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
What is the relationship between velocity and acceleration? Acceleration is the change in velocity over time. Velocity is the change in acceleration over time. Velocity and acceleration are equal and opposite. Velocity and acceleration have nothing to do with each other.
19. The process by which atomic nuclei spontaneously decay is called relative dating radioactivity erosion deposition 20. The time it takes for 50 percent of the nuclei in a radioactive sample to decay to its stable isotope is called the daughter product geologic time the half-life the half-time 21. The scientist who developed the theory of evolution was Harry Hess James Hutton Charles Darwin William Smith
Radloactive nuclel undergo decay because they are unstable. a TRUE b FALSE
Which of the following would cause a change in the speed of a sound wave? a the wave being made by a larger vibration b the wave moving through water C the wave changing medium from a gas to a liquid d the wave being made by a smaller vibration e none of the above
A man pulls a vacuum forward 13.6 m with a force of 33.9 N at a $55.0^{\circ }$ angle. How much work is being done to the vacuum by the man? $W=[?]J$
Select the cause of evaporation. Waves from the ocean Energy in the clouds Heat from the Sun Rain on the ground
True/False: The mass of the object affects the rate at which it falls. True False
If more force pushes two surfaces together, then the friction between the surfaces will __ stay the same increase decrease
Which of the following is the ideal way to apply pressure onto pedals? Gently at first and then with full force Stomping with force, so it reacts With your entire body weight behind it By pressing gradually
Select all of the types of electromagnetic waves that are ionizing radiation. gamma infrared microwave ultraviolet X-ray
