How is current affected if the time interval over which the charge passes through a given area decreases while the amount of charge remains the same? a. the current increases. b. the current decreases. c. the current initially increases and then is gradually restored. d. the current is not affected.

You carry a 7.0-kg bag of groceries 1.2 m above the ground at constant speed across a 2.7m room. how much work do you do on the bag in the process? (a) 157j (b) 0.00j (c) 185j (d) 82j

If angle "a" is 25°, angle "b" is: a) equal to angle c b) less than angle c c) greater than angle c

At 20∘c, the hole in an aluminum ring is 2.800 cm in diameter. you need to slip this ring over a steel shaft that has a room-temperature diameter of 2.804 cm . 1. to what common temperature should the ring and the shaft be heated so that the ring will just fit onto the shaft? coefficients of linear thermal expansion of steel and aluminum are 12×10−6 k−1 and23×10−6 k−1 respectively.