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Cora lies in a tanning bed getting a tan. Suppose that AS = 0.79 m2 of her skin is exposed to the light from the ultraviolet (UV) lamps. The UV lamps produce light with an average energy density of uT = 5 x 10-6 J / m3. She lies in the bed for tT = 30 minutes. Randomized Variables AS = 0.79 m2 UT = 5 x 10-6 J / m3 tT = 30 minutes Part (a) compute the average intensity ST in W / m2 of the UV light. Part (b) supposes that Cora’s skin absorbs 100% of the energy of the UV light. Calculate how much energy UT in J her skin absorbs during time she lies in the bed. Part (c) computes the rms electric field ET in N/C of UV light. Part (d) computes the rms magnetic field BT in T of the UV light. An antenna with power P = 1.4 x 103 W is radiating spherical electromagnetic waves. Consider a place which is d = 190 m away from the antenna. Randomized Variables P = 1.4 x 103 W d = 190 m 1. Express I in terms of the electric field magnitude Emax, and the speed of light c. 2. Find Emax2 in terms of P, d, and c. 3. Solve for numerical value of Emax in V/m.
Compute the net electric flux through the hull of the submarine. Is the number of electric field lines leaving the submarine greater than, equal to, or less than the number entering it?
if an electron is confined to a region of size 35.2 nm, what is the minimum possible uncertainty in its momentum
A car drives north at 46 for 10 and then turns east and goes 5 at 60. At last, it goes southwest at 30 for 6.0. What is the average velocity.
The gauge pressure in a helium gas cylinder is initially 26atm. What fraction of the original gas remains in the cylinder
Soccer ball is kicked with a speed of 11.50 m/s at an angle of 30.0° above the horizontal. If the ball lands at the same level from which it was kicked, how long was it in the air.
What is the average speed in m/s of nitrous oxide molecule when the temp is 300K? The molar mass of oxygen is 0.032 kg/mol
A 2260 kg satellite used in a cellular telephone network is in a circular orbit at a height of 710 km above the surface of the earth. What is the gravitational force on the satellite
At what average rate does the force from the cable. A falling skydiver has a mass of 54.5 kg. What is the magnitude of the skydiver's acceleration when the upward force of air resistance has the magnitude that is equal to one-fourth of his weight.
The deepest place in all the oceans is the Marianas Trench, where the depth is 10.9 km and the pressure is 1.10×10^8Pa. by how much does its volume decrease
Calculate the electrical potential at the center of the square described as follows: Four charges are placed at the corners of a 20 cm square
Two earthquake waves of the same frequency travel through the same portion of the Earth, What is the ratio of the amplitudes of the two waves
The plates of a parallel plate capacitor are separated by d = 2.8 cm. The potential of the negative plate is 0 V, and the potential halfway between the plates is +15 V. What is the electric field between plates (take the upward direction as the po..
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