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If a 600 kg car is moving with a speed of 25 m/s, that what is its kinetic energy? State your answer in Joules. What is its momentum? What are the correct units of measurement for momentum?
A bullet of mass 7.7 g is fired into aninitially stationary block and comes to rest in the block. The block, of mass 1.21 kg, is subject to nohorizontal external forces during the collision with the bullet.After the collision, the block is observe..
On a banked race track, the smallest circular path on which cars can move has a radius of 124 m, while the largest has a radius of173 m. The height of the outer wall is 11.8 m. Find(a) the smallest and (b) the largest speed at which cars can move on ..
A centrifuge is a device in which a small container of material is rotated at a high speed on a circular path. Such a device is usedin medical laboratories, for instance, to cause the more dense redblood cells to settle through the less dense bloo..
When electrons are moving from right to left in a conducting wire, the electric field is directed to ward the right. Electric current is a vector quantity.
Current density is a measure of the amount of current flowing through a volume. The conventional direction of current is the hypotheticaldirection of movement of positive charges through the wires of anelectric circuit. Through a certain cross-sectio..
A 55.4 g arrow traveling at 64.7 m/s hits a bale of hay and stops after entering 0.37 m into the hay. Assuming constant acceleration, find the magnitude of the force in N by the bale on the arrow.
Estimate the rms electric field in the sunlight that hitsMars, knowing that the Earth receives about 1350 W/m2 and that Mars is 1.52 times farther from the Sun (on average) th anis the Earth.
Four 1.2 kg masses are located at thec orners of a square 0.80 m on eachside. Find the magnitude and direction of the gravitational forceon a fifth 1.2 kg mass placed at the midpoint of the bottom side of the square.
Calculate the final velocity of the electron beam in a CRT as itimpinges upon the screen if the voltage between the anode and thecathode is 24 [kV] and they are spaced by 0.4[m].
The ammonia molecule NH3 has a permanent electric dipole moment equal to 1.47 D, where 1 D = 1 debye unit = 3.34 x 10-30 C-m. Calculate the electric potential in volts due to an ammonia molecule at a point 65.0 nm away along the axis of the dipole. (..
A 100 kg block is pulled at a constant speed of 7.4 m/s across a horizontal floor by an applied force of 132 N directed 37° above the horizontal. find the rate at which the force does work on the block
A dock worker applies a constant horizontal force of 80.5 N to a block of ice on a smooth horizontal floor. What is the mass of the block of ice
A certain molecule has a dissociation energy of 4.69 eV. What is the minimum frequency photon that can dissociate it in PHz (peta Hz, 1015 Hz) to two decimal places
Find the distance(in μm) between the plates of a parallel plate capacitor if, in the dielectriccompletely filling that region, an electric field of magnitude 67.5MV/m gives a potential difference of 34.5 kV between the plates
A supertanker filled with oil has a total mass of 11.7·108 kg. If the dimensions of the ship are those of a rectangular box 209 m long, 81.7 m wide
Since the vehicles stick together after the collision and take the direction of the large truck (greater momentum), I guessed that the small car would have a greater change in kinetic energy.
A train is travelling up a 3.2 degree incline at a speed of 3.25 m/s when the last car breaks free and begins to coast. How long does it take for the last car to come to rest.
Consider a simple pendulum with L = 2.4 m and m = 1.8 kg. Suppose the mass is initially at rest at the lowest point on its trajectory when it is given an impulse such that it then has a velocity of 0.17 m/s. What is the total mechanical energy of the..
you are to establish a procedure for measuring the radioactivity of samples placed in a counter. the calibration of the
an ideal gas is at 30 degrees c. the gas is cooled reducing the thermal energy by 20.what is the new temperature in
nitrogen dioxide is formd in the following reaction n o2 no2 the equilibrium constant k at 25 c is
A hotel elevator ascends 190 m with a least speed of 4.0 m/s. Its acceleration and deceleration both have a magnitude of 1.4 m/s2.
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