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The extra-solar planet 55 Cancri e has recently been in the news due to temperature variations in the planet's atmosphere. How were these changes detected? What do they indicate may be happening on 55 Cancri e?
A 65.0 kg person throws a0.045 kg snowball forward with aground speed of 30.0 m/s. What are the velocities of the two people after the snowballis exchanged
a. What star has the coolest surface temperature b. Which star has the hottest surface temperature c. What is the approximate range of radii of stars in the main sequence compared to the size of the sun
ConsideragainFig.1.12.Nowletthe14-kgweighthangfromthemid- dle of the lower arm (20 cm from the fulcrum). Calculate the biceps force and the reaction force at the joint
A tennis ball connected to a string is spun around in a vertical, circular path at a uniform speed, What is the magnitude of the tension in the string when the ball is at the bottom of the circle
A 1.5-kg mass attached to spring with a force constant of 20.N/m oscillates on a horizontal, frictionless track. At t=0, the mass is released from rest at x=10.0 cm (That is, the spring is stretched by 10.00cm)
A boeing 747 "jumbo jet" has a length of 59.7m the runway on which the plane lands intersects another runway. the width of the intersection is 25.0m. the plane decelerates through the intersection at a rate of 5.7 meter per second square and clears i..
Two particles having charges of 0.580 nC and 14.5 nC are separated by a distance of 2 meter. Find where would the net electric field be zero if one of the charges were negative
A certain lightbulb has a tungsten filament with a resistance of 19.1 ? when at 20.0°C and 139 ? when hot, Find the temperature of the hot filament
A very large truck sits on a frozen lake. Assume there is no friction between the tires and the ice. A fly suddenly smashes against the front window. What will happen to the truck?
The record for the highest speed achieved in a laboratory for a uniformly rotating object was 2.01e3m/s for a 0.15m long carbon rod
A 0.250 kg mass is moving on the end of a spring (k =3.50 N/m) and is damped by a force: Fx = -bvx. If the constant b = 0.860 kg/s, what is the frequency of the oscillation
Negative charge -Q is distributed uniformly around a quarter-circle of radius a that lies in the first quadrant with the center of curvature at the origin. find the x components and y components of the net electric field at the origin for Q=20uc a..
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