Problem 48
Find the length of magnesium metal ribbon that remains after two \(25.0-\mathrm{cm}\) strips are cut from \(255 \mathrm{~cm}\) of the ribbon.
Problem 49
Convert the following exponential numbers to scientific notation. (a) \(352 \times 10^{4}\) (b) \(0.191 \times 10^{-5}\)
Problem 50
Convert the following exponential numbers to scientific notation. (a) \(0.170 \times 10^{2}\) (b) \(0.00350 \times 10^{-1}\)
Problem 51
The mass of a neutron is \(1.6749 \times 10^{-24} \mathrm{~g}\), and the mass of a proton is \(1.6726 \times 10^{-24} \mathrm{~g} .\) What is the total mass of a neutron and a proton?
Problem 53
A metric ton is defined as \(1000 \mathrm{~kg},\) or \(2.200 \times 10^{3} \mathrm{lb}\). An English ton is defined as \(2000 \mathrm{lb}\), or \(2.000 \times 10^{3} \mathrm{lb}\). What is the difference in mass between a metric ton and an English ton expressed in pounds?
Problem 54
The distance from Earth to the Moon is \(2.39 \times 10^{5}\) miles, whereas the distance from the Moon to Mars is \(4.84 \times 10^{7}\) miles. What is the total distance from Earth to the Moon to Mars?
Problem 55
How many kilograms of lunar samples were brought back from the Moon by the Apollo 11 astronauts?
Problem 56
Did the Apollo 11 lunar samples contain water, or show evidence of life?
