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A brick is initially 12.10 cm high and an aluminum can is initially 12.11 cm high. By how much should their temperatures be raised in order for the brick and the can to have exactly the similar height?
When an ambulance is stationary, the siren gives off a sound at a frequency of 500Hz. What is the frequency of the stationary siren
q1. imagine a free electron and a free proton held midway between the plates of a charged equivalent plate capacitor.
Assume a man is 2.0 m tall. what is the smallest height a rectangular plane mirror that will allow this man to see all of himself simultaneously? Think about multiple distances from the mirror and make sure you address the Law of Reflection in the an..
a balloon is flat and may be assumed to contain no air. it is then connected via a valve toa tank of air at 300 c
The temperature inside the refrigerator is 2.0 °C. It stands in a kitchen whose temperature is 22 °C, what is the entropy change of the kitchen
Bob, who has a mass of 65 kg, can throw a 600 g rock with a speedof 35 m/s. The distance through which his hand moves as heaccelerates the rock forward from rest until he releases it is 1.0m.
In a parallel plate capacitor, two plates are being discharged by a constant current. Each plate has a radius of 4.0 cm. During the discharging, at a point between the plates at radial distance 2.0 cm from the central axis, the magnetic field has ..
Calculate the fluid force (in Newtons) on a square plate with aside of 2 m that is submerged at ahorizontal angle of 30°. Assumethat the top edge of the plate is located at the surface of the water.
A 3.0-kg cylinder falls vertically from rest in a very tall, evacuated tube 20m above the surface of the earth. what is its kinetic energy just before it hits the earth
If the average velocity of an object is nonzero in some finite time interval, which of the following must be true during this interval? (Select all that apply.)
An object floating in a lake has 15 percent of its volume above the lake surface. What is the density of the object
You are given a container with 25.7 g of hydrogen atoms. What is the total charge on the electrons in the container? what is total charge on protons?
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