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A box of mass 2.50kg is sliding at a constant speed down an inclined plane that is inclined at 25 degrees. What is the force of friction acting on the box? Please be clear with the math.
A chunk of metal is held stationary, suspended by a string and the tension in the string is 19.6 N. What is the mass of the chunk of metal
You have a small electromagnet that consumes 320 W from a residential circuit delivering 115 V at 50.0 Hz. What is the internal resistance of the electromagnet
A Carnot cycle takes 92 cycles to lift a 10 kg mass a height of 13m. What is the temperature of the hot reservoir
Several ice cubes (pi = 0.9167 g/cm3) of total volume Vi = 240 cm3, Calculate the amount of heat energy Qm in J needed to melt the ice cubes (Lf = 334 kJ/kg)
Light from a laser strikes a diffraction grating that has 4250 grooves per centimeter. Find the wavelength of the laser
Susan (mass=52 kg) rides upward in an elevator while standing on a bathroom scale. The scale reads 575 N. Calculate the resultant force acting on Susan
You use a sequence of ideal polarizing filters, each with its axis making the same angle with the axis of the previous filter, to rotate the plane of polarization of a polarized light beam by a total of 45.0°. You wish to have an intensity reducti..
q1. a block is placed at the end of the frictionless ramp and is pulled up the ramp through a solid ball on the end of
In a particular region of Earth's atmosphere, the electric field above Earth's surface has been measured to be 147 N/C downward at an altitude of 250 m, Calculate the volume charge density of the atmosphere
The current in a series circuit is 14.9 A. When an additional 10.6-? resistor is inserted in series, the current drops to 9.47 A. What is the resistance in the original circuit
An auto goes from 0 to 30 m/s in 5 s, at a uniform rate of acceleration. The radius of the auto's tires is .33 m. How many revolutions per second are the tires making
A trap door, of length and width 2.35 m, is held open at an angle of 65.0° with respect to the floor. what is the torque exerted on the trap door by the rope
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