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An 92 kg parachutist descends through a vertical height of 420m with constant speed. Find the increase in entropy produced by the parachutist, assuming the air temperature is 21 degrees C
Consider a meter stick with 4 masses hanging on it. The first mass is 100 grams and is at 10 cm. The second is 50 grams at 60 cm. The third is also 100 grams, but is at 60 cm. Where is the fourth m
A 3.45 V battery is connected in series with a resistor and an inductor. The series circuit has a time constant of 556 μs, and the maximum current is 269 mA. What is the value of the inductance?
The acceleration of gravity is 9.8 m/s2 . Find the coefficient of static friction between crate and floor.
The total energy stored in two capacitors is 0.0115 J. A) What is the unknown capacitance , C? B) what is the total charge on the two capacitors?
If a liquid only half as dense as mercury were used in a barometer, how high would its level be on a day of normal atmospheric pressure (when the mercury barometer reads 76 cm)?
A 165-lb person consumes a small order of french fries (250.0 Cal) and wishes to "work off" the energy by climbing a 10.0m stairway. How many vertical climbs are needed to use all the energy?
A solid sphere is thrown on a horizontal plane in such a way that initially it slips without rolling in a direction parallel to the plane with a velocity v0=34 m/s. If the coefficient of kinetic fr
When the convex mirror is replaced with a plane mirror, the image moves 5.5 cm farther away from the mirror. Find the focal length of the convex mirror.
The image of this second object has the same height as the other image. How far in front of the mirror is the second object located?
Determine the magnitude and direction of the acceleration of the -1.2 micro coulomb charge when it is allowed to move if the other two charges remain fixed.
A toy car moves at a velocity of 65.0 m/s on a compass heading of 115 degrees. What are the components, magnitude, and direction of the car?
Bats are capable of navigating using the earth's field-a plus for an animal that may fly great distances from its roost at night. what is the proper orientation of the coil?
Find the minimum diameter of an l = 15.2 m long brass wire that will stretch no more than 8.94 mm when a mass of 301 kg is hung on the lower end. (Hint: The Young's modulus of brass is 91.0 GPa.)
A projectile is fired at such an angle from the horizontal that the vertical component of its velocity is 49.00 m/s. The horizontal component of its velocity is 61 m/s. A) How long does the projecti
The radius of curvature of a convex mirror is 1.60 x 102 cm. An object that is 14.0 cm high is placed 40.0 cm in front of this mirror. Determine (a) the location and (b) the height of the image.
A convex mirror in a department store produces an upright image 0.65 times the size of a person who is standing 250 cm from the mirror. What is the focal length of the mirror?
The electric potential in a certain region of space is given by V = -7.5x2 + 3x, where V is in volts and x is in meters. In this region the equipotential surfaces are
Water flows at 0.56 m/s through a pipe 18 cm in diameter when the pressure is 360,000 Pa. Determine the water velocity & the pressure in the pipe be if it shrinks down to 6 cm in diameter. You
What is the magnitude of the acceleration of one of the liners toward the other due to their mutual gravitational attraction? Treat the ships as particles.
What is the angular frequency of electrical oscillations in an L-C circuit?
An archer shoots an arrow horizontally at a target 17 m away. The arrow is aimed directly at the center of the target, but it hits 56 cm lower. What was the initial speed of the arrow?
A hot wheels track has a spring loaded launcher. A 100g car is pushed into the launcher, which compresses the spring by 2cm. what are the energy conversions from beginning to the end of the track.
A ball is thrown at 45 degrees with an initial velocity of 96.6 km/hr from a car traveling at 73 km/hr. What is the ball's initial velocity with relative to the earth?
Following the procedure in the video, create three traces of the pendulum motion of the cup. Compare the three traces for amplitude, wavelength, and frequency.