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A meterstick is supported by a knife-edge at the 50-cm mark. Doug hangs masses of 0.40 and 0.60 kg from the 5-cm and 70-cm marks, respectively. Where should Doug hang a third mass of 0.20 kg to keep the stick balanced?
When forced by F1 = Fo sin , determine the equations for the amplitudes and plot them against w/w11.
An 80 kg spacewalking astronaut pushes off a 640 kg satellite, exerting the 100N force for the 0.50 s it takes him to straighten his arms.
For this aircraft, each wing has an area of 24 m2. When the plane is traveling at normal speed, the speed of the wind belowthe wing is taken as 200 m/s and the speed of the wind above is approximately 251 m/s due to the design of the wing.
A 0.025 kg golf ball moving at 21.0 m/s crashes throughout the window of a house in 2.0 10-4 s. After the crash, ball continues in the same direction with a speed of 10 m/s. assuming the force exerted on the ball by the window was constant, what w..
A rectangular loop of 250 turns is 20.8 cm wide and 16.5 cm high. What is the current in this loop if the maximum torque in a field of 0.410 T is 23.1 N·m
A dish antenna with a diameter of 22.8 m receives (at normal incidence) a radio signal from a distant source, find the intensity of the radiation received by the antenna
A car travels 20km at an average speed of 80km/hr and then stops for 15 mins to get fuel. It then continues on the same direction for another 20 km at an average speed of 40km/hr. What is the average acceleration of the 40km trip.
A certain dog whistle operates at 21.6 hz while another brand X operates at an unknown frequency. estimate the operating frequency of brand X
A 6.5- kg block oscillates with an amplitude of 0.100 m on a light spring of constant k = 16.0 N/m. What is the maximum value of the block's velocity
A leopard seal jumps onto an uphill ice flow at 7 m/s. The ice is flat but sloped at 30o to the horizontal. Find how long is it before the seal slides back into the water
A battery with an emf of 12.6 V and internal resistance of0.83Ω is connected across a load resistor R. If the current inthe circuit is 0.85 A, what is the value of R? What power is dissipated in the internal resistance of the battery?
While waiting for your plane to take off, you suspend your keys from a thread and set the resulting pendulum oscillating. It completes precisely 88 cycles in 1 minute. You repeat the experiment as the plane accelerates down the runway, and now find t..
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