What is the kinetic energy of an electron that passes undeviated through perpendicular electric and magnetic fields if E = 4.0 kV/m and B = 8.0 mT?
a. 0.65 eV
b. 0.71 eV
c. 0.84 eV
d. 0.54 eV
e. 1.4 eV
b
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Iron does not release energy when it is fused.
Answer the following statement true (T) or false (F)
Spheres of Charge: A nonconducting sphere of mass 18.5 kg and diameter 25.0 cm has 8.10 × 1015 electrons removed from it. The points of removal are spread uniformly throughout the volume of this sphere. A tiny neutral plastic ball of mass 0.120 g is placed just outside the surface of the large sphere and is then released. How many electrons must be removed from the plastic ball so that its initial acceleration just after being released will be 1525 m/s2? You can neglect gravity. (e = 1.6 × 10-19 C, k = 1/4??0 = 8.99 × 109 N ? m2/C2)
Fill in the blank(s) with the appropriate word(s).
When a car goes around a curve of smaller and smaller radius, the centripetal force on it decreases
Indicate whether the statement is true or false
If a nucleus has a volume of
what is its mass number?
A. 1 B. 25 C. 100 D. 138 E. 174