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A hot iron horseshoe (mass=0.45 kg), just forged is dropped into 1.64 L of water in a 0.35-kg iron pot initially at 20 degree celsius. If the final equilibrium temperature is 24.0 degree cesius, es
What are the (a)x-component and (b)y-component of the velocity of the third part? (c) How much energy is released in the explosion? Ignore effects due to the gravitational force.
"Three equal point charges, each with charge 1.55 , are placed at the vertices of an equilateral triangle whose sides are of length 0.350 . What is the electric potential energy of the system? (Take
Automobile traveling along a straight road increases its speed from 61 ft/s to 79 ft/s in 180 ft. What is their acceleration over this 1.2 cm
A 20.0 wood ball hangs from a 1.10 -long wire. The maximum tension the wire can withstand without breaking is 600 . A 0.900 projectile traveling horizontally hits and embeds itself in the wood ball.
Two equally charged, 1.00 g} spheres are placed with 2.00 {cm} between their centers. When released, each begins to accelerate at 225 {m/s^2}. What is the magnitude of the charge on each sphere?
A 0.350 kg mass is attached to a spring and executes simple harmonic motion with a pe- riod of 0.300 s. The total energy of the system is 6.00 J. Find the maximum speed of the object. Find the force
A spring has a force constant of 323 N/m and an unstretched length of 6 cm. One end is attached to a post that is free to rotate in the center of a smooth table, as shown in the top view below. The
A rocket is launched at an angle of 51.0° above the horizontal with an initial speed of 104 m/s. The rocket moves for 3.00 s along its initial line of motion with an acceleration of 31.0 m/s2. A
The tension in a wire clamped at both ends is increased by a factor of 4.45 without appreciably changing the wire's length between the clamps. What is the ratio of the new to the old wave speed for
To recharge a 10 V battery, a battery charger must move 3.6 105 C of charge from the negative terminal to the positive terminal. How much work is done by the charger?
The pressure in a constant-volume gas thermometer is 0.993 atm at 100?C and 0.4 atm at 0?C. What is the temperature when the pressure is 0.618684 atm?
You drive a car 1490 ft to the east, then 2503 ft to the north. If the trip took 3.00 minutes, what was the direction? Give the angle counterclockwise relative to the east.
A full tank of oxygen (O2) contains 16.1 kg of oxygen under a gauge pressure of 36 atm. Determine the mass of oxygen that has been withdrawn from the tank when the pressure reading is 30 atm. Assume
How much positive charge and how much negative charge are on the protons and electrons in a cup of water (0.25kg)? What is the magnitude of attractive force exerted by the electrons in the cup of wa
How long are her feet in the air? What is her highest point above the board? What is her velocity when her feet hit the water?
If the flagpole has a mass of 15 kg and length 10 m and the angle the cable makes with the pole is ? = 47°, what are the magnitude and direction of the force exerted by the hinge on the flagpol
What is the electron's acceleration in the field? What is the electron's velocity when its x coordinate has changed by 1.3 cm?
A spring of negligible mass has force constant k= 1700 . How far must the spring be compressed for an amount 3.10 J of potential energy to be stored in it?
If light passes through a 0.050 mm slit and is projected on a screen 0.70 m away with 8.0 mm between the central bright band and the first dark band, what is the wavelength of the light?
A basketball player grabbing a rebound jumps 76.0 cm vertically. How much total time (ascent and descent) does the player spend in the top 15.0 cm of this jump.
A hollow cylindrical conductor has an inner radius a = 1.4 cm and an outer radius b = 4.7 cm. The total current through the cylinder is 90 A. Using Ampere's Law, calculate the magnetic field at
two ants race across a table 50cm long. one travels at 4cm/s and the other at 3cm/s. when the first one a crosses the finish line, how far behind is the second one .
The distance between two telephone poles id 50.0m. When a 1.00-kg bird lands on the telephone wire midway between the poles, the wire sags 0.200m. draw a free-body diagram of the bird. How much ten
What is the minimum thickness of a soap bubble film (n = 1.38) on which light of wave length 610 nm shines, assuming one observes constructive interference of the reflected light?