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At an initial temperature of (20 degrees C), a specific heat of (910 j/g degrees C), and a melting point of 660 degrees C. Find the time it takes for the laser to melt the aluminum.
A centrifuge rotor rotating at 14,000 rpm is shut off and is eventually brought uniformly to rest by a frictional torque of 1.60 m·N. If the mass of the rotor is 4.80 kg and it can be approx
If you use the lightbulb in the United States at 120 V (assume its resistance does not change), how bright will it be relative to 45 W 120 V bulbs?
A solid brass sphere of 5.00-mm radius on which there is a positive charge of 800 statC is put in contact with a hollow brass sphere of the same radius on which is a negative charge of 500 statC. T
The other has a magnitude of F2 = 42 N. What is the torque about the axle of the merry-go-round due to the 78 N force?
A rifle is aimed horizontally at a target 51.0 m away. The bullet hits the target 2.30 cm below the aim point. What was the bullet's flight time?
Suppose you have a parallel plate capacitor connected to a 1.5 -V battary. How far apart must the parallel plates be to have an electric field of 1 uV/m between plates?
What is the difference in frequency between the directly radiated waves and the waves reflected from a whale traveling straight toward the ship at 4.95 ? Assume that the ship is at rest in the water
The transducer sensitivity is 0.5 volts/Newton, how large a voltage do you expect to measure? Assume the transducer has been properly zeroed so that V = 0 when F3=0.
A small grinding wheel has a moment of inertia of 4.0×10-5 kg*2. What net torque must be applied to the wheel for its angular acceleration to be 150 rad/s^2?
A golfer imparts a speed of 34.6 m/s to a ball, and it travels the maximum possible distance before landing on the green. The tee and the green are at the same elevation.
John pushes horizontally with an 80.0 N force against a heavy desk, but the desk doesn't move. How much friction force acts horizontally between the desk and the floor?
How close does the alpha particle get to the gold nucleus before turning around? Assume gold nucleus is static and energy is conserved.
Will the ball arrive in time for your team's catcher to make the tag and win the game?
A ball is thrown with a speed of 16 m/s and at an angle of 35 degrees. How high does it go above the cliff to the nearest tenth of a meter?
The second mass is located 40 south of east, and the transducer sensitivity is 0.5 volts/Newton, how large a voltage do you expect to measure?
The bubble rises to the surface, where the temperature is 25 degress C. What is the volume of the air bubble right before it breaks?
A 54.0 kg skateboarder wants to just make it to the upper edge of a "quarter pipe," a track that is one-quarter of a circle with a radius of 3.00 m . What speed does he need at the bottom?
A rocket, weighing 4.36 x 104 N, has an engine that provides an upward force of 8.90 x 105 N. It reaches a maximum speed of 860 m/s. What is the net force?
The mass of the motor is four times the mass of the module. What is the speed (in km/h) of the command module relative to Earth just after the separation?
In the process of removing the remaining portion of the dielectric from the disconnected capacitor, how much work W is done by the external agent acting on the dielectric?
10.0-m-long wire of mass 123g is stretched under a tension of 255N. A pulse is generated at one end, and 20.0 ms later a second pulse is generated at the opposite end. Where will the two pulses firs
Three point masses each of mass m are connected by two thin rods each of mass M and length L. The central mass is at the origin and the z-axis is directed out of the page. Compute the moment of iner
How much energy is stored in the spring bumper when the carts have the same speed?
A proton is initially at rest at a point where the potential is 510 V. Some time later the proton is at a point where the potential is 186 V. If no force other than the electrostatic force acts on t