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A string 2.0 m long is held fixed at both ends. IF a sharp blow is applied to the string at its center, it takes 0.050 s for the pulse to travel to the ends of the string and return to the middle. What are the lowest three standing wave frequencies for this string?
One end of a 33cm long aluminum rod with a diameter of 2.8 is kept at 420C and the other is immersed in the water at 24C
A cat walks along a plank (length = 4.00 m and mass = 7.00 kg). What is the mass of the cat
The U.S. Army's parachuting team, the Golden Knights, are on a routine jumping mission over a deserted beach. With what average force did the parachuter hit sand
determine average net force exerted in the barrel of cannon.
A blue puck with a mass of 3.60×10?2kg , sliding with a speed of 0.180m/s on a frictionless, horizontal air table, makes a perfectly elastic, head-on collision with a red puck with mass m, Find the mass m of the red puck
A gun is fired vertically into a m = 1.44 kg block of wood at rest on a thin horizontal sheet directly above it. How high from the sheet will the block rise into the air
Estimate the gravitational force between the Sun and Venus. The mass of the Sun is 1.99×10^30 kg. The mass of Venus is 48.7×10^23 kg. The distance between them is 10.8×10^10 m.
A red laser pointer with a wavelength of 635 nm is shined on a double slit producing a diffraction pattern on a screen that is 1.75 m behind the double slit. The central maximum of the diffraction pattern has a width of 4.30 cm, and the fourth bright..
A car travels a straight road at 130 km/h for 30min then at 50 km/h for 10min . It then reverses and goes at 80 km/h for 20min . What is the average velocity for the entire trip? What is the average speed for the entire trip?
What is the difference in blood pressure ({rm mm-Hg}) between the top of the head and bottom of the feet of a 1.80-{rm m}-tall person standing vertically.
A cart of mass M = 1.2 kg can roll without friction on a level track. A light string draped over a light, frictionless pulley connects the cart to a hanger with mass m = 0.5 kg. The cart is released from rest, allowing it to roll, pulled by falling h..
Three forces act on a body which moves with constant velocity. One force is 9 N acting at an angle of 70°, What is the angle of the third force
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