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A worker stands still on a roof sloped at an angle of 36° abovethe horizontal. He is prevented from slipping by a staticfrictional force of 460 N. Find the mass of the worker.
A solid ball of mass 2.6 kg and diameter 21 cm is rotating about its diameter at 80 rev/min. what is the new angular speed of the ball
A cart starts from rest at the top of the tilted track. Assume the track is frictionless. The cart passes photogate A moving at speed 5.41 cm/s, Find the magnitude of the acceleration of the cart
After 2.02 days, the activity of a sample of an unknown type radioactive material has decreased to 82.2% of the initial activity. What is the half-life of this material
A resistor is connected to a battery with negligible internal resistance. by what factor does the power dissipated in the circuit change
A hiker's trip consists of three segments. Path A is 7.00 km long heading 60.00 degrees north of east. Path B is 6.00 km long in the direction due east. Path C is 5.00 km long heading 315 degrees counter clockwise from east. Graphically add hiker's d..
A weather emergency siren is mounted on a tower, 177 meters above the ground. On one hand, you would like to make the siren very loud so that it will warn as many people as possible. what is the maximum power that the siren can put out
a uniform electric field has magnitude 260 nc and is directed to the right. a particle with charge 4.3 nc moves along
A 0.8 kg mass is moving in a circle of radius 1.5 m on a flat frictionless table at the end of a string. The speed of the mass is 3 m/s. The string routes through a hole in the center of the table and is held by you underneath the table.
A beetle 4.50 mm long is examined with a simple magnifier of focal length = 11.7 cm. what is the apparent length of the beetle
Steam at 18 MPa and 600 C is contained in a cylinder of volume 0.5 m^3. Calculate the heat rejcted by the steam
What is the velocity of the ice skater after throwing the snowball. avoid friction and air resistance.
A person 1.8 m tall stands 0.74 m from a reflecting globe in a garden. How large is the person's image
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