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A skydiver is falling downward through the air. He weighs 241.5 pounds. There is an upward force of air friction opposing his fall.
a. What is the mass of the skydiver?
b. If he is accelerating downward at 10.0 ft/s/s, what is the resultant downward force acting on him?
c. What is the upward force of air friction?
A 131kg astronaut (including space suit) acquires a speed of 2.32m/s by pushing off with her legs from an 1760kg space capsule. What is the change in speed of the space capsule
Find the total number of lines in a 2.90 wide diffraction grating whose third-order spectrum has the 640 hydrogen- spectral line at an angular position of 39.0.
Assuming that air resistance exerts a 95 N force on the person during the fall, identify the person's velocity just before hitting the net.
A box is lifted with a pry bar , by slipping the bar under the box and lifting up on the bar. what is the size of the force required to lift the box
A slide projector needs to create a 97 cm high image of a 2.0 cm tall slide, How far should you place the lens from the slide
A certain satellite travels in an approximately circular orbit of radius 9.1 × 106 m with a period of 8 h 39 min. Calculate the mass of its planet from this information.
A 240g block on a 60cm-long string swings in a circle on a horizontal, frictionless table at 70rpm.
A car takes 11 s to go from v = 0 to v = 75 m/s at approximately constant acceleration. If you wish to find the distance travelled using equation d = 1/2 at2, what value should you use for a.
Iced tea is made by adding ice to 2.4 kg of hot tea, initially at 70?C. How many kg of ice, initially at 0?C, are required to bring the mixture to 10?C? (Lf = 3.33×105 J/kg, cw = 4,186 J/kg•? C)
A photon has momentum of magnitude 8.15×10?28kg?m/s. What is the wavelength of this photon
7.22 x1013 electrons flow through a transistor in 3.55 ms. What is the current (in mA) through the transistor
For a damped oscillator with a mass of 240 g, a spring constant 59 N/m and a damping coefficient of 75.00 g/s, what is the ratio of the amplitude of the damped oscillations to the initial amplitude at the end of 12 cycles.
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