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A scholar driving home for the holidays starts at 8:00 am to make the 675 kilometer trip, practically all of which is on nonurban interstate highway. If she wants to arrive home no later than 3:00 pm, determine what must be her minimum average speed? Find will she have to exceed the 65-mi/h speed limit?
a 56kg student runs at 5.0 m/s, grabs a hanging rope, and swings out over a lake (as shown). He releases the rope when his velocity is zero, draw the FBD of the student on the rope
A proton has a velocity of 9.0 101 m/s + 1.9 102 m/s and is located in the z = 0 plane at x = 3.1 m, y = 3.6 m at some time t = T. Find the magnetic field in the z = 0 plane at the following.
The primary coil of a transformer hasN1=360turns, and the secondary coil hasN2=1 890turns. what rms voltage is developed across the secondary coil
A grade school student plans to build a 34-power telescope as a science fair project. What focal length is needed for her objective lens
Mattwe pulls his little sister sarah in a sled on an icy surface, with a force of 60 N at an angle of 37 ° upward from the horizontal. If he pulls her a distance of 12m, then determine the work done by matthew?
Perpetual motion machines have fascinated people especially inventors for hundreds of years before the laws of thermodynamics became known. Ideally, once energy is added to start a perpetual motion in machine, the machine would continue to operate..
Two coplanar and concentric circular loops of wire carry currents of I1 = 6.20 A and I2 = 2.50 A in opposite directions as in the figure below. (a) If r1 = 12.0 cm and r2 = 8.60 cm, what is the magnitude of the net magnetic field at the center of ..
A driver releases an air bubble of volume 2.0 cm3 from adepth of 15 m below the surface of a lake, where the temperature is7.0oC. What is the volume of the bubble when it reachesjust below the surface of the lake, where the temperature is20oC?
A uniform solid disk of radius 1.60 m and mass 2.30 kg rolls without slipping to the bottom of an inclined plane. what is the height of the inclined plane
A person who weighs 605 N is riding a 98-N mountain bike. Suppose the entire weight of the rider and bike is supported equally by the two tires. If the gauge pressure in each tire is 890000 Pa, what is the area of contact between each tire and the gr..
A heat engine that is 58.6% efficient does 235.4 kJ of work. How much thermal energy input was required to perform this work
a 327 kg satellite is in circular orbit around the earth and moving at a speed of 2.61 kms. how much work must be done
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