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A small ferryboat is 4.00 m wide and 6.00 m long. When a loaded truck pulls onto it, the boat sinks an additional 4.20 cm into the river. What is the weight of the truck?
In a certain binary-star system, each star has the same mass which is 9.6 times of that of the Sun, and they revolve about their center of mass. What is their period of revolution in years
Three sheets of plastic have unknown indices of refraction. Sheet 1 is placed on top of sheet 2, what is the expected angle of refraction in sheet 3
A carpenter carries his 8kg toolbox at constant speed up 2 flights of stairs, each 3m high, in one minute. How much work did the carpenter do in carrying the toolbox up 2 flights
A laser peripheral iridotomy is a procedure for treating an eye condition known as narrow-angle glacoma, How many photons does the laser deliver
Consider a violin string with a vibrating length of 30 cm. If the speed of a wave on this string is 250 m/s, what is the tension in the string? Hint: You will have to estimate the diameter of the string. Assume the density is the same as that of s..
An inclined plane of angle ? = 20.0° has a spring of force constant k = 495 N/m fastened securely at the bottom so that the spring is parallel to the surface as shown in the figure below. A block of mass m = 2.39 kg is placed on the plane at a dis..
Suppose that when a certain sound intensity level (in dB) triples, the sound intensity (in W/m2) quadruples. Determine this sound intensity level
How much force is required to hold a 7.20 cm diameter hose delivering 470 L/min by a 0.73rm cm diameter nozzle.
A distance away from a uniformly charged spherical object, the magnitude of the electric field is 575V/m and the electric potential is 3.50kV. (a) What is the distance to the center of the object? (b) What is the magnitude of the charge?
The world's largest refracting telescope is operated at the Yerkes Observatory in Wisconsin. It has an objective of diameter of 1.02 m. What is the minimum separation of two objects on the ground
A flywheel in the form of a uniformly thick disk of radius 1.23 m, has a mass of 45.1 kg, Calculate the constant torque required to stop it in 1.25 min
A parallel-plate capacitor has circular plates of 10.4 cm radius and 1.67 mm separation. Calculate the capacitance in picofarads
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