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Question1
A diver 60 m deep in 10 Celcius fresh water exhales a 0.5-cm-diameter bubble.
What is bubble's diameter just as it reaches the surface of a lake, where the water temperature is 20^Celcius? Assume that the air bubble is always in thermal equilibrium with the surrounding water.
Question2
A crate is sliding down a ramp that is inclined at an angle of 38 degrees above horizontal. The coefficient of kinetic friction between the crate and the ramp surface is .6. Find out the acceleration of the moving crate.
Question3
A block slides across a surface under the influence of a string attached to one end. When student adds a 1.96 n weight to the top of block, the friction force between block and surface?
The maximum speed of the photoelectrons from a photoelectric experiment with a silver surface (work function: 4.73 eV) is found to be 3.00× 106 m/s
While running, a person dissipates about 0.60 J of mechanical energy per step per kilogram of body mass, how fast is the person running
A gas expands while 502 J of energy is added to it as heat. The expanding gas does 422 J of work on its surroundings.
What is the magnitude of the acceleration of a modified Atwood machine if the mass of the cart is 3 kg and the hanging mass is 4 kg? (Use g = 9.8 m/s2. Express your answer to one decimal point.)
If they are released from rest and allowed to fall toward one another, what is their speed when they first make contact?
From point B, the ball was in the air 2.0 seconds and traveled a horizontial distance of 16.2 meters before hitting the ground. Illustrate with what velocity did the ball leave her hand at point B?
The generator at a power plant produces AC at 29,000 V. A transformer steps this up to 305,000 V for transmission over power lines, how many turns must there be in the output coil
a ball (mass=m) moving in the positive x direction with speed v collides with a block (mass=M) initially at rest, compute the mass of the block
A frictionless pulley has the shape of a uniform solid disk of mass 2.1 and radius 10. A 1.10 stone is attached to a very light wire that is wrapped around rim of pulley and the system is released from rest.
A tourist being chased by an angry bear is running in a straight line toward his car at a speed of 3.7 m/s. The car is a distance d away. The bear is 30 m behind the tourist and running at 6.0 m/s. The tourist reaches the car safely. What is the m..
Two ropes support a load of 253 kg. The two ropes are perpendicular to each other, Find the tension in the second rope
A 1,260-kg car traveling initally with a speed of 25.0 m/s in an easterly direction crashes into the rear end of a 9,600-kg truck moving in the same direction at 20.0 m/s. what is the velocity of the truck right after the collision
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