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The average density of the solar wind at 1 AU is 7protons/cm3 and has an average radial speed of 400 km/s.Assuming that the mass of the solar wind was conserved as it movedaway from the sun and the speed remained constant, estimate themass/second of solar wind striking the surface of venus.
A 1.8-kg block slides down a fixed, rough curved track. What is the change in mechanical energy of the block coused by the force of friction during this descent
q1. a diffraction grating with exactly 1000 lines per centimeter is illuminated by a he-ne laser of wavelength 683
A 3.80 m-long, 430 kg steel beam extends horizontally from the point where it has been bolted to the framework of a new building under construction. A 66.0 kg construction worker stands at the far end of the beam. What is the magnitude of torque abou..
A chemistry student with a mass of 75 kg is riding a steadily moving Ferris wheel. What is the magnitude of the normal force on her body
Does current through a power supply increase when parallel bulbs are added? what is the current through the power source
A 61.0 skier is moving at 6.15 on a frictionless, horizontal snow-covered plateau when she encounters a rough patch 3.55 long. How fast is the skier moving when she gets to the bottom of the hill
What is the total charge of the uranium nucleus? (The neutral uranium atom has 92 electrons.), What is the magnitude of its electric field at a distance of 1.48×10-10 m from the nucleus
a 500 g ball swings in a vertical circle at the end of a 1.5-m-long string. When the ball is at the bottom of the circle the tension in the string is 15 N. What is the speed of the ball at that point?
A banked circular highway curve is designed for traffic moving at 85 km/h. The radius of the curve is 158 m. Traffic is moving along highway at 48 km/h on the rainy day. What is the minimum coefficient of friction between tires and road that would al..
An automobile suspension involves both leaf springs with stiffness k and shock absorbers resist motion with a force -uv. The system is critically damped. If a car has mass 2000 kg and has shock absorbers with u = 2.5 x10^4 kg/s, how much should the c..
An 900 kg purple pickup truck tows a small 200 kg trailer using a relatively lightweight tow rope as shown in the animation. What is magnitude of the net force on the trailer
A diffraction grating is 25.0 mm wide and has 8,000 rulings (lines). Light of wavelength 656 nm is incident on the grating, and a diffraction pattern is seen on a screen a short distance away. a) What is the distance between adjacent rulings of the g..
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