What do these two changes have in common? sanding a piece of wood water evaporating from a puddle Select all that apply. Both are only physical changes. Both are caused by cooling. Both are changes of state. Both are chemical changes.

What challenge to sailing long distances over open ocean did the innovation of the spherical astrolabe help with? Large ocean swells (waves) breaking ships hulls Tracking the ship's location latitudinally (north-south) Having an adequate supply of fresh water for a voyage of indeterminate length Crossing the area known as the doldrums in which windspeed stays near zero

2. What characteristic distinguishes Neptune from the other planets? Neptune is extremely cold. Neptune is the largest planet. Neptune is extremely windy Neptune is blue.

What should you consider when choosing an arrow to match your bow? The weight of the arrow The material of the arrow The thickness of the arrow The sell date of the arrow

Which two technological inventions did Archimedes discover? lever water mill aqueduct odometer highway

What is the unit for Temperature square B This is a required question

Refrigerants release heat: Select one: A. By rearranging their molecular structure to form a new compound. B. By evaporating from a liquid to a vapor. C. By converting refrigerant molecules into heat energy. D. By condensing from a vapor to a liquid.

An important step in science is supporting a theory or idea with data. The questions we ask help determine the type of data we collect In the warm up , you reviewed the equation to calculate kinetic energy. What question could you ask about kinetic energy which will include the variables that affect it? square

A car accelerates from 6.00m/s to 20.0m/s This takes place over 50.0 meters. What is its rate of acceleration? 4.63m/s^2 4.36m/s^2 4.06m/s^2 3.64m/s^2

What helps the protons and neutrons come together. Large amounts of gas Density and heat

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.