the correlation between a car's engine size and its fuel economy is r = - 0.774. what fraction of the variability in fuel economy is accounted for by the engine size?

You hang a heavy ball with a mass of 42 kg from a silver rod 2.7 m long by 1.9 mm by 2.6 mm. You measure the stretch of the rod, and find that the rod stretched 0.002902 m. Using these experimental data, what value of Young's modulus do you get

If 100 J of heat is added to a system so that the final temperature of the system is 400 K, what is the change in entropy of the system? a) - 0.25 J/K b) - 2.5 J/K c) - 1 J/K d) - 4 J/K

What is the max psi of oil?

As more slits with the same spacing are added to a diffraction grating the lines: A. become narrower B. do not change in position or width

What instrument is used to measure temperature?

If traffic is approaching on your left and there is a child riding a bike to your right, you should: A. Move closer to oncoming traffic B. Move closer to the bicyclist C. Pull over until the road is clearer

Alloy parts were cast with a sand mold that took 160 secs for a cube-shaped casting to solidify. The cube was 50 mm on a side. (a) Determine the value of the Chvorinov's mold constant.

Critically analyse a common engineered product in terms of the materials used, the processes required to manufacture the product, and the historical context of the material leading to its present form

Given an unsorted array of distinct positive integers A[1 ... n] in the range between 1 and 10000 and an integer i in the same range. Here n can be arbitrary large. You want to find out whether there are 2 elements of the array that add up to i.

A hydraulic power unit is sometimes referred to as a?