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Q1. Brass is an alloy made from copper and zinc. A .59 kg brass sample at 98 C is dropped into 2.8 kg of water at 5 C. If the equilibrium temperature is 6.8 C, what is the specific heat of the brass?
Q2. Eight lights are associated in parallel to a 105 V source by two leads of total resistance 2.3. If 240 mA flows during each bulb, what is the resistance of each?
Q3. A 65Kg ice skater pushes off his partner and accelerates backwards at 1.3m/s^2. If the partner accelerates in the opposite direction at 2.0m/s^2, what is mass of the other skater?
One displacement vector A has magnitude of 2.78 km and point due north. Another displacement vector B has a magnitude of 7.40 km and also points due north. Provide diagrams and calculate the magnitude and direction of A+B, B-A, A-B.
Imagine that plane reaches the necessary takeoff velocity
It's found that string is set into oscillation only at the frequency 880 Hz and 1320 Hz as the frequency of an oscillator is varied over the range 500-1500 Hz. What is the tension in the string.
Find the mans rate of sweat production
Compute the amplitude and phase at the observation screen
Write down the original position of the system
What is mass of the ice cube
What is used up electric potential energy of charge carriers
Evaluate the electrostatic energy of two opposite charges
What horizontal force acts on the puck after the push
Write down the expression for net torque
Potassium iodide has an interplanar spacing of d = 0.296 nm. A monochromatic X-ray beam shows first-order diffraction maximum while the grazing angle is 7.8°. Compute the X-ray wavelength λ .
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