Which of these BEST describes a vacuum? an area in space that contains ALL matter a space that has no particles of matter

18. Which of the following is true about speed? a) speed doesn't include direction and velocity does b) speed is a vector and velocity is a scalar quantity c) speed is used when determining acceleration d) speed is a qualitative measurement

Question: Braking results in weight transfer: Options: Backward Forward To the right To the left

1. Which unit is used to measure mass in the metric system? Pound Slug Ounce Gram

A photon has the energy 5.55times 10^-19J What is this photon's wavelength in nanometers? A 358 nm B ) 590 nm C 3.58times 10^-7nm c D 222 nm

The work done by a friction force is: a. always positive b. always negative c. always zero d. either positive or negative depending upon the situation

Can you place a soda in the ice to make your drinks cold? Yes No

Select the correct answer. How was Rutherford's gold foll experiment inconsistent with the plum pudding model of the atom? A. The model could not explain how alpha particles could be deflected at large angles. B. The model could not explain how alpha particles could penetrate the atoms. C. The model could not explain why the electrons in the atom would be evenly spaced. D. The model could not explain why alpha particles passed through the nucleus without any deflection.

The effects of an airbag are always helpful in a crash,no matter how or where a passenger is seated. True False

Which object measures atmospheric pressure? a ballast tank a barometer a thermometer

Hot Questions

$\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.