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A projectile of mass 0.831 kg is shot straight up with an initial speed of 28.9 m/s. If the projectile rises to a maximum height of only 7.27 m, determine the magnitude of the average force due to air resistance.
A boy of mass 60.8 kg is rescued from a hotel fire by leaping into a firefighters' net. The window from which he leapt was 9.5 m above the net. What is the average force on the net due to the boy during the interval
the amount of charge that passes through the filament of a certain lightbulb in 2.00 s is 1.67c.a find the current in
Carry out the following arithmetic operations: (a) sum of the measured values 756, 37.2, 0.83 and 2.5. The answer must be in significant digits. Since 2.5 and 0.83 have two significant digits, shouldn't the answer be 800 instead of 797.
A person with mass mp = 70 kg stands on a spinning platform disk with a radius of R = 2.13 m and mass md = 187 kg. What is the final angular velocity of the disk
A transformer has 30 turns of wire in its primary and 76 turns in its secondary. What is the output potential difference
A cyclotron operates with a given magnetic field and at agiven frequency. If R denotes the radius of the final orbit, the final particle energy is proportional to 1/R. A cyclotron operates with a given magnetic field and at agiven frequency. If R ..
Three unknown resistors are in a bin; let's call them red, green, and blue. When a Physicist connects the three resistors in series to a 30 volt source she measures 1A of current. what is the charging time constant
Illustrates the physics principles in this problem. An astronaut in his space suit and with a propulsion unit (empty of its gas propellant) strapped to hisback has a mass of 147 kg. During a space-walk, the unit, which hasbeen filled with propella..
An electron is accelerated by a constant electric field of magnitude 325 N/C. (a) Find the acceleration of the electron. m/s2 (b) Use the equations of motion with constant acceleration to find the electron's speed after 9.00 10-9 s, assuming it st..
you are driving with a friend who is sitting to the right of you in the passenger seat. You would like to get closer to your friend and decide to use physics to achieve your romantic goal by making a quick turn.
An object is 20 cm to the left of a lens of focal length 10 cm. What is the distance between the original object and the final image
A flywheel in a motor is spinning at 580 {rm rpm} when a power failure suddenly occurs. The flywheel has mass 40 {rm kg} and diameter 75 {rm cm}.
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