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You are standing 1.20 m from a 1,600-W heat lamp. Part 1:
(a) Assuming that the energy of the heat lamp is radiated uniformly in a hemispherical pattern, what is the intensity of light on your face? W/m2 Part 2:
(b) If you stand in front of the heat lamp for 2.00 minutes, how much energy is incident on your face? (Assume your face has a total area of 2.8 × 10-2 m2.) J Part 3 out of 3
(c) What are the rms electric and magnetic fields? Give answer with scientific notation.
If the spring of a jack-in the-box is compressed, a distance of 8.00cm from its relaxed lenght and the released, what is the speed of the toy head is 50.0g the spring constant is 80.0N/m, and the toy head moves only in the vertical direction.
A 15.0g rubber bullet hits a wall with a speed of 180m/s. What is the direction of the change in momentum of the bullet
a 4-g bullet is fired into a 1.5-kg block that is resting on a frictionless surface and is attached to a spring with
Three air carts have masses, 4m,2m and m. the most massive cart hasan initial speed of Vo; the other two carts are at restinitially. All carts are equipped with spring bumpers that giveelastic collisions.
Your personal stereo is in a dead spot caused by direct reception from an FM radio station at 92.5 MHz interfering with the signal reflecting off a wall behind you
Canadian geese migrate essentially along a north-south direction for well over a thousand kilometers in some cases, How long will it take the bird to cover a ground distance of 500km from north to south
As a hiker in Glacier National Park, you are looking for a way to keep the bears from getting at your supply of food. What will be the acceleration of the bags when you let go of the anchor bag
sometimes a person cannot clearly see objects close up or far away. to correct this type of vision bifocals are often
A galvanometer has a coil resistance of Rgalv = 89.7 ?. It is to be made into an ammeter with a full-scale deflection equal to I = 2.35 A. If the galvanometer deflects full scale for a current of Igalv = 135 mA, what size shunt resistor should be use..
Two ice skaters, with masses of 54 kilogram and 70 kilogram, are at the center of a 50 meter diameter circular rink. find how long does it take lighter skater to reach edge
What magnitude force is needed to give a helicopter of mass M an acceleration of 0.10 g upward? (b) What work is done by this force as the helicopter moves a distance h upward?
What is the electric field amplitude of an electromagnetic wave whose magnetic field amplitude is 2.0 mT
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