A500 kg piano is being lowered into position by a crane while two people steady it with ropes pulling to the sides. bob’s rope pulls to the left, 15° below horizontal, with 500 n of tension. ellen’s rope pulls toward the right, 25° below horizontal. what tension must ellen maintain in her rope to keep the piano descending vertically at constant speed? what is the tension in the vertical main cable supporting the piano?

Explain the difference between each pair of concepts. a. frequency and relative frequency b. percentage and relative frequency a. select the correct choice below. a. frequency is the total number of observations in a data set. relative frequency is the number of times a particular distinct value occurs. b. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of a value to the total number of observations. c. frequency is the total number of observations in a data set. relative frequency is the ratio of the number of times a particular distinct value occurs to the frequency. d. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of two different values.

What causes the formation of ocean currents?

Is there a point between a 10 nc charge and a 20 nc charge at which the electric field is zero?