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A bullet of mass 12 grams is fired into a large block of mass 1.5 kg suspended from light vertical wires. The bullet imbeds in the block and the whole system rises 10 cm. Find the velocity of the bullet just before collision?
A 70 kg man walks along a 40 kg horizontal plank which is 2 m long. The plank is attached to a hinge mounted to one wall, calculate the force provided by the hinge on the wall
An alert physics student stands beside the tracks as a train rolls slowly past. He notes that the frequency of the train whistle is 443 Hz when the train is approaching him.
A Geiger counter reading of a radioactive sample is initially 7120 counts per minute. What is the sample's half-life
An ambulance with a siren emitting a whine at 1200 Hz overtakes and passes a cyclist pedaling a bike at 2.44 m/s, How fast is the ambulance moving
In a television picture tube, electrons strike the screen after being accelerated from rest through a potential difference of 33 500 V. find the electron speed just before the electron strikes the screen
A microwave oven operates with sinusoidal microwaves at a frequency of 2400 MHz. The height of the oven cavity is 25 cm, What is the amplitude of the electric field
A diverging thin lens and a concave mirror have focal lengths of equal magnitude. Determine the properties of the final image of the system affter two refractions
The height of an empty can is H, and the mass M. The mass of a full can is m, What is the center of mass of the can as a function of x? h is the height from the bottom to the surface
A parallel- plate,air-gap capacitor has a capacitance of 28 pF. The platesare separated by 1.2mm. (1 pF = 1 x 10-12F, 1 mm = 1 x10-3m) What is the area of each plate? What is the charge on each plate if the potential difference is 75V?
Sam, whose mass is 80kg , takes off across level snow on his jet-powered skis. The skis have a thrust of 250N and a coefficient of kinetic friction on snow of 0.1, What is Sam's top speed
A square loop of wire has sides of length 3 cm. A magnetic field points out of the screen; its magnitude is B = 3.0t2y, What is the emf around the square at t = 2.00 s
A 4.4 kg block is pushed 6.6 m up a rough 35° inclined plane by a horizontal force of 74 N. estimate the work done by the horizontal force
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