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If the atom's diameter is 1 10-10 m in its lowest energy state, what is its diameter in state number 41? How many unexcited atoms could be fit within this one giant atom?
For a particular scientific experiment, it is important to be completely isolated from any magnetic field, including the earth's field. A 1.50m-diameter current loop with 220 turns of wire is set up
An 80 g arrow is fired from a bow whose string exerts an average force of 95 N on the arrow over a distance of 84 cm. What is the speed of the arrow as it leaves the bow?
The bullet becomes embedded in the block. If the bullet-block system compresses the spring by a maximum of 70.0 cm, what was the speed of the bullet at impact with the block?
A mass of 3.0 kg rests on a smooth surface inclined 28 degrees above the horizontal. It is kept from sliding down the plane by a spring attached to a wall. The spring is aligned with the plane and h
A Hill that has a 12.0% grade is one that rises 12.0m vertically for every 100.0 m of distance in the horizontal direction. At what angle is such a hill inclined above the horizontal?
A severe thunderstorm dumps 1.5 in. of rain in 30 min on a town of area 38 km2. What volume of water, in acre-feet, fell on the town?
An opaque card is then introduced covering only the upper half of the lens. What happens to the image on the screen?
The small currents in axons corresponding to nerve impulses produce measurable magnetic fields. A typical axon carries a peak current of 0.040mu*A. What is the strength of the field at a distance o
a circular plate with radius 1.26 m contains 724 μC of a charge uniformly distributed. Find the magnitude of the electric field near the plate.
A cop car drives at 30 m/s toward the scene of a crime, with its siren sounding (f = 2125 Hz.) Calculate the frequency heard by people at the crime scene as the siren approaches and the frequency he
A simple harmonic oscillator consists of a block of mass 3.50 kg attached to a spring of spring constant 210 N/m. When t = 2.30 s, the position and velocity of the block are x = 0.140 m and v = 2.81
Light of wavelength 520 nm is incident normally on a diffraction grating. Determine the total number of primary maxima that can be observed in this situation.
if the bucket is raised to the top of the well and released, what is the acceleration of the bucket as it falls toward the bottom of the well? (assume rope's mass is negligible, that cylinder turns
A firefighter of mass 89 kg slides down a vertical pole with an acceleration of 3 m/s2. The acceleration of gravity is 10 m/s2 . What is the friction force that acts on him? Answer in units of N.
If the bullet has a mass of 28.0 and a speed of 410 , how high will the block rise after the bullet becomes embedded in it?
A 38.0 ohm resistor is made from a coil of copper wire whose total mass is 11.2 g. Find the length and diameter of the wire.
A string passes over a frictionless pulley and connects a 250 g block to 2.00 kg block. The inclines are frictionless. Assuming you release both masses from rest, how much time will it take the 250
a circuit contains six lamps with 60-W bulbs and a heater connected in parallel. the voltage across the circuit is 120 V. what is the current in the circuit when four lamps are turned on?
Find the heat flow during a time period of 5.00 hours through a glass window, whose thickness is 0.15 in. with an area of 35.00 square feet.
A 20,000 kg railway car stands on a hill with its brakes set. The brakes are released, and the car rolls (without friction) down to the bottom of a hill 9.00 m below its original position. It collid
In the deep ocean, a water wave with wavelength 95 m travels at 12 m/s. Suppose a small boat is at the crest of this wave, 1.0 m above the equilibrium position. What will be the vertical position o
If the heavier fragment lands back at the same point from which the shell was launched, where will the lighter fragment land and how much energy was released in the explosion?
A farm truck moves due north with a constant velocity of 11.00 m/s on a limitless horizontal stretch of road. A boy riding on the back of the truck throws a can of soda upward and catches the projec
It was a rainy day and the coefficient of friction was estimated to be 0.42. Use these data to determine the speed of the car when the driver slammed on (and locked) the brakes.