What do we mean by the spin of a subatomic particle?
A) It is one of the basic properties of any particle and is a measure of the particle's angular momentum.
B) It describes how fast the particle is rotating on its axis at a given time; if more torque is applied, the particle spins faster.
C) It is a measure of the particle's electrical charge.
D) The spin of a particle describes how the story of the particle is portrayed to journalists.
A) It is one of the basic properties of any particle and is a measure of the particle's angular momentum.
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The heater element of a particular 120-V toaster is a 8.9-m length of nichrome wire, whose diameter is 0.86 mm. The resistivity of nichrome at the operating temperature of the toaster is 1.3 × 10-6 ? ? m
If the toaster is operated at a voltage of 120 V, how much power does it draw? A) 720 W B) 700 W C) 750 W D) 770 W E) 800 W
An object will float in a fluid if the average density of the object is greater than the density of the fluid
Indicate whether the statement is true or false
The deviation of a lens from its ideal behavior is referred to as
A) spherical aberration. B) chromatic aberration. C) an aberration. D) achromatic aberration. E) None of the other choices is correct.
A photon is emitted from a hydrogen atom that undergoes a transition from n = 3 to n = 2 . Calculate the energy and wavelength of the photon. (The ionization energy of hydrogen is 13.6 eV, and h = 6.63 × 10^-34 J×s, c = 3.00 × 10^8 m/s, 1 eV = 1.60 × 10^-19 J, and 1 nm = 10-9 m)
a. 2.21 eV, 563 nm c. 2.58 × 10^–19 J, 658 nm b. 1.89 eV, 460 nm d. 3.02 × 10^–19 J, 658 nm