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The antenna on a cordless phone radiates microwaves at a frequencyof 5.0 GHz. What is the maximum length of the antenna if it is not to exceed half of a wavelength?
cm
An object is solid throughtout. When the object is completely submerged in ethyl alcohol, its appart weight is 15.2 N. When completely submerged in water, its apparent weight is 13.7 N. What is the volume of the object?
A size-5 soccer ball of diameter 22.6 and mass 426 rolls up a hill without slipping, reaching a maximum height of 3.50 above the base of the hill. How much rotational kinetic energy did it then have
An AC generator operates at 22 V and delivers 200 W of power through an ideal (no loss) transformer to the load with the resistance 4.0 \Omega
A mountain climber looks up a slope and sees an avalanche ofboulders accelerating toward her. The boulders are initially60.0m above, moving at an initial speed of 2.00m/s and acceleratingat 4.00m/s^2.
A sound wave with intensity 39 mW/m2 interferes constructively with a sound wave that has an intensity of 12 mW/m2. What is the intensity of the superposition of the two
q1. kelli weighs 417 n and she is sitting on a playground swing that hangs 0.44 m above the ground. her mom pulls the
A blacksmith heats a 1.9 kg iron horseshoe to 480 degree C, then plunges it into a bucket containing 10kg of water at 20 degree C. The specific heat of iron is 447 J/kgK. What is the final temperature.
A metal wire of mass m slides without friction on two horizontal rails spaced a distance d apart.the track lies in a vertical uniform magnetic field B. A constant current i flows from generator G along one rail across the wire and back down the other..
A 0.30 kg mass is suspended on a string. In equilibrium the mass stretches the spring 2.0 cm downward. Calculate the total energy of the system
What are (a) the energy, (b) the momentum, and (c) the wavelength of the photon that is emitted when a hydrogen atom undergoes a transition from the state n = 3 to n = 1?
Ironman is chasing a bad guy who is running at 7.2 m/s. When he is 143m behind the bad guy, How long does it take Ironman to catch the fellow
A balance beam has two clockwise torques applied, 22N @ 5.5m, and 110N @ 2.4 m. Balance is achieved with a 55N force. How far is that force from the balance point
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