Q:1-Suppose that a huge tank 50m high and filled with water is open to the atmosphere and is hit with a bullet that pierces one side of the tank, allowing water to flow out. The hole is 2m above the ground. If the hole is very small in comparison with the size of the tank, how quickly will the water flow out of the tank?
Mark one answer:
30.67m/s
21.69m/s
112.8m/s
940.8m/s
There is not enough information

Q:6-The speed of light in a vacuum, c, is calculated to be 2.99 ‧ 108m/s. The speed of light in a diamond is calculated to be 1.25 ‧ 108m/s. What is the refractive index of diamond?
Mark one answer:
4.500
2.392
0.418
2.000
1.578

Q:7-Compound X is found to radioactively decay with a rate constant equal to 3.7 ‧ 10^-4s^-1. If a time of 20min passes by, what percentage of Compound X has decayed within this period?
Mark one answer:
75%
25%
64%
36%
50%

Q:8-_____ is the process of combining two or more atoms into a single, larger atom. _____ is the process of splitting a single atom into two or more smaller atoms. _____ can occur in nature—in a star, for example. _____ doesn't normally occur in nature.
Mark one answer:
Fusion ..... Fission ..... Fission ..... Fusion
Fission ..... Fusion ..... Fusion ..... Fission
Fission ..... Fusion ..... Fission ..... Fusion
Fusion ..... Fission ..... Fusion ..... Fission
None of the other answers is correct

Q:9-Which of the following types of decay particles is known as a positron?
Mark one answer:
β⁺ particle
α particle
β^- particle
γ ray
None of these particles are known as positrons

Q:10-A physicist is trying to determine the identity of a metal by experimentally finding its work function and then comparing the experimental value to a list of known values. If the physicist shines light with a frequency of 3.76 ‧ 10¹⁴Hz on the metal and records an electron speed of 8.6 ‧ 10⁵m/s, what is the work function of the metal?
m_electron = 9.1 ‧ 10^-31kg
h = 6.63 ‧ 10^-34J ‧ s
1eV = 1.6 ‧ 10^-19J
Mark one answer:
5.93eV
2.36eV
3.66eV
4.98eV
2.87eV