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A racetrack has the shape of an inverted cone. On this surface the cars race in circles that are parallel to the ground, and the surface is at an angle 21°. For a speed of30m/s, at what value of
A fighter jet is launched from an aircraft carrier with the aid of its own engines and a steam-powered catapult. The thrust of its engines is 4.83 x 105 N.
An electron was accelerated from rest through a potential difference of 9900 V. What is its speed? The mass of an electron is 9.11 x 10-31 kg, and its charge is 1.602 x 10-19 C. Please show work.
A 2 kg rock, tied to a 3 meter long rope, is spun around in a horizontal circle at 4 m/s. How much work is done on the rock by the rope as it goes around the circle one time at constant speed? (ans
An oscillating LC circuit has a current amplitude of 9.80 mA, a potential amplitude of 276 mV, and a capacitance of 232 nF. What are: (a) the period of oscillation (b) the maximum energy stored in t
If you want to design a centrifuge of diameter1.6m to have a force of127,000 times the force of the Earth's gravity, what is the speed of the outer edge of the centrifuge? Such a device is called a
The wire is in a uniform, horizontal magnetic field of magnitude .4T perpendicular to the wire. A switch connecting the wire to a battery is closed and the wire is shot upward, rising to a max heigh
Find the magnitude of the magnetic field midway between two long straight wires 8.80 cm apart when their currents are I1= 11.50 A and I2= 19.00 A that each one carries. What is the magnitude of the
A force P is applied to the bar as shown. This causes point A to have acceleration 3.6 m/s2 to the right and the bar to have an angular acceleration 6 rad/s2 counter clockwise. Determine the acceler
Determine the electric potential at the position of one of the particles, due to the other two particles in the triangle?
The results of a ballistic pendulum measurement are as follows: Calculate the initial velocity of the ball, v.
At what radius (a) inside and (b) outside the capacitor gap is the magnitude of the induced magnetic field equal to half of its maximum value? State your answer in terms of R.
A worker uses a cart to move a load of bricks a distance of 10 m across a parking lot. If he pushes the cart with a constant force of 209 N, what amount of work does he do? Show your work.
Explain the important difference between classical and quantum particles. Discuss the requirements that determine whether a particle obeys Bose-Einstein or Fermi-Dirac statistics.
The block is originally rotating in a circle of radius 35 cm with angular speed 0.90 rad/s. The string is then pulled from below until the radius of the circle is 20 cm. You may treat the block as
A flight attendant at an airport is towing her 80 N-suitcase at a constant speed by pulling on a strap with a 40N a an angle 57 above the horizontal. She pulls the back 300m across the floor. Find t
The boxes slide horizontally across a ramp of unknown kinetic coefficient of friction, coming to rest over a distance of 15m where a worker picks them up. What is the speed of the boxes at the botto
If you require the wavelength of electron-beam for an electron microscope which is 10 times shorter than that in the part (a) what should be the energy of electrom beam? How can such energy be inpar
The Child can push with a constant force of 3.20N. Use the Work-Kinetic Energy Theorem to find the speed of the car at the end of a 1.50m push.
A proton experiences an electric force of 95.2 fN (1 fN = 1 fem to newton = 1E-15 N) in a uniform electric field. How strong is the electric field (in N/C)?
Calculate the work (in J) required to move the test charge to a point 6.7 cm closer to either of the charges.
A small, 2.00-mm-diameter circular loop with R = 1.1x10^-2 ohms is at the center of a large 120-mm-diameter circular loop. Both loops lie in the same plane. The current in the outer loop changes fro
If the original frequency is held constant and the tension in the wire is increased by a factor of 9, how many loops are present in the new pattern?
A bug standing on the axis decides to crawl out to the other end of the rod. When the bug (whose mass is 5 x 10-3kg) gets where it's going, what is the change in the angular velocity of the rod?
Determine the rates of radiation heat transfer between this person and the surrounding surfaces in both summer and winter if the exposed surface area, emissivity, and the average outer surface tempe