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A 100-g aluminum calorimeter contains 250-g of water. Twosubstances are in thermal equilibrium at 10 degrees celcius. Twometalic blocks are placed in the water. One is a 50-g piece ofcopper at a temperature of 80 degrees celcius. The other sample hasa mass of 70-g and is originally at a temperature of 100 degreescelcius. The entire system stabilizes at a final temperature of 20gegrees celcius. Determine the specific heat of the unknown sample.
q1. an aluminum cup contains 225 g of water and a 40-g copper stirrer all at 27degc. a 400-g sample of silver at an
A thin spherical shell has a radius of 1.70 m. An applied torque of 920 N m imparts to the shell an angular acceleration equal to 6.70 rad/s2 about an axis through the center of the shell. What is the rotational inertia of the shell
What is height of the cliff
Two bicyclists begin to travel clockwise on a circular path of diameter D = 150.00 m with the constant speeds vA = 11.00 m/s and vB = 8.00 m/s, What is the total distance travelled by the pigeon
The magnetic field in a radio wave traveling through air has amplitude 2.5 10-11 T and frequency 2.9 MHz. Find the amplitude and frequency of the electric field
A motorcycle is traveling up one side of a hill and down the other side. Determine the maximum speed that the cycle can have while moving over the crest without losing contact with the road
If the column is 2.30m in length before being stressed, what is the decrease in length
On a workday the average decibel level of a busy street is 65 kb, with 121 cars passing a given point every minute. If the number of cars is reduced to 33 cars every minute on a weekend, what is the decibel level of the street.
A helicopter lifts a 72 kg astronaut 15 m vertically from the ocean by means of a cable. How much work is done on the astronaut by the force from the helicopter
John weighs 716 N, and Marcia weighs 506 N. Estimate the gravitational force between them when they are 0.45 m apart
A visual binary system is at a distance of 5.0 pc. The distance between the two stars subtends an angle of 4.5 arcseconds. What is the mass of each of the stars
A 2.00 nF capacitor with an initial charge of 5.12 µC is discharged through a 1.76 k resistor. What is the maximum current in the resistor
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