Instructions: Read each question carefully. Answer all questions in the space provided. Choose your level (Basic.Intermediate, or Advanced) based on your confidence. 1. What is a diffraction grating? __ 2. Who is credited with inventing the diffraction grating? __ 3. What do spectroscopes help astronomers study? __ 4. How did the invention of the diffraction grating improve astronomical observations compared to earlier methods? __ 5. What important discovery in astronomy was made possible by using spectroscopes with diffraction gratings? __ 6. Discuss how spectroscopic analysis using diffraction gratings has contributed to

Section 3:Graphing &Variables Consider the following data on spring extension: Mass (g) Length (cm) 0 13.7 10 14.5 20 15.3 30 16.0

What are electrons in Schrodinger's quantum mechanical model? a) Wave-particles b) Particles c) Waves d) Energy levels

Why is a sandy shore hot on a summer day? A. The sand is heated through thermal conduction. B. The sand is heated through radiation. C. The sand is chemically heated. D. The sand is heated through convection.

Analyze the statement: "All planets orbit the sun in the same amount of time." Is this statement True or False? Justify your answer with a brief explanation.

Which option is the appropriate scientific unil for distance? (1 point) mile loot meter yard

Accuracy, refers to the smallest interval that can be measured. True False

What is a gram used to measure? volume mass time distance

Which is longer? 1000 mL 1000 m 10000 mg 100 cm

History of the Atom Quiz 1) Thomson model of the atom should include neutrons True False

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$\square $ Answer Bank KE: 1000.0 J PE: 3000.0 J KE: 0J $PE:4000.0J$ KE: 2000.0 J PE: 2000.0 J KE: 4000.0 J PE: 0J

Learning Log: How do you think you get something to have more kinetic energy?

If a UV light unit has four lamps in it, and each lamp is 7-watt, it is known as a __ 7-watt unit 28-watt unit 11-watt unit 3-watt unit

10. What is the mass of a meteorite that is traveling towards Earth at $1,760m/s$ with a momentum of $33,400kgm/s$

Where is the energy coming from in the lab (where does it start)? A Potential energy in the Cheeto B Potential energy in the water C Kinetic energy inside the water D Kinetic energy in the Cheeto

What should happen to the temperature of the water? A It stays the same B It goes down C It goes up

9. Your local weather report announces that the barometric pressure is 30.44 inHg. Convert this pressure to psi, atm torr, and Pa.

Express the temperature, 275.18 K in degrees Celsius. $548.33^{\circ }C$ $274.17^{\circ }C$ $2.03^{\circ }C$ $120.88^{\circ }C$ $22.78^{\circ }C$

Hubble's Law has led physicists and astronomers to the hypothesis that the universe is expanding. True False

Newton determined that the force of gravity on an object is proportional to its mass causing its mass to be canceled out (Newton's second law) and resulting in a constant acceleration. If the laws of physics are universal, then Newton should be able to apply his discoveries about gravity on Earth to the motion of the planets in our Solar System. Newton's third law says that for every force there is an equal reaction force in the opposite direction. What does this imply about the force of gravity associated with a person standing on the Earth? Choose one: A. The force of gravity on the person cancels out to zero. B. The Earth's gravity pulls downward on the person but also pushes upward on them. C. The Earth's gravity pulls downward on the person, and the person's gravity pulls upward on the Earth. D. There is twice as much gravitational force on the person than there would be if it weren't for Newton's third law.