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1. lead has a specific hat of 0.031 cal/gram deg. C. How many calories does it take to raise the temp. of 200 g of lead from 50 deg C to 80 deg C?2. Using the words below approp. explain in significant detail how ice melts, water expands, and finally boils when placed in a pan on a hot stove. (heat energy, temperature, molecular motion, kinetic energy, heat transfer.)
A 15.0 k resistor and a capacitor areconnected in series, and then a 12.0 Vpotential difference is suddenly appliedacross them. Calculate the time constant of the circuit
The pilot of the spaceship measures the length of the moving ship as 30 meters. Establish its length as measured by a person on earth.
Two tugboats pulls a disabled supertanker. Each tug exerts a constant force of 1.80x106 N, What is the total work they do on the supertanker
A rope exerts a constant horizontal force of 250N to pull a 60 Kg crate across the floor.
A pot containing 730 g of water is placed on the stove and is slowly heated from 29°C to 86°C. Calculate the change of entropy of the water
Suppose a capacitor in a video camera has a capacitance of 26.0 ?F, how much potential energy is stored in the capacitor
find the magnitude of the acceleration of the boy. Find the average magnitude of the induced emf if the change in shape occurs in 4.14 s, and the local 0.120 T magnetic field is perpendicular to the plane of the loop.
A stone is dropped from rest into a well. The sound of the splash is heard exactly 1.60 s later. Find the depth of the well if the air temperature is 12.0°C
A piece of Nichrome wire has a radius of 5.0 x10-4 m. It is used in a laboratory to make a heater that dissipates 2.00 x10^2 W of power when connected to a voltage source of 120 V. Ignoring the effect of temperature on resistance, estimate the req..
Transverse waves travel with a speed of 18 m/s in a string under tension of 5 N. What tension is required for a wave speed of 27 m/s in the same string.
The water pressure in the pipes in the basement of a tall house is 5.1 105 Pa. Calculate the water pressure on the second floor
A 4.0-m-long iron bar of uniform cross section is held perpendicular to the wall by a wire from the end of the bar to the wall as shown below. what is the magnitude of the vertical component of force produced by the wall
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