New Worksheet - Science - Speed of Sound

Formulas
frequency = speed of sound / wavelength
speed of sound = (331.5 + 0.60 x temperature of air in Celsius) m/s

Directions
Using the formulas listed above, solve the following problems. Round approximate answers to 2 digits after the decimal.

Problem 1
A sound wave traveling through 21º C air has a wavelength of 2.75 meters. What is the frequency of the sound wave?
Answer: _________________________

Problem 2
A jet aircraft is traveling at mach 3.5 through air at 3ºC. What is the jet's speed in m/sec?
Answer: _________________________

Problem 3
What is the frequency of a wave that travels at a speed of 4 m/s and has a wavelength of 1.2 m?
Answer: _________________________

Problem 4
What is the wavelength of a wave that travels at a speed of 5 m/s and has a frequency of 2.4 Hertz?
Answer: _________________________

Problem 5
What is the speed of a wave that has a wavelength of 2.75 m and a frequency of 3.7 Hertz?
Answer: _________________________

Problem 6
What is the wavelength of a wave that travels at a speed of 15 m/s and has a frequency of 4.6 Hertz?
Answer: _________________________


© 2018 Laura Glassel – lizzietutoring.blogspot.com

New Worksheet - Science - Bohr Models

Directions
Give the information about what the Bohr model says the following atoms looks like.
The number listed after the chemical symbol is the mass number.
(Electron capacity for each orbit: orbit 1 is 2 electrons; orbit 2 is 8 electrons; orbit 3 is 18 electrons; orbit 4 is 32 electrons; orbit 5 is 50 electrons).

1. H – 1
number of protons ________
number of neutrons ________
number of electrons in orbit 1 ________
number of electrons in orbit 2 ________
number of electrons in orbit 3 ________
number of electrons in orbit 4 ________
number of electrons in orbit 5 ________

2. He – 4
number of protons ________
number of neutrons ________
number of electrons in orbit 1 ________
number of electrons in orbit 2 ________
number of electrons in orbit 3 ________
number of electrons in orbit 4 ________
number of electrons in orbit 5 ________

3. Li – 7
number of protons ________
number of neutrons ________
number of electrons in orbit 1 ________
number of electrons in orbit 2 ________
number of electrons in orbit 3 ________
number of electrons in orbit 4 ________
number of electrons in orbit 5 ________

4. Na – 23
number of protons ________
number of neutrons ________
number of electrons in orbit 1 ________
number of electrons in orbit 2 ________
number of electrons in orbit 3 ________
number of electrons in orbit 4 ________
number of electrons in orbit 5 ________

5. Cl – 35
number of protons ________
number of neutrons ________
number of electrons in orbit 1 ________
number of electrons in orbit 2 ________
number of electrons in orbit 3 ________
number of electrons in orbit 4 ________
number of electrons in orbit 5 ________

6. Cu – 64
number of protons ________
number of neutrons ________
number of electrons in orbit 1 ________
number of electrons in orbit 2 ________
number of electrons in orbit 3 ________
number of electrons in orbit 4 ________
number of electrons in orbit 5 ________


© 2018 Laura Glassel – lizzietutoring.blogspot.com

New Worksheet - Science - Protons, Electrons, and Neutrons

Directions
List how many protons, electrons, and neutrons each atom has.
Note: the number listed is the mass number.

1. Br – 78
protons: ________
electrons: ________
neutrons: ________

2. Sr – 85
protons: ________
electrons: ________
neutrons: ________

3. Mg – 22
protons: ________
electrons: ________
neutrons: ________

4. Si – 29
protons: ________
electrons: ________
neutrons: ________

5. Se – 77
protons: ________
electrons: ________
neutrons: ________

6. O – 16
protons: ________
electrons: ________
neutrons: ________

7. K – 38
protons: ________
electrons: ________
neutrons: ________

8. Hf – 177
protons: ________
electrons: ________
neutrons: ________

9. Pt – 195
protons: ________
electrons: ________
neutrons: ________

10. Cs – 133
protons: ________
electrons: ________
neutrons: ________


© 2018 Laura Glassel – lizzietutoring.blogspot.com

New Worksheet - Science - Newton's Law of Universal Gravitation

1. The gravitational force between two objects (mass 1 = 50 kg, mass 2 = 25 kg) is measured when the objects are 15 centimeters apart. The masses are then changed to mass 1 = 5 kg, mass 2 = 50 kg, and the distance between them is increased to 30 cm. How does the gravitational attraction compare to the first one that was measured?
Answer: _______________________

2. The gravitational force between two objects (mass 1 = 100 kg, mass 2 = 35 kg) is measured when the objects are 40 centimeters apart. The masses are then changed to mass 1 = 25 kg, mass 2 = 5 kg, and the distance between them is changed to 160 cm. How does the gravitational attraction compare to the first one that was measured?
Answer: _______________________

3. The gravitational force between two objects (mass 1 = 55 kg, mass 2 = 60 kg) is measured when the objects are 40 centimeters apart. The masses are then changed to mass 1 = 5 kg, mass 2 = 120 kg, and the distance between them is changed to 60 cm. How does the gravitational attraction compare to the first one that was measured?
Answer: _______________________

4. The gravitational force between two objects (mass 1 = 30 kg, mass 2 = 5 kg) is measured when the objects are 25 centimeters apart. The masses are then changed to mass 1 = 90 kg, mass 2 = 15 kg, and the distance between them is changed to 75 cm. How does the gravitational attraction compare to the first one that was measured?
Answer: _______________________

5. The gravitational force between two objects (mass 1 = 15 kg, mass 2 = 7 kg) is measured when the objects are 32 centimeters apart. The masses are then changed to mass 1 = 60 kg, mass 2 = 49 kg, and the distance between them is changed to 4 cm. How does the gravitational attraction compare to the first one that was measured?
Answer: _______________________

6. The gravitational force between two objects (mass 1 = 2 kg, mass 2 = 10 kg) is measured when the objects are 5 centimeters apart. The masses are then changed to mass 1 = 8 kg, mass 2 = 40 kg, and the distance between them is changed to 25 cm. How does the gravitational attraction compare to the first one that was measured?
Answer: _______________________

7. The gravitational force between two objects (mass 1 = 90 kg, mass 2 = 15 kg) is measured when the objects are 75 centimeters apart. The masses are then changed to mass 1 = 45 kg, mass 2 = 5 kg, and the distance between them is changed to 15 cm. How does the gravitational attraction compare to the first one that was measured?
Answer: _______________________

8. The gravitational force between two objects (mass 1 = 20 kg, mass 2 = 10 kg) is measured when the objects are 16 centimeters apart. The masses are then changed to mass 1 = 60 kg, mass 2 = 5 kg, and the distance between them is changed to 4 cm. How does the gravitational attraction compare to the first one that was measured?
Answer: _______________________

9. The gravitational force between two objects (mass 1 = 5 kg, mass 2 = 15 kg) is measured when the objects are 30 centimeters apart. The masses are then changed to mass 1 = 60 kg, mass 2 = 45 kg, and the distance between them is changed to 3 cm. How does the gravitational attraction compare to the first one that was measured?
Answer: _______________________

10. The gravitational force between two objects (mass 1 = 25 kg, mass 2 = 65 kg) is measured when the objects are 80 centimeters apart. The masses are then changed to mass 1 = 50 kg, mass 2 = 5 kg, and the distance between them is changed to 20 cm. How does the gravitational attraction compare to the first one that was measured?
Answer: _______________________



© 2017 Laura Glassel – lizzietutoring.blogspot.com