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Calculate the time required to bring all this water from 20°C to 100°C, ignoring any heat losses. (The specific heat of water is 4186 J/kg·K.)
What are the x and y components of the resultant force on the sled assuming the snow is frictionless? What is the magnitude of the acceleration of the sled?
After a tornado, a 0.55-g straw was found embedded 2.6 cm into the trunk of a tree. If the average force exerted on the straw by the tree was 70 N, what was the speed of the straw when it hit the tr
The ions then enter the bending region of a mass spectrometer where the magnetic field is 0.8900 T. Determine the spatial separation between the two isotopes after they have traveled through a half-
A circuit consists of a .025 F capacitor, in series with a 6 ohm resistor, in series with an open switch. How long does it take for the capacitor to lose 10% of its charge?
When you hold a convex (converging) lens in the sunlight over a piece of paper the paper ignites. (a) What is the likely focal length of the lens if it was held 15 cm above the paper?
Your cup of coffee is too hot to drink when served at 85.0..What is the mass of an ice cube, taken from a -15.0 freezer, that will cool your coffee to a pleasant 63.0?
The speed of bullet is measured to be 670m/s as the bullet emerges from a barrel of length 1.16m. Assuming constant acceleration, find the time that the bullet spends in the barrel after it is
An electric heater which draws 17.0 A on a 120-V line. How much power is dissipated in the cord? (answer needs to be W (power)).
A particle moves along the x axis under the influence of a variable force F(x) = 6.6x2 + 3.3x where the force is measured in Newtons and the distance in meters. What is the potential energy associat
A race car can be slowed with a constant acceleration of -14 m/s2. How many meters will it take to stop a car going twice as fast?
A pulley system has an efficiency of 87.5 percent. How much of the rope must be pulled in if a force of 648 N is is needed to lfit a 150 kg desk 2.46 m ?
What would be the tension in the string? Express your answer in newtons and in pounds. What gravitational force would each box of protons exert on the other box?
On a calm, bright day, you're scuba diving in a deep lake (n = 1.34), 6.30 m from your sailboat. When you are 2.70 m below the surface, the top of the sailboat mast appears to you to be in a directi
Compute the impulse that the body receives. How long does a force of 14.0N need to act in order to have the same impulse as before?
Then the bar is dropped. What is the terminal speed at which the bar falls? Assume the bar remains horizontal and in contact with the rods at all times.
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?