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Some birthmarks can be removed by exposure to 585 nm laser light. Pulses are strongly absorbed by hemoglobin in the capillaries in the birthmark, destroying them. A typical laser pulse lasts for 1.5 ms, and contains an energy of 7.0 J.
a. What is the power of the laser pulse?
b. How many photons are in each pulse?
What is the least radius of the circular path? (b) At this radius, what is the force causing the centripetal acceleration of the pilot.
Calculate the force on an airplane which has acquired a net charge of 1450?C and moves with a speed of 150m/s perpendicular to the Earth's magnetic field
A 0.11-kg rubber ball is dropped onto a table. The speed of the ball right before it hits the table is 5.9 m/s. what is the magnitude of the average force exerted on the ball by the table
A copper wire has a 25 m-ohmic resistance at 20 degrees C. When the wire is carrying a current, What is the change in the wire's resistance
A force platform is a tool used to analyze the performance of athletes measuring the vertical force that the athlete exerts on the ground as a function of time. What impulse did the athlete receive from the platform
A charge 2q is located at the origin. A charge -3q is located at x = d, y = 0, z = 0. Where is the electric field zero
An 80 kg person climbs a set of stairs that are 5 meters high. How much gravitational potential energy does she gain
Compute the index of refraction of the gas
A 258-kg log is pulled up a ramp by means of a rope that is parallel to the surface of the ramp. The ramp is inclined at 30.0° with respect to the horizontal. The coefficient of kinetic friction between the log and the ramp is 0.980, and the log has ..
A solid aluminum cylinder with density equal to 2700 kg/m3 has the weight equal to 0.66 N in air and the apparent weight of 0.22 N when immersed in an unknown liquid. What is the density of this liquid
Two point charges q1 = 3.40 nC and q2 = -5.50 nC are 0.100m apart. Point A is midway between them; point B is 0.080 m from q1 and 0.060 m from q2. Take an electric potential to be zero at infinity.
Illustrate which plot best represents the total linear acceleration of the ladybug as a function of time? (t = 0 is the instant the turntable begins to accelerate.)
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