Amachinist turns the power on to a grinding wheel, at rest, at time t = 0 s. the wheelaccelerates uniformly for 10 s and reaches the operating angular velocity of 38 rad/s. the wheel is run at that angular velocity for 30 s and then power is shut off. the wheelslows down uniformly at 2.1 rad/s2until the wheel stops. in this situation, the angularacceleration of the wheel between t = 0 s and t = 10 s is closest to:

a) 6.1 rad/s2
b) 6.8 rad/s2
c) 3.8 rad/s2
d) 4.6 rad/s2
e) 5.3 rad/s2

The average density of the planet uranus is 1.27 103 kg/m3. the ratio of the mass of neptune to that of uranus is 1.19. the ratio of the radius of neptune to that of uranus is 0.969. find the average density of neptune.

You want to lose weight and have been trying to decide which type of fad diet is best for you. you ask your doctor, who responds that a. fad diets are a temporary fix but generally don't have any side effects b. fad diets can be used several times a year to maintain a healthy weight c. fad diets can be risky for your health and, in the long run, do not work d. fad diets should never be used one right after the other; there should be a break between them select the best answer from the choices provided. a b c d

Place several e-field sensors at a few points on different equipotential lines, and look at the relationship between the electric field and the equipotential lines. which statement is true? 1-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of higher voltages. 2-at any point, the electric field is perpendicular to the equipotential line at that point, and it is directed toward lines of lower voltages. 3-at any point, the electric field is parallel to the equipotential line at that point.