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Q1. A 10,000 kg railroad car is rolling at 2 m/s when a 400 kg load of gravel is suddenly dumped in. What is the railroad cars speed just after the gravel is dumped in?
Q2. The portrait of St. Matthew from the Lind is farne Gospels describes the union of Early Medieval Christian art and thought. In brief explain that union.
Q3. A metal rod is 25.00 cm long at 26.0 degrees Celsius. When heated to 102.0 degrees Celsius, it is 25.034 cm long. What is the coefficient of linear expansion for this metal?
A 9.15 kg object on a horizontal frictionless surface is attached to a spring with k = 2350 N/m. find the initial potential energy of the block-spring system
An electron has a de Broglie wavelength ? = 7.0×10?10m, What voltage was needed to accelerate it to this speed and What is its speed
Each summer along the Oregon coast there is a contest for archers. People line the beaches and wait for a low-flying airplane to pass overhead loaded with goodies.
A 2kg box slides along a frictionless surface with a speed of 15m/s and approaches a horizontal spring with a spring constant of 2000N/m. If one end is fixed, How far will the spring compress in stopping the box
A rotating wheel requires 6.00 s to rotate 26.0 revolutions. What is the constant angular acceleration (in rad/s) of the wheel
You are on an unknown planet orbiting an unknown star. When the 108 cm long camera is pointed at the star an image is formed that is 1 cm in diameter, what is the diameter of the star
At the instant a ball rolls off a rooftop it has a horizontal velocity component +12.0m/s of and a vertical component (downward) of 10.0m/s, What is the ball's speed as it leaves the roof
A car of mass 960 travels at a speed of 30 along the straight road. The driver sees a red traffic light ahead, and applies brakes. The coefficient of friction between the car tyres and the road is 0.88. Take the acceleration due to gravity to be 9.80..
A magnifying glass has a focal length of 8cm. How close to an object do you need to place the magnifying glass, What type of image is this and what is its magnification
As you bounce a tennis ball of mass 7.70 10-2 kg off a wall, its velocity changes from vx = 10.8 m/s to vx = -8.3 m/s. Find the impulse applied to the ball
q1. a 1035 kg car carrying four 78 kg people travels over a rough washboard dirt road with corrugations 5.0 m apart
Party stores sell small tanks containing 40 g of helium gas. If you use such a tank to fill 0.012 m^3 foil balloons, how many balloons can you expect to fill
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