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A doubly charged helium atom whose mass is 6.6 ×10?27kg is accelerated by a voltage of 2700V .
A) What will be its radius of curvature if it moves in a plane perpendicular to a uniform 0.370 ?T field?
B) What is its period of revolution?
Two charged spheres are 15 cm apart. They are moved, and the force on each of them is found to have been quadrupled. How far apart are they now.
A 25 kg trunk strikes the ground with a speed of 12.5m/s. if no energy is lost from air resistance, what is the height from which trunk fell.
A moving particle encounters an external electric field that decreases its kinetic energy from 9910 eV to 6840 eV as the particle moves from position A to position B.
Julie throws a ball to her friend Sarah. The ball leaves Julie's hand a distance 1.5 meters above the ground with an initial speed of 22 m/s at an angle 63 degrees, What is the distance between the two girls
What least heat is needed to bring 80 of water at 20 to the boiling point and completely boil it away? (answere in Joules).
A particle's trajectory is described by x=(12t3?2t2)m and y =(12t2?2t)m, What is the particle's direction of motion, measured as an angle from the x-axis, at t=5.0s
An automobile travels on a straight road for 40.0 km [E] at 30.0 (km/h). It then continues in the same direction for another 40.0 km [E] at 60 (km/h). Estimate the average speed, distance, displacement, & average velocity for the trip.
Two parallel plates, each of area 8.17 cm2, are separated by 6.20 mm, Calculate the amount of the electric charge stored on each plate
A lens has diameter of 30 mm, What is the lens' theoretical resolution limit (in nm) when it is used in air with light of 550-nm wavelength
Cells maintain a high concentration of macromolecules inside them. How do you expect this to affect the osmotic pressure inside the cell? What mechanisms does the cell use to counterbalance osmotic pressure? What are "depletion forces" and why are..
The gravitational force between two masses M and m separated by a distance r is 40 N. What is the new force when this distance is halved?
A vessel whose walls are thermally insulated contains 2.10 of water and 0.450 of ice, all at the temperature of 0 . The outlet of a tube leading from a boiler in which water is boiling at atmospheric pressure is inserted into the water.
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