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What is the magnitude and direction of the impulse imparted by the floor to the ball?
A 54.0 g ice cube, initially at 0°C, is dropped into a Styrofoam cup containing 375 g of water, initially at 21.2°C. What is the final temperature of the water, if no heat is transferred
A pendulum has a length of 0.3 meter and the acceleration of gravity is 9.8 m/s squared. Use the formula T = 2p vl/g to find the following values: the period of the pendulum
If the linear coefficient of expansion of the wood is 6.0 x10-5(C°)-1, at what temperature would the door begin to touch the side of the doorway?
The distance between two successive maxima of a transverse wave is 1.20m. Eight crests, or maxima, pass a given point along the direction of travel every 12.0s. Calculate the wave speed.
A car with a total mass of 1.92*10^3 kg has wheels of radius 31.0 cm and moment of inertia 0.830 kg · m2. What is the car's translational kinetic and rotational energy when the car is moving at
Find the energy stored in the inductor when the current reaches its maximum value. Find the energy stored in the inductor one time constant after the switch is closed.
A spring has a spring constant of k = 7.500N/m. If the spring is displaced 0.5500 from its equilibrium position, what is the force that the spring exerts?
An old professor uses a converging lens with focal length 28 cm to view a coin 16 cm in front of the lens. What is the magnification?
How far from a 51.4 mm focal-length lens must an object be placed if its image is to be magnified 2.50 and be real?
If you pass current through a standard coiled spring, what happens to the spring? Will it expand as if pulled, contract as if compressed, or remain in its given state?
What fraction of the power radiated by the sun is intercepted by the planet Mercury? The radius of Mercury is 2.44 x 106 m, and its distance from the sun at the moment is 5.80 x 1010 m. Assume that th
Assume the density of air is 1.29 kg/m3 and the density of helium is 0.179 kg/m3. Draw a force diagram for the balloon.
A 1.60 kg mass is attached to a light cord that is wrapped around a pulley of radius 6.80 cm, which turns with negligible friction. The mass falls at a constant acceleration of 2.25 m/s2. Find the m
A proton is released from rest in a uniform electric field of magnitude 385 N/C. Find (a) the electric force on the proton, (b) the acceleration of the proton, and (c) the distance it travels in
A 2.1 kg body oscillates in SHM on a spring that, when extended 2.3 mm from its equilibrium position, has an 10 N restoring force. What are (a) the angular frequency of oscillation, (b) the period o
What are (a) the angular frequency of oscillation, (b) the period of oscillation (in ms), and (c) the capacitance of an LC circuit with the same period if L is 7.5 H?
The block swings ina n arc, rising 8 mm above its lowest point. What is the kinetic energy of the bullet just before it hits the block?
The secondary voltage of an ignition transformer in a furnace is 14.5 kV. When the primary operates at an rms voltage of 100 V, the primary impedance is 23.3 O and the transformer is 91.9% efficient
If it is traveling north at 34 m/s through a magnetic field with vertical component of 30 µT, what magnitude emf is induced between the driver and passenger sides of the truck?
A 150 ohm combination of resistors draws 2 mA of current when connected across a battery. If you now add a 1 ohm resistor in series with this combination, there will be hardly any change in the curr
A wire has a current density of 17 A/mm2. If the drift velocity is 4.8×10-8 m/s, how many free electrons does the wire have in a 1.0 m length? The radius of the wire is 1.0 mm.
A wire 2.0mm in diameter and 4cmlong is connected to a 12V battery. If the resistivity of the wire is 3.5 x 10^-5 ohm-m; calculate the resistance of wire and its current?
An electron moving with a velocity of 2.7 x10^6 m/s in the positive x direction enters a region where there is a uniform 4.3 T magnetic eld at angle of 45 with the x-axis.
Suppose you have two positive point charges and want to move them closer together. To do the least amount of work, you should move them directly toward each other; any other path will require more w