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A microwave oven is powered with an electron tube called a magnetron, which generates electromagnetic waves of frequency2.75 GHz. The microwaves enter the oven and are reflected with the walls. The standing wave pattern produced in the oven can cook food unequally, with hot spots in the food at antinodes and cool spots at nodes, so a turntable is often utilized to rotate the food and distribute the energy. If a microwave oven intended for utilize with a turntable is instead used by a cooking dish in a fixed position, the antinodes can appear as burn marks on foods such as carrot strips or cheese. The separation distance among the burns is measured to be 5cm ± 5%. From these data, compute the speed of the microwaves.
A construction worker is standing in a 2.6 meter deep hole, 3.1 meter from the side of the hole. Determine how far from the edge of the hole does it land
Two identical rods each of length L and charge Q are perpendicular to each other and separated by a distance D, where the distance D is from the middle of one rod to the nearest tip of the other.
Only two forces act on a 3.0-kg mass. One of the forces is 9.0 N east, and the other is 8.0 N in the direction of 62° north of west. What is the magnitude of the acceleration of the mass
An initially stationary hovercraft sits on a large lake. At time t=0 it accelerates due north at a rate of 1.2 m/s2 for 10 s, what is the velocity of the hovercraft at time t=40 s
An elevator is moving upward with a speed of 11 m/s.Three seconds later, the elevator is still moving upward, but its speed has been reduced to 5.0m/s what is the average acceleration of the elevator during the 3.0 s interval
An RLC circuit has a sinusoidal voltage supplied to it at 632 kHz with a peak voltage of 748 V; a 25 k? resistance; a 16 µF capacitance; and a 30 H inductance
A 25-? resistance is connected in series with a 30-mH inductance and a 12-µF capacitor, obtain the power dissipated in the circuit
A projectile is launched vertically from the surface of the earth with an initial speed of 7.00 km/s. At what height (km) will it stop and begin to fall back to the surface of the earth
On a frictionless horizontal surface a 1.50 kg mass traveling at3.50 m/s collides with and sticks to a 300 kg mass that isinitially at rest. This system runs into an ideal spring forceconstant 50.0 N/cm.
A biker is riding on a level, horizontal road. The coeffients of friction between her tires and the road are µs = 0.76 (static friction) and µk = 0.41 (kinetic friction). The total mass of the bike and biker is 76.5 kg. She is seated so that the n..
In an insulated vessel, 260 g of ice at0°C is added to 630 g of water at19.0°C. What is the final temperature of the system? How much ice remains when the system reaches equilibrium?
a plane flying horizontally at a speed of 50.0 ms and at an elevation of 160 m drops a package. two seconds later it
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