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Using the concept of quantum and photons, explain the difference between a 100 W and a 40 W light bulb if they both produce only green light. Answer the following questions in your explanation:
a) Why does the 100 W bulb appear brighter than a 40 W bulb?
b) Why would you expect the 100 W bulb to feel hotter than the 40 W bulb?
c) If 10% of the energy consumed by the bulb produces green light of 500 nm, how many green colored photons does each bulb produce each second? How does this support your explanation of brightness?
A 110 kg ice hockey player skates at 3.0 m/s toward a railingat the edge of the ice and then stops himself by grasping therailing with his outstretched arms. What average force must he exert on the railing
Three resistors with values 1.0 , 2.2 , and 5.5 , respectively, are connected in parallel in a circuit with a 5.0 V battery. What is the total equivalent resistance
A stationary detector sends out a sound wave of frequency 0.315 MHz toward an approaching car. What is the frequency of the waves reflected back to the detector
what is the angular separation between two stars that are barely resolved by the average eye when viewed through a
A fire hose ejects a stream of water at an angle of 30.4 ° above the horizontal. The water leaves the nozzle with a speed of 29.3 m/s. Assuming that the water behaves like a projectile, how far from a building should the fire hose be located to hit t..
Synchrotron radiation takes energy from an accelerator beam and is related to acceleration. Why would you expect the problem to be more severe for electron accelerators than proton accelerators?
an electron with velocity v 1x106 ms is sent between the plates of a capacitor where the electric field is e500 vm. if
A house painter stands 3 m above the ground on a 4.9-m-long ladder that leans against the wall at a point 4.7 m above the ground. find the force of friction that the driveway exerts on the bottom of the ladder
Two 0.65-m-long conducting rods are rotating at the same speed in opposite directions, and both are perpendicular to a 4.8-T magnetic field. what is the angular speed (in rad/s) of the rods when a spark jumps across the gap
An aluminum ball does not fit through a brass ring at 20oC. The diameter of the ball is 2.001 cm, At what temperature does the ball just fit through the ring
Suppose in an experiment you flip a coin twice and observe the sequence (H for heads, T for tails, like HT = a sequence where you observe heads then tails). From the description above, write the collection of outcomes that could occur in this experim..
An ideal gas at 300k has a volume of 15 liters at 15atm. calculate the final volume of the system, the work done by the system, the heat entering or leaving the system, the change in internal energy and the change in the enthalpy when the gas unde..
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