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Two 4.0-g spheres are suspended by 8.0-cm-long light strings (see the figure). A uniform electric field is applied in the x-direction. If the spheres have charges of ?3. 10-8 C and +3. 10-8 C, determine the electric field intensity that enables the spheres to be in equilibrium at ? = 10°.
A huge explosion is heard 77.7 miles away. How long does it take the sound to travel that far
A 10.0-uF capacitor, a 40.0-uF capacitor, and a 100.0-uF capacitor are connected in parallel across a 12.0v battery. what is the equivalent capacitance of the combination
A 37.6 kg crate rests on a horizontal floor, and a 76.1 kg person is standing on the crate. Determine the magnitude of the normal force
A force that varies linearly with time according to a relation F = 4t N is applied to an object travelling with a speed of 16-m/s. If the force decelerates the object to a complete stop in 5s, determine the object's mass. Imagine the force is at f..
A ballerina spins initially at 1.5 revolutions/second when her arms are extended. Determine her initial moment of inertia
Your are sitting in your car, which is standing at the side of the road with the engine idling. After what distance will you catch up with your classmate
A projectile is fired with an initial speed of 68.8 at an angle of 37.8 above the horizontal on a long flat firing range. Find out the maximum height reached by the projectile.
How fast should the car be traveling just as it leaves the cliff in order to just clear the river and land safely on the opposite side?
A 410 W Carnot engine operates between constant-temperature reservoirs at 98°C and 49°C. find the rate at which energy is exhausted by the engine as heat
A man applies a force of F = 3.00 102 N at an angle of 60.0° to a door, x = 2.20 m from the hinges. Find the torque on the door
A hot-air balloon is ascending at the rate of 14 m/s and is 98 m above the ground when a package is dropped over the side. How long does the package take to reach the ground
In coming to a stop, a car leaves skid marks 82m long on the highway. Assuming a deceleration of 6m/s2, estimate the speed of the car just before braking.
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