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A helium ion (Q = +2e) whose mass is 6.6×10?27kg is accelerated by a voltage of 3700V .
A) What is its speed? Express your answer to two significant figures and include the appropriate units.
B) What will be its radius of curvature if it moves in a plane perpendicular to a uniform 0.380T field? Express your answer to two significant figures and include the appropriate units.
C) What is its period of revolution? Express your answer to two significant figures and include the appropriate units
What is wave number
A spherical cavity is excised from the inside of the sphere. The cavity has radius a4and is centered at position h, Find the electric field inside the cavity
Styrofoam has a density of 300 kg/m^3 . What is the maximum mass that can hang without sinking from a 20.0cm -diameter Styrofoam sphere in water? Assume the volume of the mass is negligible compared to that of the sphere.
Calculate the force of gravity on the same 1-kg mass if it were is 6.4 x106 m above the earth’s surface (that is, if it were 2 Earth radii from the Earth’s center)
A flight attendant pulls her 71 N flight bag a distance of 322 m along a level airport floor at a constant velocity. The force she exerts is 36 N at an angle of 53° above the horizontal.
A proton is at the origin and an electon is at the point x = 0.41 nm, y = 0.36 nm. Find the electric FIELD at the proton,
Lunar astronauts placed a reflector on the moon's surface, off which a laser beam is periodically reflected, What percent accuracy is this, given the average distance to the moon is 3.84
A flight attendant pulls her 63N flight bag a distance of 312m along a level airport floor at a constant velocity. The force she exerts is 39N at the angle of 59° above the horizontal.
When she tightens the string slightly, she hears 6 beats/s. What is the frequency of string now.
What's the quickest way to approach this problem? A car is traveling at 80 km/h along the highway. A second car is located 1 km behind, but traveling at 100 km/h. How long does it take for the second car to pass the first?
A heat engine operates in a Carnot cycle between 82.0°C and 345°C. It absorbs 20,000 J of energy per cycle from the hot reservoir, What is the mechanical power output of this engine
In a ballistics test, a 25.00 g bullet travelling horizontally at 1300m/s goes through a 20.00 cm thick 450 kg stationary target and emerges with a speed of 800m/s. The target is free to slide on a smooth horizontal surface. How long is the bullet..
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