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A 110 kilogram horizontal beam is supported at each end. A 320 kilogram piano rests a quarter of the way from one end. Determine the vertical force on each of the supports?
Technetium-99 has an excited state that decays by emission of a gamma ray. The half-life o fthe excited state is 360 min. What is the activity, in curies, of 1.00mg of the excited isotope
Some bacteria are propelled by motors that spin hair-like flagella.A typical bacterial motor turning at a constant angular velocityhas a radius of 1.9x10-8m, How long does it take the motor to make one revolution
A scout troop is practicing its orienteering skills with a map and compass. First they walk due east for 1.2 km. Next,they walk 35 degrees west of north for 3.5 km. How far and inwhat direction must they walk to go directly back to their startingp..
The cosmic background radiation permeating the universe has the spectrum of a 2.7 K thermal radiator. What is the peak wavelength
A laser beam aimed from the earth is swept across the face of the moon. a. If the beam is rotated at an angular velocity of 1.55*10^-3 rad/s , what is the angle of divergence of the laser beam
A 20kg box slides up a 12m long incline at an angle of 30 degrees with the horizontal. What is the change in gravitational potential energy
A large truck collides head-on with a small car. how do the forces acting between the truck and car compare during the collision
Unpolarized light of intensity I0 is incident on three polarizing filters. The axis of the first is vertical, What light intensity emerges from the third filter
a garden hose is attached to a water faucet on one end and a spray nozzle on the other end. the water faucet is turned on, what is the pressure inside the hose
An unknown material has a normal melting/freezing point of -26.3 ° C, and the liquid phase has a specific heat capacity of 160 J/(kg · C °). What is the latent heat of fusion of the unknown material
An object 6.0mm high is placed 18cm from a convex mirror of radius of curvature 18cm. Determine the image distance using the mirror equation
A bus is traveling up a hill at a speed of 34m/s. The hill is 23 degrees relative to horizontal and the coefficient of static friction between the bus's tires and the road is 0.6. What is the car's minimum breaking distance?
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