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The heating element has a resistance of 5.2 and carries a current of 25 A. The cost of electricity is $0.10/kWh. Find the monthly cost of running the furnace.
The magnitude FN of the normal force that each side of the tread channel exerts on the stone is 1.8 N. Assume that only static friction supplies the centripetal force, and determine the radius r of
Two sound sources radiating in phase at a frequency of 485 Hz interfere such that maxima are heard at angles of 0 and 22° from a line perpendicular to that joining the two sources. Find t
The press box at a baseball park is 31.0 ft above the ground. A reporter in the press box looks at an angle of 20.0 degree below the horizontal to see second base. What is the horizontal distance fr
The force suddenly increases to 15 N and acts for one more second. What impulse was imparted by these forces to the object?
When you lift a bowling ball with a force of 83 , the ball accelerates upward with an acceleration . If you lift with a force of 91 , the ball's acceleration is 2.
begins to run on the disk in a circular path and has a tangential speed of 3.10 m/s relative to the ground. Find the resulting angular speed (in rad/s) of the disk.
a stick of mass m and length L is at rest with the angle 60 toward to horizontal , with its tip on a frictionless table . its released . determine the speed of its center of mass when the stick has
An observer intercepting the light transmitted by the film sees 14 bright and 13 dark fringes along the length of the film. By how much does the film thickness change over this length?
How much more time is required for light to pass through this double layer than is required to traverse the same distance in air.
What is the impulse delivered by the bat? If the bat and softball are in contact for .80 milliseconds, what is the average force that the bat exerts on the ball?
It is observed that the oscillator that generates the wave completes 38.0 vibrations in 25.0 s. Also, a given maximum travels 426 cm along the rope in 10.0 s. What is the wavelength?
A hockey puck just clears the 2.00-m high boards on its way out of the rink. Given the launch angle of the puck (-), outline a strategy that you can use to find its initial speed Vo.
The magnitude of vector is 29.0 units and points in the direction 334° counterclockwise from the positive x-axis. Calculate the x-component of this vector.
At high noon, the Sun delivers 1125 W to each square meter of a blacktop road. If the hot asphalt loses energy only by radiation, what is its equilibrium temperature?
An antelope moving with constant acceleration covers the distance 73.0 m between two points in time 7.00 s. Its speed as it passes the second point is 14.7 m/s.
At the bottom of the circle, his speed is twice the value calculated in part (a). What is the magnitude of the normal force exerted on the motorcycle by the sphere at this point?
Where Q is the polar angle measured counter-clockwise from the + x-axis in radians, and r is the distance from the origin in m. Calculate the y-coordinate of the particle at the time 2.20 s.
A sound wave moving through water has a frequency of 256 Hz and a wavelength of 5.77 m.What is the speed of sound in water?
Its density is 8890 kg/m3. The student finds that the time for the pulse to travel from one end to the other is 1.56 × 10-3 s. How long is the rod?
A football player runs directly down the field for 24 mbefore turning to the right at an angle of 30 from his original direction and running an additional 17 m before being tackled. What is the mag
A constant frictional force of 0.035 N exists between barrel and projectile. How high does the projectile go if the spring was compressed 5.0 cm for this launch?
A 0.40-kg block initially at rest on a frictionless horizontal surface is acted upon by a force of 3.0 N for a distance of 4.5 m. How much kinetic energy does the block gain?
A superhero flies 135 m from the top of a tall building at an angle of 30 below the horizontal. What is the horizontal component of the superhero's displacement?
Electromagnetic waves with a wavelength of 215 nm strike the surface and eject electrons. Find the maximum kinetic energy of the ejected electrons. Express your answer in electron volts.