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A roller coaster seat exerts a normal force of 120N on a 40kg passenger at the apex of a vertical loop. what is the speed of the coaster
A 13-kg block rests on a level floor. A 300-g glob of putty is thrown at the block so that the putty travels horizontally, hits the block, what is the initial speed of the putty
When he was first thinking about relativity (and before he developed his theory), find the your friend's speed relative to your reference frame
given an electric dipole moment p, in a region of uniform Eo. determine the torque of the dipole moment
An iron bar 40 cm long is braised to a copper bar 50 cm long and of the same diameter. determine the temperature of the junction point
A 109-rad dose of radiation is administered to a cancer patient (mass = 73) kg). how much energy is absorbed
The largest fusion bomb ever detonated (called the Tsar Bomba) was tested by the Soviet Union in 1961. If this bomb used the deuterium-deuterium fusion reaction, how many kilograms of deuterium were r
welding machine draws a 18A of current at 240V. When it is inadvertently connected to a 120V outlet, the current in it is 10A. Is the machine's resistance ohmic
A 2.0kg block of wood sits on a table. A 3.0 g bullet, fired horizontally at a speed of 360m/s, find the speed of the block immediately after the bullet exits
In a television set the power needed to operate the picture tube comes from the secondary of a transformer. Find the turns ratio Ns/Np of the transformer
A vacuum cleaner is plugged into a 120.0-V socket and uses 2.4 A of current in normal operation, Find the coil resistance of the motor
An air conditioner removes 5.0 * 105 J/min of heat from a house, What is the air conditioner's coefficient of performance
A copper wire has a 25-m ohm resistance at 20 degrees C. When the wire is carrying a current, What is the change in the wire's resistance
A 4.0 kg ball is traveling at 3.0 m/s and strkes a wall. The 4.0 kg ball bounces off the wall with a velocity of 4.0 m/s. determine the average force on the ball
A diverging lens (f = -10 cm) is located 20.0 cm to the left of a converging lens (f = 31.5 cm). A 3.00 cm tall object stands to the left of the diverging lens, What is the height of the final image
If this radiation is directed at a crystal, the first-order maximum in the reflected radiation occurs when the angle of incidence is 2.17o. What is the spacing between reflecting planes in the cryst
Light with wavelength 595nm is incident on a 2.6?m wide slit. Find the angular width of the central peak in the diffraction pattern
Two microscopes are placed one on top of the other. They are in contact at one end but a hair separates them at the other end. determine the thickness of the hair?
What is the efficiency of a cyclical heat engine in which 65.0 kJ of heat transfer occurs to the environment for every 95.0 kJ of heat transfer into the engine
Suppose that a 1.00 cm3 box in the shape of a cube is perfectly evacuated, except for a single particle of mass 1.19 multiply.gif 10-3 g. Find the temperature inside the box
A liquid with a specific gravity of 0.72 is flowing at 5.5 ft/sec through a 6 inch diameter pipe (ID=6.065 inches). What is the volumetric flow rate
Monochromatic light with wavelength 580nm passes through a single slit 2.40 um wide and 1.70m from a screen.
Suppose a tank contains 624 m3 of neon (Ne) at an absolute pressure of 1.01 105 Pa. What is the increase in the internal energy of the neon
A car weighing 1.06 multiply.gif 104 N is at rest on a 29.0° incline. Each wheel bears an equal part of the car's weight. Find the frictional force exerted by the road on each wheel
You can simulate radioactive decay by tossing pennies. Assemble a collection of as many pennies (or other coins) as you can; around 100 would be ideal. What is the half-life in numbers of tosses