of 4 m/s/s. How long does it take him to get up to speed?

Waves that cause the most damage during an earthquake are a. surface waves c. s waves b. p waves d. ocean waves

Write the function getkthdigit(n, k) that takes a possibly-negative int n and a non-negative int k, and returns the kth digit of n, starting from 0, counting from the right

An astronaut in space cannot use a scale or balance to weigh objects because there is no gravity. but she does have devices to measure distance and time accurately. she knows her own mass is 77.4 kg , but she is unsure of the mass of a large gas canister in the airless rocket. when this canister is approaching her at 3.50 m/s , she pushes against it, which slows it down to 1.30 m/s (but does not reverse it) and gives her a speed of 2.60 m/s . what is the mass of the canister?