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The pulmonary artery, which connects the heart to the lungs, has an inner radius of 2.2 mm and is 8.6 cm long. If the pressure drop between the heart and lungs is 400 Pa, what is the average speed of blood in the pulmonary artery?
A quasar 10 billion light years from Earth appears the same brightness as a star 5.9*10^4 light years away. How does the power ouput of the quasar compare with that of the star
A transistor radio operates by means of a 12 V battery that supplies it with 56 mA current. what is the cost per kWh to operate the radio in this manner
An object starts from rest at t= 2 s at an initial position of x = 7.2 m and moves with constant acceleration. What is the magnitude of the acceleration of the object
The amount of charge that passes through the filament of a certain lightbulb in 2.00 s is 1.67C. find the current in the lightbulb
Two blocks, masses m1 and m2 are connected by an ideal string passing over an ideal pulley. Find the acceleration of each block
A solenoid (coil) has a radius of 7.2 cm, a length of 31.5 cm, and has 380 turns of wire. A current of 350 mA runs through the coil. Calculate the field strength inside the coil
A spherical weather balloon is filled with hydrogen until its radius is3.00m. Its total mass including the instruments it carries is10.0kg. Find the buoyant force acting on the balloon
The inductance of a solenoid with 450 turns and a length of 53 cm is 5.5 mH. What is the cross-sectional area of the solenoid
A soccer player kicks a ball that is on the ground down the field. The balls initial velocity is 10 m/s, 30 degrees above the horizontal. How long does is take for the ball to land down the field
A circular wire loop of radius 13cm carries a current of 3.66 A. It is placed so that the normal to its plane makes an angle of 34.8° with the uniform magnetic field of magnitude 9.70 T.
The Beretta Model 92S (the standard-issue U.S. army pistol) has a barrel 127 long. The bullets leave this barrel with a muzzle velocity of 334 .What is the acceleration of the bullet while it is in the barrel, assuming it to be constant?
The angular position of a point on the rim of a rotating wheel is given by ? = 7.68t - 5.13t2 + 1.73t3, where ? is in radians and t is in seconds. find the angular velocities at the end of this time interval
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