The data below are taken from a test of a petrol engine for a motor car.
power output 150
kw
fuel consumption 20 liters per hour
energy content of fuel 40
mj per litre
which expression will evaluate the efficiency of the engine?

How much work is done lifting a 9.10 kg box straight up onto a shelf that is 1.80 m high?

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.

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.