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Question: A new cordless phone emits 2.9mW at 5.8 GHz. The manufacturer claims that the phone has a range of 100 feet.
Part A: If we assume that the wave spreads out evenly with no obstructions, what is the electric field strength at the base unit 100 feet from the phone?
Show all work, use additional paper if necessary.
300 J of work are done to compress the gas as, in the same process, 1200 J of heat energy are transferred from the gas to the environment. Afterward, what is the rms speed of the molecules.
A 0.99-cm-diameter microscope objective has a focal length of 2.6 mm. It is used in visible light with a wavelength of 532 nm. What is the objective's resolving power if used in air
An automobile and a truck start from rest at the same instant, with the automobile initially at some distance behind the truck. What is the speed of the truck when they are abreast
An electron moves through a uniform electric field = (2.30 + 4.90) V/m and a uniform magnetic field = 0.400 T. Determine the acceleration of the electron when it has a velocity = 12.0 m/s. ax = m/s2 ay = m/s2 az = m/s2
A child on a sled starts from rest at the top of a 15.0° slope. If the trip to the bottom takes 17.3 s how long is the slope? Assume that frictional forces may be neglected
A certain ship is shaped like a box, with vertical sides and a flat bottom. When the ship sails with cargo in the ocean (saltwater), Find the mass of the ship without the cargo
An insulating rod of length 14.0 cm is bent into the shape of a semicircle and has a uniform total charge of -7.5 uC, Calculate the magnitude and direction of the electric field at the center of the semicircle arc
a 1.8-g balloon is filled with helium gas. when a mass of 4.8 g is attached to the balloon the combined mass hangs in
A freezer has a coefficient of performance of 2.40. The freezer is to convert 1.98kg of water at 26.0 oC to 1.98kg of ice at -5.00 oC in 1 hour. How much wasted heat is rejected to the room in which the freezer sits
A car sits in an entranceramp to a freeway, waiting for a break in the traffic. What is the acceleration of the car
Now a peg is placed 4/5 of the way down the pendulum's path so that when the mass falls to its vertical position it hits and wraps around the peg. As it wraps around the peg and attains its maximum height it ends a distance of 3/5 L below its startin..
The focal length of the eyepiece of a certain microscope is 19 millimeter. Find the overall angular magnification of microscope
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