Acar moving south speeds up from 10 m/s to 40 m/s in 15 seconds. What is the car's acceleration?
2 m/s2
15 m/s2
30 m/s2
50 m/s2

Name three different units of energy used to measure heat and describe what type of situations each is usually used.

Unpolarized light of intensity so passes through two sheets of polarizing material whose transmission axes make an angle of 60∘ with each other as shown in the figure. what is the intensity of the transmitted beam, st?

Assume you measured the mass of the cart to be (500 ± 1) g and the mass of the additional mass you put on the cart to be (500 ± 1) g as well. since the scale you are using in the lab cannot measure objects heavier than 600g you will have to sum up individual pieces and propagate the error. so what would be the mass and the standard error of the cart and the mass