Circular Motion of Charges: A proton is accelerated from rest through 0.50 kV. It then enters a uniform magnetic field of 0.30 T that is oriented perpendicular to its direction of motion.(a) What is the radius of the path the proton follows in the magnetic field?(b) How long does it take the proton to make one complete circle in the magnetic field?.
What will be an ideal response?
(a) 11 mm (b) 0.22 µs
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One mole of the carbon-12 isotope contains 6.022 × 10^23 atoms. What volume in m3 would be needed to store one mole of cube-shaped children's blocks 2.00 cm long on each side?
a. 4.8 × 10^18 b. 1.2 × 10^22 c. 6.0 × 10^23 d. 1.2 × 10^24 e. 4.8 × 10^24
Nuclear Binding Energy: The stability of 
Cl with respect to alpha, beta-plus and beta-minus decay is to be determined. The following atomic masses are known:
A. not subject to alpha, beta-plus or beta-minus decay. B. subject to alpha decay only. C. subject to beta-plus decay only. D. subject to beta-minus decay only. E. subject to beta-plus or beta-minus decay, but not to alpha decay.
The half-life of a muon is 2.2 ?s. How fast is it moving relative to an observer who says its half-life is 4.4 ?s?
a. 0.87c b. 0.75c c. 0.97c d. 0.72c e. 0.50c
A solid sphere of mass 2.5 kg and radius 0.12 m starts from rest at the top of a ramp inclined 15° and rolls to the bottom. The upper end of the ramp is 1.2 m higher than the lower end. What is the linear speed of the sphere when it reaches the bottom of the ramp? (Note: I = 0.4MR2 for a solid sphere, and g = 9.8 m/s2.)
a. 4.1 m/s c. 3.4 m/s b. 4.7 m/s d. 2.4 m/s