For Questions 4-8, calculate (a) the Mechanical Advantage MA, (b) the effort required to lift the load, and (c) the quantity of rope pulled to raise the load the given distance.

a
Effort
E
b
С
490 N lifted 3 inches
5.
4 meters
b
1960 N
lifted 1
meter
b
Effort
150 lbs
lifed 12 ft

Your target variable is δf, the magnitude of the difference in frequency between the waves emitted from the sonar device and the waves received by the device after reflecting off the whale. write an expression for δf in terms of the relevant frequencies using the subscript notation introduced above.

Henry, whose mass is 95 kg, stands on a bathroom scale in an elevator. the scale reads 830 n for the first 2.4 s after the elevator starts moving, then 930 n for the next 2.4 s. part a what is the elevator's speed 4.8 s after starting? express your answer with the appropriate units.

What happens when the vapor pressure of a liquid is equal to the external pressure?