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F2 is pushing directly against the block from the right. F1= 45.0 N and F2 = 25.0 N. What is the horizontal acceleration (magnitude and direction) of the block?
An object weighs 315N in air. When tied to a string, connected to a balance, and immersed in water, it weighs 265N. When it is immersed in oil, it weighs 269N. find the density of the object. Find
If the average force exerted on the arrow by the bow were doubled, all else remaining the same, with what speed would the arrow leave the bow?
A weight is attached to a ring in the center of the rope. Can the man pull the rope to keep it perfectly straight horizontally? Explain the forces acting on the ring.
A 2.60 bullet moving at 270 enters and stops in an initially stationary 2.60 wooden block on a horizontal frictionless surface. What's the speed of the bullet block combination?
FM frequencies range between 88 MHz and 108 MHz (megahertz) and travel at the same speed. What is the range of FM wavelengths?
An open container holds ice of mass 0.590 at a temperature of -10.2. The mass of the container can be ignored. How much time passes before the ice starts to melt?
What are coordinates of the center of mass for the uniform plate shown in the figure below? (x1 = 19 cm, y1 = 13 cm, and y2 = 5 cm. The figure is not shown to scale.)
What frequency will be heard on the other train if the wind is blowing at 30.5 m/s toward the whistle and away from the listener.
A copper strip (n = 8.47 1022 electrons per cubic centimeter) 2 cm wide and 0.07 cm thick is used to measure the magnitudes of unknown magnetic fields that are perpendicular to the strip. Find the
Pressure (p1,p2) respectively. if the valve joining the two vessels is opened, find the temperature inside the vessel at equilibrium?
What is the kinetic energy of an automobile with a mass of 1260 kg traveling at a speed of 12.8 m/s?
An object has a gravitational potential energy of 24 joules when it rests on a shelf 3 m above the ground. What would be its gravitational potential energy when it is lowered to a shelf 1 m above th
A 190 turn square wire coil of area 625 cm2 rotates about a vertical axis at 1880 rev/min, as indicated in the figure below. The horizontal component of Earth's magnetic field at the location of th
A circular arc has a uniform linear charge density of 5 nC/m. The value of the Coulomb constant is 8.98755 * 10^9 N*m^2/ C^2. What is the magnitude of the electric field at the center of the circle
Given the net force acting on a system, an object's mass, and acceleration, how could you calculate the amount of time an object was going to take to slide down an incline?
Describe briefly the measurements you would make to determine the diameter of a piece of copper wire
A sled slides along a horizontal surface for which the coefficient of kinetic friction is 0.25. Its velocity at point A is 8.0;{rm m}/{rm s} and at point B is 5.0;{rm m}/{rm s} Use the impulse-mome
A uniform magnetic field of magnitude B=1.2 teslas is directed toward the bottom of the page in the -y direction.  At time t=0, a proton p in the field is moving in the plane of the p
A hammer that exerts an average force of 500 N on it when it is being driven into a piece of wood. The nail becomes hotter. Calculate the increase in the nail's temperature.
At one instant, a mass (m = 2 kg) is at the location < 0.35, -0.47, 0 >m and attached to one end of a spring with a spring constant ks = 60 N/m and a relaxed length L0 = 0.22 m. The origin is
When viewed from above, concentric bands of red and dark are observed. what does one observe at the exact center of the lens where the lens and the glass plate are in direct contact?
If the coefficient of static friction between the board and the wall is 0.73, what is the least force you can apply and still hold the board in place?
A mass spectrometer applies a voltage of 2.00 kV to accelerate a singly charged positive ion. A magnetic field of B = 0.400 T then bends the ion into a circular path of radius 0.305 m. What is the