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At a distance of 5 cm, the microwave radiation from a cellphone has an intensity of 51 W/m2. The maximum permissible radiation leaking out from a microwave oven at the same distance is 10 W/m2. Compare the average electric fields generated by the two devices - how many times stronger is the electric field that is generated by the cellphone than the maximum permissible field leaking from a microwave oven?
A bluetooth headset has an intensity of 0.08 W/m2 at 5 cm distance. If you carry your phone on your belt, 77 cm from the center of your brain, what is the total intensity (headset plus phone) at the center of your brain?
How many times longer than the width of your head (assume 10 cm) is the wavelength of a cellphone transmitting at 1713.4 MHz?
The length of a simple pendulum is 0.86 m and the mass of the particle (the "bob") at the end of the cable is 0.33 kg. The pendulum is pulled away from its equilibrium position by an angle of 9.0 ° and released from rest.
a deuterium nucleus (mass 2.00) moving at 650 m/s collides with a helium nucleus (mass 4.00) moving at 480 m/s in the opposite direction, what percentage of the initial total energy is lost in the collision
a lens that has a focal length of 3.99 cm is used as a magnifying glass.a to obtain maximum magnification and an image
A 2.00-mol sample of a diatomic ideal gas expands slowly and adiabatically from a pressure of 5.02 atm and a volume of 12.8 L to a final volume of 29.0 L. What are the initial and final temperatures
Suppose you have a concave spherical mirror with a focallength of 10 cm. What is the radius of curvature of the mirror
X-ray photons wit a wavelength of .22nm are scattered off free electrons at an angle of 45 degrees. What are the wavelength and the energy of the scattered photons
you swing a 3.16-kg bucket of water in a vertical circle of radius 0.860 m. at the top of the circle the speed of the
A subway train is traveling at 83 km/h when it approaches a slower train 46m ahead traveling in the similar direction at 23 km/h.If the faster train begins decelerating at 2.1 meter per second square while the slower train continues at constant s..
The power supplied to a typical black-and-white television set is88 W when the set is connected to 120V. How much electrical energy does this setconsume in 1 hour?
questionthough 0 is often referred to as lower threshold of human hearing it is important to realize that the human ear
The work needed to remove an electron from the surface of sodium is 2.3eV. Find the maximum wavelength of light
A truck travels 1690 m uphill along a road that makes a constant angle of 4.82? with the horizontal. Find the magnitude of the truck's vertical component of displacement
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