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A child's toy consists of a piece of plastic attached to a spring, as shown below. The spring is compressed against the floor a distance 2.5 cm and released. If the spring constant is 119 N/m, what is the magnitude of the spring force acting on the toy at the moment it is released?
An electron is at rest just above the surface of a sphere with the radius of 1.90 mm and a uniformly distributed positive charge of 2.1 x10-15 C.
How many 65W light bulbs can be connected in parallel across a potential difference of 85 V before the total current in the circuit exceeds 2.10A.
The space shuttle performs a retro burn for 3.5min to go from an orbital velocity of 17,500mph to re-entry velocity of 5000mph.
The deflection plates in an oscilloscope are 10 cm by 2 cm with a gap distance of 1 mm. A 100 volt potential difference is suddenly applied to the initially uncharged plates through a 950 ohm resistor in series with the deflection plates.
An emf is induced in a conducting loop of wire 1.11m long as its shape is changed from square to circular.Find the average magnitude of induced emf if the change in shape occurs in 4.03s and the local 0.135-T magnetic field is perpendicular to the ..
The 3.10 kg, 34.0-cm-diameter disk is spinning at 350 rpm How much friction force should the brake apply to the rim to bring the disk to a halt in 2.20 s.
Assume that the volume of the empty spaces between the candes is negligible. If the height of the candes in the container increases at the rate of 0.270 cm/s, at what rate (kilograms per minute) does the mass of the candies in the container increa..
An airplane is flying horizontally with a speed of 1000 km/h(280m/s) when an engine falls off. avoid air resistance,assume it takes 30s for the engine to hit the ground.
What is the muzzle velocity
A 250, 35-cm-diameter turntable rotates on frictionless bearings at 60. A 25 block sits at the center of the turntable. A compressed spring shoots the block thoroughly outward next to a frictionless groove in the surface of the turntable.
The calorimeter is constructed of a material that has a specific heat of 0.10 cal/ g. ^{circ}C. When equilibrium is reached, what will be the final temperature.
What is the minimum coefficient of friction between tires and road that would allow cars to take the turn without sliding off the road.
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