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Q1. What happens to a contracting cloud when its thermal energy can no longer escape cloud's interior in the form of photons? How does the trapped thermal energy affect the process of star formation?
Q2. A gas expands from I to F. The energy added to the gas by heat is 442 J when the gas goes from I to F along the diagonal path. What is the change in internal energy of the gas?
Respond in units of J
Q3. Tarzan (m = 85 kg) tries to cross a river by swinging from a 10.0 m long vine. His speed at the bottom of the swing, just as he clears the water, is 9.0 m/s. Tarzan doesn't know that the vine has a breaking strength of 1.0 103 N. What is the total force Tarzan excretes on the vine?
After the collision (assumed elastic), the second ball is moving along the positive y axis. Elucidate the final direction of the first ball, and what are their two speeds?
A small coin, initially at rest, begins falling. If the clock starts when the coin begins to fall, what is the magnitude of the coin\'s displacement
A sphere with radius 0.205m has density ? that decreases with distance r from the center of the sphere according to ?=3.25×103kg/m3?(9.25×103kg/m4)r, calculate the moment of inertia of the sphere for an axis along the diameter
A generator has a square coil consisting of 600 turns. The coil rotates at 66 rad/s in a 0.32 T magnetic field. What is the length of one side of the coil
A 3.9 kg block originally at rest is pulled to the right along a horizontal, frictionless surface by a constant, horizontal force of 18 N.
The drawing shows a collision between two pucks on an air-hockey table. Puck A has a mass of 0.020 kg and is moving along the x axis with a velocity of +5.5 m/s. Find the final speed of puck A
If the gauge pressure of the blood at your heart is 13.25 kPa and your body doesn't compensate, what would the pressure be at your head, 57.4 cm above your heart
A spring oscillator is designed with a mass of 0.258 kg. It operates while immersed in a damping fluid, selected so that the oscillation amplitude will decrease to 1.00% of its initial value in 8.34 s
Consider a charge of +1 nC (nanocoulombs, or Coulombs ×10?9) at (-3, -4) m, and a charge of -2 nC at (12, -5). Calculate the electric field strength at the origin
A block with mass m = 4 kg is sitting on the ground and not moving. The acceleration due to gravity is g = 9.81 m/s2. Please answer the following questions.
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 .
A pitot tube on the nose of an airplane measures a stagnation pressure of 2.5 atmospheres. what is the speed of the airplane
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