Does the accuracy of a measurement made always depend on the precision of the instrument used to make the measurement? Why or Why not?

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

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1

Looking at this barometer, is the air pressure high or low? what type of weather would you expect? high, bad low, bad high, good low, good