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The illuminance of direct sunlight on Earth is about 105 lm/m2.
(a) Calculate the luminous flux of the Sun.
(b) Calculate the luminous intensity of the Sun.
When laser light of wavelength 633.4nm passes through a diffraction grating, the first bright spots occur at 17.8 degrees from the central maximum. At what angles do the third bright spots occur
A bird watcher meanders through the woods, walking 0.261 km due east, 0.315 km due south, and 1.74 km in a direction 72.5 ° north of west. find the magnitudes of the bird watchers average velocity
Two cars are traveling along a straight line in the same direction, the lead car at 25.2m/s and the other car at 31.0m/s. At the moment the cars are 41.9m apart, the lead driver applies the brakes, causing her car to have an acceleration of -2.07m..
If a force of 300N is exerted upon a 60 kg mass for 3 seconds, how much impulse does the mass experience
what is the coefficient of thermal expansion for a substance that was originally 2 m long at 20 degrees C and expants to 2.0002 m at 40 degrees C
A rocket, initially at rest on the ground, accelerates straight upward from rest with constant acceleration 34.3m/s2. Find the maximum height ymax reached by the rocket
A town is planning on using the water flowing through a river at a rate of 5.0 x 106 kg/s to carry away heat from a new power plant, What is the maximum power this plant can produce
A capacitor with 10 microfarad capacitance is connected in series with a resistor of 2.5 mega-ohms. If this capacitor is charged to 4 volts, and the circuit is closed, how many seconds will pass before the voltage drops to 1 volt?
A metallic sphere 1 of radius 1.00 cm is far away from a metallic spherical shell 2 of radius 2.00 cm. What is the initial voltage on 1
You have a 12 oz cup of coffee at 180 degrees F. you add 2 ounces of cold water at 40 degrees F. What is the tempertaure of the coffee?
Starting from one oasis, a camel walks 25 km in a direction of 30 degrees south of west and then walks 30 km toward the north to a second oasis. What is the direction from the first oasis to the second oasis?
Imagine you have two 2.5 m long wires running parallel to each other (separated by 1.0 cm) carrying 200 mA currents. What is the magnetic force of one wire on the other if (a) the currents are both running in the same direction
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