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A microwave oven is powered by an electron tube called amagnetron that generates electromagnetic waves of frequency2.15 GHz. The microwaves enter the ovenand are reflected by the walls. The standing wave pattern producedin the oven can cook food unevenly, with hot spots in the food atantinodes and cool spots at nodes, so a turntable is often used torotate the food and distribute the energy. If a microwave oven isused with a cooking dish in a fixed position, the antinodes canappear as burn marks on foods such as carrot strips or cheese. Theseparation distance between the burns is measured to be5.60 cm. Calculate the speed of the microwaves from these data.
m/s
During a golf drive, the angular velocity of the driver is 20 rad/s just before impact with the golf ball. If the distance from the club head to the axis of rotation is 2.0 m
Four point charges of magnitude 3.9 µC are at the corners of a square of side 3 m. Find the electrostatic potential energy if all the charges are negative
Find out the magnitude of the amount by which the potential difference across the plates changes.
The figure shows two 22.7 kg ice luges that are at rest and placed a short distance apart, one directly behind the other. What are the final speeds of the first luge
an entertainer juggles balls while doing other activities. in one act she throws a ball vertically upward and while it
After fixing a flat tire on a bicycle you give the wheel aspin. what was its average angular acceleration
What is the magnitude of the shell's acceleration just after it is released? What is the speed of the shell at this time
An airplane flies eastward and accelerates uniformly. At one position along its path it has a velocity of 32.3 m/s. Find the airplane's acceleration
A heart defibrillator passes 11.8 A through a patient's torso for 5.00 ms in an attempt to restore normal beating. What was the path's resistance
What would be the required internal diameter of a fluid conductor, assuming no friction losses, if the conductor willbe required to handle a fluid flow of 110 gal/min. At a fluidvelocity of 14.8 ft/sec.
At the tropics, the water close to the surface of the oceanis hotter than the deep water. Would the Second Law ofther modynamics be violated if a machine is been put to operate between these two water levels? Explain.
An object has a velocity 0(t) = (3.00 m/s) + (1.00 m/s) at time t = 0.00 s. The acceleration of the object is (t) = (2.00 m/s3)t + (1.00 m/s4)t2 . If the object is located at 0(t) = (1.00 m) + (-1.00 m) at time t = 0.00 s.
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