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Evaluate what is the magnitude of the acceleration of a modified Atwood machine if the mass of the cart is 3 kilogram and the hanging mass is 6 kilogram? (Use g = 9.8 m/s2. Express your answer to one decimal point.)
An ambulance is generating a siren sound at a frequency of 1,800 Hz. The velocity of sound is 335.0 m/s. What is the frequency of the siren perceived by the observer
A beam contains 3.0 x 106 doubly charged positive ionsper cubic centimeter, all of which are moving north with a speed of5.4 x 105 m/s. What is the magnitude of the currentdensity?
A 12.5 gram bullet is fired into a board. The board is subjected to a force of 3.50x104 Newtons when it hits the board. If the bullet travels 3.50 cm before coming to a stop, what was the initial speed of the bullet
A canoe racer (canoe + racer = 105 kg) changes the velocity of his canoe from 2.00 m/s to 3 5 m/s with each stroke. If the force is applied for 0 60 s. what is the average force applied and the distance travelled during force application?
A heat engine using a diatomic ideal gas goes through the following closed cycle: Isothermal compression until the volume is halved. What is the thermal efficiency of this heat engine
An object that is 27 cm in front of a convex mirror has an image located 13 cm, How far behind the mirror is the image located when the object is 13 cm in front of the mirror
Estimate how much power is saved if the voltage is stepped up from 240 V to 1200 V and then down again, rather than simply transmitting at 240 V
An unstretched spring with spring constant 21 N/cm is suspended from the ceiling. A 3.3 kg mass is attached to the spring and let fall. To the nearest tenth of the centimeter, how far does it stretch the spring.
A ship sails from seawater (specific gravity 1.025) into freshwater and therefore sinks slightly. find the combined mass of the ship and cargo before it was unloaded
a thin converging lens is found to form an image of a distant building 24 cm from the lens. if an object is placed 16 cm from the lens, how far from the object will the image be
Derive an expression for spring potential energy (Us), where the spring force is Fs = -kx and delta U = -Wc, where Wc is the work done by conservative forces
Equipotential surface A has a potential of 5950 V, while equipotential surface B has a potential of 8400 V. How much work is done by the outside force in moving the particle from A to B
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