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Suppose a 2000 Watt laser beam is concentrated by lens a into a cross-sectional area of about 1 x 10^(-6) cm^2. Find the corresponding irradiance and amplitudes of the E (electric) and B (magnetic) fields there.
How high is the top of the ski lift relative to base.
A person of mass 75 kg stands at the center of a rotating merry-go-round platform of radius 3.1 m and moment of inertia 1300 kg ·m2. Calculate the angular velocity when the person reaches the edge
An astronomical telescope has
An ideal gas initially at 324 K is compressed at a constant pressure of 27 N/m2 from a volume of 3.0m3 to a volume of 1.8m3. what is the final temperature of the gas
A small .500 kg object moves on a frictionless horizontal table in a circular path of radius 1 m. The angular speed is 6.28 rad/s. The object is attached to a string of negligible mass that passes through a small hole in the table at the center of..
A short, thin rod of length 2.5 cm has charge distributed uniformly along its length. What is the value of the linear charge density of the rod
Estimate the air pressure at the cloud base from the problem 1 assuming isothermal atmosphere with the average temperature between the cloud base and the surface
A rock of mass 0.340 kg is spun horizontally at the end of a wire that is 1.00 m long and has a diameter of 1.00 mm. what is the Young's modulus of the wire
Consider three resistors with unequal resistances connected in series to a battery. Which of the following statements are true? 1. The current flowing through each of the resistors is the same and is equal to the current supplied by the battery.
questiona car travels all along a straight line at a constant speed of 48.5 mih for a distance d and then another
A spaceship travels past an observer at a speed of 0.6c. What time would the observer record for the same event
A large reflecting telescope has an objective mirror with a 10.0 m radius of curvature. what angular magnification does it produce
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