2A hw – 1 SI Units, Conversions and Estimations 1. Convert the following units: b. 230 cm? to m². c. 120 mph to m/s a. 150 km/hr to m/s. d. 68 m³ to cm³. e. 5.0 L to m³. 2. The density of water is p= 1000 kg/m³. Express the density in g/cm³. 3. The density of mercury is 13.6 g/cm³. Express the density in kg/m³. 4. Express a light year (the distance that light travels in a year) in meters. Take the speed of light in vacuum to be 3.0 × 108 m/s. Use scientific notation. 5. Pulsars, or neutron stars, typically have a radius of 20 km and a mass equal to that of our sun (2.0 × 1030 kg). What is the average density of such a pulsar? Use SI units and scientific notation. 6. Estimate the distance traveled by our planet around the Sun in 10 years, if the distance between the sun and earth is about 1.5 x 1011 m, (called an astronomical unit AU) and the path is circular. Use SI units and scientific notation for your answer. 7. Gravitational accelerations in the galaxy are usually very small: our sun, for -as it orbits the Milky Way. example, experiences the acceleration of about 2 Express this acceleration in mi/s² (1 A=10-1º m). 8. Under normal conditions, there are about 1019 particles in 1.0 cm of air. Estimate the number of particles present in your bedroom. 9. Estimate the number of water molecules in a 250 cm glass of water. Each molecule's dimension is about 3.0 x 10-10 m (3.0 Å). 4257 10. The area of a human is approximately given as A(m,h)=.0072m*h where m is his/her mass (kg) and h is his/her height (cm). Estimate your surface (in m²), area. 11. The number of protons in the known universe is about 1080, and the radius of a proton is about 10-15 m. Estimate the volume of a sphere containing all of these protons if they were placed in contact with each other? 10 make - up labs or activities am ame
2A hw – 1 SI Units, Conversions and Estimations 1. Convert the following units: b. 230 cm? to m². c. 120 mph to m/s a. 150 km/hr to m/s. d. 68 m³ to cm³. e. 5.0 L to m³. 2. The density of water is p= 1000 kg/m³. Express the density in g/cm³. 3. The density of mercury is 13.6 g/cm³. Express the density in kg/m³. 4. Express a light year (the distance that light travels in a year) in meters. Take the speed of light in vacuum to be 3.0 × 108 m/s. Use scientific notation. 5. Pulsars, or neutron stars, typically have a radius of 20 km and a mass equal to that of our sun (2.0 × 1030 kg). What is the average density of such a pulsar? Use SI units and scientific notation. 6. Estimate the distance traveled by our planet around the Sun in 10 years, if the distance between the sun and earth is about 1.5 x 1011 m, (called an astronomical unit AU) and the path is circular. Use SI units and scientific notation for your answer. 7. Gravitational accelerations in the galaxy are usually very small: our sun, for -as it orbits the Milky Way. example, experiences the acceleration of about 2 Express this acceleration in mi/s² (1 A=10-1º m). 8. Under normal conditions, there are about 1019 particles in 1.0 cm of air. Estimate the number of particles present in your bedroom. 9. Estimate the number of water molecules in a 250 cm glass of water. Each molecule's dimension is about 3.0 x 10-10 m (3.0 Å). 4257 10. The area of a human is approximately given as A(m,h)=.0072m*h where m is his/her mass (kg) and h is his/her height (cm). Estimate your surface (in m²), area. 11. The number of protons in the known universe is about 1080, and the radius of a proton is about 10-15 m. Estimate the volume of a sphere containing all of these protons if they were placed in contact with each other? 10 make - up labs or activities am ame
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter1: Getting Started
Section: Chapter Questions
Problem 4PQ: How many cubic centimeters (cm3) are in one cubic meter (m3)?
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Transcribed Image Text:2A hw – 1
SI Units, Conversions and Estimations
1. Convert the following units:
b. 230 cm? to m².
c. 120 mph to m/s
a. 150 km/hr to m/s.
d. 68 m³ to cm³.
e. 5.0 L to m³.
2. The density of water is p= 1000 kg/m³. Express the density in g/cm³.
3. The density of mercury is 13.6 g/cm³. Express the density in kg/m³.
4. Express a light year (the distance that light travels in a year) in meters. Take the
speed of light in vacuum to be 3.0 × 108 m/s. Use scientific notation.
5. Pulsars, or neutron stars, typically have a radius of 20 km and a mass equal to that
of our sun (2.0 × 1030 kg). What is the average density of such a pulsar? Use SI
units and scientific notation.
6. Estimate the distance traveled by our planet around the Sun in 10 years, if the
distance between the sun and earth is about 1.5 x 1011 m, (called an astronomical
unit AU) and the path is circular. Use SI units and scientific notation for your
answer.
7. Gravitational accelerations in the galaxy are usually very small: our sun, for
-as it orbits the Milky Way.
example, experiences the acceleration of about 2
Express this acceleration in mi/s² (1 A=10-1º m).
8. Under normal conditions, there are about 1019 particles in 1.0 cm of air. Estimate
the number of particles present
in
your bedroom.
9. Estimate the number of water molecules in a 250 cm glass of water. Each
molecule's dimension is about 3.0 x 10-10 m (3.0 Å).
4257
10. The area of a human is approximately given as A(m,h)=.0072m*h
where m is his/her mass (kg) and h is his/her height (cm). Estimate your surface
(in m²),
area.
11. The number of protons in the known universe is about 1080, and the radius of a
proton is about 10-15 m. Estimate the volume of a sphere containing all of these
protons if they were placed in contact with each other?
10
make - up labs or activities
am
ame
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