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A motor having an efficiency of 88% operates a crane having an efficiency of 42%. With what constant speed does the crane lift a 410-kg crate of machine parts if the power supplied to the motor is 5.5 kW?
light from a laser beam with a wavelength of 530 nm passes through a narrow single slit and is observed on a screen 1.0
A half-open pipe is constructed to produce a fundamental frequency of 274 Hz when the air temperature is 20 °C. It is used in an overheated building when the temperature is 37 °C. Neglecting thermal expansion in the pipe, what frequency will be heard..
a heart defibrillator is charged to 350V. It is connected to a patient's chest and allowed to discharge through the heart. After 2secs, how much charge resides on the capacitor
a 1580 kg block of granite is pulled up an incline at a constant speed of 1.43 m/s by a cable and winch. What is the power due to the force applied to the block
you are to design a balloon capable of lifting 200 kilograms the mass of the gas in the balloon must be 200 kilograms
Two cars collide at an intersection. Car A, with a mass of 1900{kg} , is going from west to east, while car B, of mass 1500{kg} , is going from north to south at 17.0{m}/{s} . As a result of this collision, the two cars become enmeshed and move as on..
A space vehicle is coasting at a constant velocity of 15.1 m/s in the +y direction relative to a space station. find the direction of the vehicle's velocity relative to the space station
a rabbit runs in a straight line with a velocity of 1.3 ms for a period of time rests for 12 s and then runs again
The yellow light from a helium discharge tube has a wavelength of 587.5 nm. Calculate the number of lines per centimeter on the grating
A 120 cm length of string has a mass of 2.50 g. It is stretched with a tension of 7.00 N between fixed supports. what is the lowest resonant frequency of this string
two point charges are on the y-axis. a 3.5 microc charge is located at y 1.10 cm and a -2.14 microc charge is located
A square coil of wire with a single turn is placed perpendicular in a uniform 1.0T magnetic field. Each side has a length of 0.5m. The current through the coil is 20A. Determine the magnitude and direction of the magnetic force on each of the four si..
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