Thank you :) Joe looks at a bird and says it is moving to the right. Shmo looks at the same bird at the same moment, but he says it is moving to the left. Which is true?

a. Joe and Shmo must be in different reference frames.
b. The bird is actually not moving at all.
c. Joe and Shmo must have the same speed and direction (This answer is incorrect)
d. One of them is right and one of them is wrong.

Sara is creating an experiment. her hypothesis states the following. if i increase the air in my tires, then i will get better gas mileage. if this is her hypothesis what column titles do we need in our date table? a. air pressure in tire (psi) and gas mileage (mph) b. air pressure in the atmosphere (psi) and gas mileage (mph) c. miles (m) and gallons per mile (g) d. old battery and new battery

Yardım edin lütfen uzun cevap lazım çok puan veriyorum

(a) assume the equation x = at^3 + bt describes the motion of a particular object, with x having the dimension of length and t having the dimension of time. determine the dimensions of the constants a and b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.) (b) determine the dimensions of the derivative dx/dt = 3at^2 + b. (use the following as necessary: l and t, where l is the unit of length and t is the unit of time.)