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
Fire the catapult at the lowest cup position What is the distance achieved? About 635 About 357
If Jerome is swinging on a rope and transferring energy from gravitational potential energy to kinetic energy, what is being done? compression work radiation energy creation
Which word or phrase best describes entropy? disorder order kinetic energy force
What are most semiconductors made from? aluminum copper iron silicon
At which temperature does all molecular motion stop? OR $0^{\circ }C$ OK $0^{\circ }F$
Which statement about the volume and pressure of a gas is the most accurate? Volume of a gas is directly proportional to pressure of that gas in any container. Volume of a gas is inversely proportional to pressure of that gas in any container. Volume of a gas is always greater than pressure of that gas in any container. Volume of a gas is equal to pressure of that gas in any container.
CER: Make a claim about which type of material (dark or light)increases in temperature more when exposed to light energy Use evidence and scientific reasoning from class to support your answer. Your answer
In a transverse wave the wavelength can be measured as the distance between two adjacent compressions. TRUE FALSE
The slope of a linear velocity vs time graph tells us the __ of the object. displacement velocity speed acceleration
What is the first nucleus of an atom shown as? a fuzzy cloud a mass of protons and neutrons a solid mass surrounded by electrons a mass of protons
