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A jogger runs in a straight line with an average velocity of 5.1m/s for 2.1 min, and then with an average velocity of 4.9 m/s for 2.6 min. What is her total displacement in units of m. And what is her average velocity during this time in units of m/s.
A 15 kg box is pulled horizontally by a 20 N force on a frictionless surface. What is the change in kinetic energy of the box
The brakes of a truck cause it to slow down by applying a retarding force of 4060 N to the truck over a distance of 1150 m
an astronaut is rotated in a horizontal centrifuge at a radius of 5.0 m.a what is the astronauts speed if the
A current of 10.0 mA is maintained in a single circular loop with a circumferenceof 1.20 m. A magnetic field of 0.880 T is directed parallel to the plane of the loop. What is the magnitude of the torque exerted by the magnetic field on the loop?
Your friend needs advice on her newest "acoustic sculpture." She attaches one end of a steel wire, of diameter 3.98 mm and density 7860 kg/m3, to a wall. What weight (in newtons) should she hang from the wire if the temperature is 17.5°C
what would the g-force, kinetic energy and overall force a human head would absorb if they were broadside t-boned by an 80,000 pound tanker that was moving 45 miles per hour and that head absorbing party
A recent theory suggests that time may be quantized, and that the quantum, or elementary amount, of time is given by the equation t= h/(mpc^2), where h is blank constant, mp is the portion mass and c is the speed of light. comfirm that this equati..
Suppose you are riding a stationary exercise bicycle, and the electronic meter indicates that the wheel is rotating at 9.1 rad/s, For how many minutes have you been riding your bike
Assuming that the atom was initially at rest, determine the recoil speed of the hydrogen atom when this photon is emitted
A man's leg can be thought of as a shaft of bone 1.2m long. If the strain is 1.3x 10^-4 when the leg supports his weight, by how much is his leg shortened
Light traveling in air enters a material at an angle of 25 degrees with respect to the normal. The refracted beam in the material makes an angle of 18 degrees with respect to the normal. Calculate the index of refraction of the material.
A right triangle has sides of 30, 40 and 50 cm. A charge of -10 x 10-6 C is placed at the right angle; a charge of + 10 x 10-6C at the smaller acute angle and a charge of + 5.0x10-6 C at the larger acute angle
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