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A railroad car with a mass of 15 400 kg collides and couples with a second car of mass 18 500 kg that is initially at rest. The first car is moving with a speed of 7 m/s prior to the collision.
If external forces can be ignored, what is the magnitude of the final velocity of the two railroad cars after they couple?
an electric toaster operating on 104.6 volts draw a current of 9.1 amps. what is the resistance of the toaster
If the converging lens in a slide projector has a focal length of 104.00 mm and the slide is located 109 mm from the lens, Determine the dimensions of the image of the slide
a what is the tangential acceleration of a bug on the rim of a 12.0-in.-diameter disk if the disk accelerates uniformly
Discuss the humidity in an air conditioned room and in a heated room in the winter. Why must we use a dehumidifier and humidifier? If the outside temperature is 41o F and room temperature is 68o F should we utilize dehumidifier why or why not
A small 0.500-kg object moves on a frictionless horizontal table in a circular path of radius 1.00 m. The angular speed is 6.28 rad/s. The object is attached to a string of negligible mass that passes through a small hole in the table at the cente..
The drawing shows an edge-on view of the solar panels on acommunications satellite. The dashed line specifies the normal tothe panels. Sunlight stikes the panels at an angle with respect to the normal.
A toroidal solenoid has a mean radius of 18.00 cm and a cross-sectional area of 3.00 cm^2, What is the mutual inductance of these coils
A skier starts from rest at the top of a 48 m hill, skis down a 32° incline into a valley, and continues up a 28 m high hill. How fast is the skier moving at the bottom of the valley
A glass surface (n = 1.65) has a layer of water (n = 1.33) on it. Light in the glass is incident on the glass-water interface. Find the critical angle for total internal reflection
We can roughly model a gymnastic tumbler as a uniform solid cylinder of mass 70.0kg and diameter 1.00m . A) If this tumbler rolls forward at 0.550 rev/s, how much total kinetic energy does he have? B) What percent of his total kinetic energy is ro..
How many subjects will be in the experimental and control groups and What is the dependent variable in the study? How will it be measured? How many times will it be measured?
A diver makes a running horizontal jump off a cliff located 4m above the water level below. How fast must the diver is traveling at launch
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