What is a system that does not exchange matter or energy with the environment? open system closed system conductive system thermal system
The concept of space-time compression means A) there is more space in smaller places than ever. B) distant places in the world are becoming effectively closer together. C) people no longer have time to read books. D) as an object moves faster through space, time slows for that object. E) today it is harder than ever to keep track of what is happening in distant places.
Light (electromagnetic radiation) and heat are classified as forms of matter. True False
A bicyclist, traveling with a constant speed, covers 89.0m in 730s. Determine all unknowns. bar (v)=square unit Delta x=square unit t=square square unit
Multiple Choice Question How might a container change if the substance inside of it undergoes a change in pressure? It might pop if the pressure decreases and might appear crushed if the pressure increases. It might appear crushed if the pressure decreases or increases. It might pop if the pressure decreases or increases. It might appear crushed if the pressure decreases and might pop if the pressure increases.
Answer the following questions to test your knowledge. Name the three things that affect centrifugal force. Mass, energy, vector Energy, radius, velocity Mass, speed, radius of turn
Answer the following questions to test your knowledge. Which road condition makes for more friction? Dry and sticky Snowy and wet Oily and slimy
Pop Quiz Answer the following questions to test your knowledge. What happens when you use a lower gear when driving downhill? It helps you to steer better. It helps to control your speed. It wears your brakes down quicker.
Para enfriar un trozo de cristalería caliente debes colocarlo en agua fría. falso cierto
When adding or subtracting measured quantities, what determines the number of significant figures in the result?
$\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.
