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a) Ocean waves move toward the beach with a speed of 8.90 m/s and a crest-to-crest separatiion of 15.0 m. You are in a small boat anchored off shore. At what frequency do the wave crests reach your
What is the magnitude and direction of angular momentum of the teacher plus the turn table after he flips the wheel over. Explain.
A uniform 30kg ladder (length =7.50m) leans against a smooth vertical wall. The base of the ladder is 12 ft from the wall. If the coefficient of friction between the ground and the ladder is 0.20, h
A racetrack has the shape of an inverted cone, as the drawing shows. On this surface the cars race in circles that are parallel to the ground, and the surface is at an angle 31°. For a speed of
Assume that the effects of air resistance were negligible, that the height of the center of gravity was 1.08 m at takeoff, and that the height of the center of gravity at the landing was 0.46 m. How
What magnitude of field is needed to bend these protons in a circular arc of diameter 1.74m?
A cylindrical tank is 50.0 ft deep, 31.0 ft in diameter, and filled to the top with water. A flashlight shines into the tank from above. What minimum angle? Can its beam make with the water surface
Write Newton's law of gravitational force between you (mass m) and the earth (mass ME, radius RE) in the form of an equation.
A copper wire of diameter 2mm carries 12A of current for an electric stove. Assuming the resistivity of copper of 1.7 * 10^(-8) omega.m, the power dissipated in 2 m length of the wire is:
Two capacitors C1=2.5mF and C2=5.0mF are connected in parallel. If a voltage of V=120 volts is applied across the capacitors, what is the energy stored in capacitor C2?
Calculate the launch speed of a projectile that rises vertically above the earth to an altitude equal to one earth radius before momentarily coming to rest. Beware you cannot use the old expression
A 10.5-kg uniform board is wedged into a corner and held by a string at a 50 degree angle. Calculate the tension in the string. Hint: take torques about the corner and assume any length for the boar
The corner opposite to (and most distant from) point P has charge Q = 47 nanocoulomb. The two corners nearer to P have charges +5Q and -4Q, respectively. Assuming that the potential V = 0 at a great
Suppose that at a distance r from this charge, the magnitude of the electric potential and electric field are 74 V and 38 V/m, respectively. How many coulombs of charge, Q, are at the origin?
Consider two identical 70-micro-coulomb point charges, each of 65 mg mass. Let them initially be at rest, 40 cm apart. Suppose they are simultaneously released, and accelerate away from each other w
A 2 -m-long string, fixed at both ends, has a mass of7g. If you want to set up a standing wave in this string having a frequency of318Hz and three antinodes, what tension should you put the string u
Use the Huygens principle to explain how plane parallel wavefronts are diffracted at a single aperture.
What is the smallest radius (in cm) that the conducting sphere could have, and not produce a discharge in the air surrounding it (which has a breakdown strength of 30 kV/cm)?
What will be the minimum lanch speed so that it takes the projectile to infinity (escape speed)?
The refrigerator can convert 30.0 g of water at 22.0oC to 30.0 g ice at -20.0oC each minute. What input power is required? Give your answer in watts.
Alpha particles of energy 9.4 MeV are incident on a silverfoil of thickness 6.8m. For a certain value of the impact parameter, the alpha particles lose exactly one-third of their incident kinetic en
What is the minimum power rating for each of the two speakers for this system so that the speakers are not at risk of being damaged?
What is the magnitude and direction of angular momentum of the teacher plus the turn table after he flips the wheel over. Explain and show picture.
A 10.5-kg uniform board is wedged into a corner and held by a string at a 50 degree angle. Calculate the tension in the string. Hint: take torques about the corner and assume any length for the boa