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A 0.1kg ball is attached to a string and whirled around in a circle overhead. The string breaks if the force exceeds 60N. What is the maximum speed the ball can have when the radius of the circle is 1m?
A parallel beam of light containing red (660 nm) and blue (470 nm) wavelengths goes from polystyrene to water, What is the angle between the two colors in water
What is the minimum rate of rotation, in revolutions per minute, required for the spheres to contact the cylinder wall?
The speed of a sound in a container of hydrogen is 201K is 1220m/s. what would be the speed of sound if the temperature were raised to 405K? suppose that hydrogen behaves like an ideal gas.
A boy and girl are balanced on a massless seesaw. The boy has amass of 75kg and the girl has a mass of 50kg. If the boy sits 2metres from the pivot on one side of the seesaw where must the girlsit on the oppsite side.
Two charges q = +8.0 µC are fixed a distance d = 9.0 cm apart. With V = 0 at infinity, what is the electric potential at point C
A railroad car with a mass of 20,000 kg rolls into a second stationary car with a mass of 40,000 kg. How fast was the first car moving before the collision
A 120-V motor has mechanical power output of 2.70 hp. It is 94.0% efficient in converting power that it takes in by electrical transmission into mechanical power. Find the current in the motor
Studies of the relationship of the sun to our Galaxy- The Milky Way - Have revealed that the sun is located near the outer edge of the galatic disc, what is the period of the sun's galactic motion
A 3.3-mC charge is moved through a 150-V potential difference. How much work is required to move the charge
Two positive charges of 7.40 micro-Coulombs are placed on a horizontal surface with a coefficient of static friction 0.72. If they are originally far apart.
A piece of thin spherical shell that has a radius of curvature of 110 cm is silvered on both sides. The concave side of the piece forms a real image 82.5 cm from the mirror. How far was the mirror moved
On The Apollo 14 mission to the Moon, astronaut Alan shepard hit a golf ball with a 6 iron. For how much more time was the ball in flight
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