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You hang a book bag on a spring scale and place the bag on a platform scale so that the platform scale reads 26.7N and the spring scale reads 14.6NDraw a force diagram for the bag.
What is the magnitude of the force that Earth exerts on the bag?
A 2kg mass is loaded into a spring cannon. The cannons spring has a constant k=4000N/m and the spring is compressed 0.8m. The mass is initially at rest. what is the initial velocity of the mass
A gold prospector finds a solid rock that is composed solely of quartz and gold. Find the mass of the gold in the rock
A sphere that is a perfect blackbody radiator has a radius of 0.140 m and is at 250°C in a room where the temperature is 27°C. find the net rate at which the sphere radiates energy.
A uranium and iron atom reside a distance R = 59.70 nm apart. The uranium atom is singly ionized; the iron atom is doubly ionized. what is the magnitude of the force on the electron from the uranium ion
Light shines during a single slit whose width is 4.60*10-4 m. A diffraction pattern is formed on a flat screen located 3.8 m away. The distance among the middle of the central bright fringe and the first dark fringe is 6.50 mm. What is the wavelength..
a car starts from rest on a curve with a radius of 190 and accelerates at 0.500 . how many revolutions will the car
A car is normally capable of an acceleration of 3m/s2. If it is towing a trailer with half as much mass asthe car itself, what acceleration can it achieve?
A 20.0 ?, 9.00 ?, and 9.00 ? resistor are connected in parallel to an emf source. A current of 6.00 A is in the 9.00 ? resistor. Calculate the equivalent resistance of the circuit
A 369-N, uniform, 1.11-m bar is suspended horizontally by two vertical cables at each end. What is the heaviest weight you can put on without breaking either cable
A 70 kg astronaut floating in space in a 110 kg MMU (manned maneuvering unit) experiences an acceleration of 0.029 m/s2 when he fires one of the MMU's thrusters. What is the thrust of the thruster
An electron moves at a speed of 15000 m/s in a circular path of radius 2.2 cm. Find the strength of the magnetic field inside the solieod
A Carnot heat engine takes 89 cycles to lift a 15 kg mass a height of 15 m. What is the temperature of the hot reservoir in Celsius
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