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a spring of stiffiness k supports a box of mass M in which is placed a blokk of mass m. find the force of reaction between the blook and the box
Red light of wavelength 633nm from a helium-neon laser passes through a slit 0.370mm wide. What is the width of the central bright fringe
When jumping, a flea reaches a takeoff speed of 1.0m/s over a distance of 0.48mm. how high would he go
You clamp a straight ramp of length 51 cm making an angle of 18.0° with the horizontal table top, What time elapses from when the car leaves the ramp until it reaches the floor
While running a marathon, a long-distance runner uses a stopwatch to time herself over a distance of 100. How long will it take her to run a mile at this speed
The rear end of an air conditioner dumps 1.2 * 10^7 J/hr of waste heat into the air outside a building. A fan assists in the removal of this heat. With what temperature does the air emerge
BIO Electric Potential across a Cell Membrane In a typical living cell, What is the magnitude and direction of the electric field within the cell membrane
A car moves with a constant acceleration of 2.1 m/s2. At a time of 1 s, it is 170 m beyond a mile marker, Find the car's position after the mile marker at time 5 s
A particle with a charge of ? 3.00?C is placed at the point P described in part A. What is the direction of the force exerted by the particle
Two 2.0-cm-diameter insulating spheres have a 6.00cm space between them. find the electric field strength at the midpoint between the two spheres
Zinc has a density of 7.14 g/cm3, and the mass of a zinc atom is 1.09 10-25 kg. What is the distance between the centers of adjacent atoms
Two 2.7cm -diameter disks face each other, 2.7mm apart. They are charged to ±14nC. What is the electric field strength between the disks
Two 10-cm-diameter charged rings face each other, 21.0cm apart. Both rings are charged to + 50.0nC. What is the electric field strength at the midpoint between the two rings
Your plane reaches its takeoff runway and then holds for 5.0 min because of air-traffic congestion. What is its takeoff speed
A line of charge starts at x = +x0 and extends to positive infinity. The linear charge density is ? = ?0x0/x, Determine the electric field at the origin
A tennis ball on Mars, where the acceleration due to gravity is 0.379 of a g and air resistance is negligible, How fast was it moving just after being hit
A gnat takes off from one end of a pencil and flies around erratically for 26.6 seconds before landing on the other end of the same pencil. find the gnat\'s average speed
A ball is dropped from a high building. Using the approximate value of g = 10 m/s2, find the change in velocity between the fourth and fifth second of its flight
A cylindrical region of space of radius R contains a uniform magnetic field B with direction into the page. Find the magnitude and direction of the induced electric field at r = 5.00 cm if the magnet
Two point charges are located on the y-axis as follows: one charge q1 = -1.85nC located at y=-0.585m , and a second charge q2 = 3.10nC at the origin (y=0). what is the direction of the total force
A plane accelerates from rest at a constant rate of 5.00m/s2 along a runway that is 1800m long. What is the time tTO needed to take off
Ilya and Anya each can run at a speed of 8.40mph and walk at a speed of 3.00mph. Find Anya's average speed. How long does it take Ilya to cover the distance
A charge of q = +7.22 ?C is located in an electric field. The x and y components of the electric field at this point are Ex = 6.48E+3 N/C, What is the magnitude of the force on the charge
A positive point charge q is fixed in position at the center of a square. A second point charge is fixed to corner B, C, or D. At which corner is the second charge located
During launches, rockets often discard unneeded parts. A certain rocket starts from rest on the launch pad, What total distance did the canister travel between its release and its crash onto the launc