What is the apparent power of anAC circuit with a source voltage of 240V and a total current of 15A? 1.200W 2.400W 3.600W 7.200W
5. Two rods one made of brass and other made of copper are to be joined end to end. The length of the brass section is 0 .2 meters long. The length of the copper section is 0.7 meters long. Both rod sections have cross section of 0.004 square meters . The free end of the brass segment is in boiling water. The free end of the copper section is in an ice -water mixture. The pressure is one atmosphere for both rods The sides of the rods are insulated perfectly. No heat can leave the sides of the rods over the length of the rods.Please calculate the temperature of the point where the two rods are connected . Thank you.
Glass beads need to be placed in the balance tube when analyzing ; low surface area materials (one meter squared per gram or less). True False
Where would the gravitational force be the greatest? A At the beach on the East Coast C All the top of I a mountain At the bottom of the ocean B At the surface of the moon
Where does the ball feel the MOST centripetal force? Closest to the center It does not matter where the ball is , the same force is applied. Farthest from the center
A flat straight line shows the object's velocity is a. Increasing b. Decreasing c. Staying the same d. Has stopped
The event horizon of a black hole marks the inner boundary of a planetary nebul is a crystalline layer. is believed to be a singularity. has a radius equal to the Schwarzschild radius.
The amount of heat in an arc flash will instantly vaporize copper and expand it __ times its original volume. 54,000 74,000 64,000 44,000
Solid forms of ice last longer because there is more weight with less surface area. True False
The pressure you apply to the gas pedal is known as what? velocity force motion
$\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.
