An object of mass m is moving down an inclined plane that makes an angle they a with the horizontal and has height h. Which of the following statements is correct regarding its energy? A.)It is kinetic only. B.)It is kinetic and potential. C.)It is potential only. D.)Nione of the other choices is correct.
What region of the electromagnetic spectrum contains wavelengths the size of an atom? (10^-10 meters) What frequency does this wavelength correspond to?
in a car collision, the driver's body must change speed from a high value to zero. this is true whether or not an airbag is used, so why use an airbag? how does it reduce injuries
what zone has warm water and a lot of sunlight; ocean floor starts to slope downward? A. intertidal zone B. Neritic zone C. Oceanic zone D. benthic zone
the flame on a gas stove heats the bottom of a metal pot. (A) conduction (B)convection (C)radiation. the cold water in a metal pan is heated to the boiling point. (A) conduction (B)convection (C)radiation. the sun gives you a sunburn (A) conduction (B) convection (C) radiation
Which best defines transparent and provides an example of a material that is transparent to light? A. the ability to absorb light; for example, the leaf of a plant B. the ability to transmit light; for example, water C. the ability to reflect light; for example, gold D. the ability to refract light; for example, the diamond in a ring
A child holds up a silver spoon and is surprised to see her reflection there. Which interaction between light and matter explains this? A. When light hits something relatively flat, smooth, and shiny, it is transmitted by the surface, allowing nearby objects to be seen on the surface. B. When light hits something relatively flat, smooth, and shiny, it is refracted by the surface, allowing nearby objects to be seen on the surface. C. When light hits something relatively flat, smooth, and shiny, it bounces off the surface, allowing reflected objects to be seen on the surface. D. When light hits something relatively flat, smooth, and shiny, it is absorbed by the surface, allowing refracted objects to be seen on the surface.
Which determines the pitch of a sound? A. At the same amplitude, the sound with the most cycles per second will have the higher pitch. B. At the same amplitude, the sound with the fewest cycles per second will have the higher pitch. C. At the same wavelength, the sound with the most cycles per second will have the highest pitch. D. At the same wavelength, the sound with the fewest cycles per second will have the lowest pitch.
a pitcher threw a baseball straight up at 35.8 meters per second. what is the ball's velocity after 2.50 seconds?
In which type of wave do air particles move together or apart parallel to the direction of the wave? A.electromagnetic waves B.surface waves C.transverse waves D.sound waves
If an element is found in group 2 on the periodic table, what can you infer about its valence electron number, reactivity, and oxidation number?
Estimate the force on a 145-gram baseball if it hits the bat at 50 miles per hour and stays in contact with the bat for 0.1 second, during which time it reverses direction and leaves the bat at 75 miles per hour. Express the result in newtons and in pounds.
