A proton is accelerated from rest through a potential difference of 2.5 kV and then moves perpendicularly through a uniform 0.60-T magnetic field. What is the radius of the resulting path?
A. 15 mm
B. 12 mm
C. 18 mm
D. 24 mm
E. 8.5 mm
Answer: B
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A solid sphere and a solid cylinder of the same mass and radius roll without slipping at the same speed. It is correct to say that the total kinetic energy of the solid sphere is
A) more than the total kinetic energy of the cylinder. B) less than the total kinetic energy of the cylinder. C) equal to the total kinetic energy of the cylinder. D) impossible to compare to the total kinetic energy of the cylinder.
Earth's core is slightly hotter than the surface of the Sun.
Answer the following statement true (T) or false (F)
In a completely inelastic collision between two objects where the mass of one is double that of the other, which of the following statements is always true?
a. The larger mass will always lose kinetic energy. b. The smaller mass will always gain kinetic energy. c. The momentum of the smaller mass will have a larger magnitude change than that of the larger mass. d. Not even one of the above statements is true.
Jupiter and Saturn emit ____ heat than absorbed from the Sun due to _____ is the result of____
a. excess; nuclear reactions in their liquid metallic hydrogen cores. b. less; nuclear fusion of hydrogen to helium in their liquid metallic hydrogen cores. c. excess; heat left over from their formation d. less; heat left over from their formation