(for problems 1 - 3) the velocity v (in cm/s) of a rolling ball at time t (in seconds) is recorded below. t 0 1 2 3 4 5 6 7 8 v 1.0 2.0 4.0 8.0 16.0 32.0 64.0 128.0 256.0 estimate the total distance the ball traveled during the eight-second interval by finding: 1. r4 = 2. m4 = 3. l4 =

Around faucet handle is part of a(n) a. lever b. screw c. inclined plane d. wheel and axle

Modern physics a photon emitted from an excited hydrogen atom has an energy of 3.02 electron volts. which electron energy-level transition would produce this photon? a. n=1 to n=6 b. n=2 to n=6 c. n=6 to n=1 d. n=6 to n=2 i chose b but the correct answer is d can someone tell me why? and what's the difference?

You are given two vectors a⃗ =−3.00ι^ 5.00j^ and b⃗ =5.00ι^ 2.00j^. let the counterclockwise angles be positive.