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A.) The linear coefficient of thermal expansion for concrete is 12x10^-6 ºC^-1. Consider a slab of concrete which is 4.0 m long at 0.0 ºC. What is the change in length if the temperature is increased to 77 ºF? (Note that a conversion is necessary here). Show your work.
B.) What seems to be the primary safety concern in the lab?
C.) Why should you pay close attention to the dial gauge when the rod is expanding?
A 15-g sample of the candy is placed in a small aluminum container of mass 0.325 kg filled with oxygen, compute the Calorie content of 75g of candy
A physics teacher tells her class that their final project requires the students to measure a specific variable and determine the velocity of a car with no more than 2.5% error. Will Jennifer and Johnny pass their final project
A monatomic ideal gas is held in a thermally insulated container with a volume of 0.06m^3. What volume must the gas be compressed to increase the pressure to 140 kPa
Armed with highly sensitive detection equipment, you are in the front of a railroad car that is accelerating forward. Do you find the light to be red-shifted (lowered in frequency), blue-shifted (increase in frequency), or neither
The disk and the platform go from rest to an angular velocity of 8.5 rad/s in 2.5 seconds. What is the moment of inertia of the disk
a 12.0 g plastic ball is dropped from a height of 2.50 m, How much mechanical energy was lost during the balls fall
A point charge q1=4nC is placed at the origin, and a second point charge q2= -3nC is placed on the x-axis at x= 20 cm. A third point charge q3=2.00 nC is to be placed on the x-axis between q1 and q2.
Even as exploring a sunken ocean liner, principal researcher found the absolute pressure on the robot observation submarine at the level of the ship to be about 413 atmospheres. The density of seawater is 1025kg/m^3.
A fireman, 25.6 m away from a burning building, directs a stream of water from a ground level fire hose at an angle of 39.5° above the horizontal
The altitude of a hang glider is increasing at a rate of 6.80 m/s. At the same time, the shadow of the glider moves along the ground at a speed of 15.5 m/s when the sun is directly overhead. Calculate the magnitude of the glider’s velocity.
Lead has a latent heat of fusion of 2.32x104 J/kg, a specific heat of 128 J/(kg K), and a melting point of 228°C. Calculate heat needed to melt the bullet
At what point the electric potential zero. A sphere of mass 1.9 × 10-4 kg is suspended from a cord. A steady horizontal breeze pushes the sphere so that the cord makes a constant angle of 17° with the vertical. Find (a) the magnitude of that push a..
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