Which condition causes ocean salinity to decrease? A. low levels of evaportation B. thawing of polar ice caps C. ocean water flowing into rivers D. low levels of precipitation
Which explanation of the solar system best fits the observations of the planets and how they orbit the sun? A. The gravity of a large, massive star passing the sun ripped off blobs of material from it that formed the planets B. The planets formed at the center of a collapsing spinning cloud of gas and dust C. The sun and planets formed from a collapsing spinning cloud of gas and dust. D. A comet hit the sun and sent off fragments the became the planets. I'm pretty sure it's C?
A mechanic uses a mechanical lift to raise a car. The car weighs 11,000 N. The lift raises the car 2.5 m. How much work is required to accomplish this task? A. 27,500 J B. 4400 J C. 2.27 x 10-4 J D. 22,500 J
7th Grade Sophie measures the temperature of water every minute as it is heating. After a few minutes, the temperature is 82 degrees Celsius. How far below the boiling point of water is this? A.)18 degrees Celsius B.) 191 degrees Celsius C.) 130 degrees Celsius D.) 8 degrees Celsius
Why does friction increase as speed increases?? i really need help with my homework, and please can you explain using the big idea of particles
2. A car accelerates uniformly from +10.0 m/s to +50.0 m/s over a distance of 225 m. How long did it take to go that distance? Show all your work, including the equation used, given and unknown quantities, and any algebra required. Make sure your answer has the correct number of significant figures.
Which accurately describes the behavior of sound and light in the vacuum of space? A. A vacuum is a type of medium. Sound, which is a type of mechanical wave and requires a medium, will travel there. Light, which travels as electromagnetic waves and does not require a medium, will not travel there. B. A vacuum does not contain a medium. Light, which is a type of mechanical wave and requires a medium, will not travel there. Sound, which travels as electromagnetic waves and does not require a medium, will travel there. C. A vacuum is a type of medium. Sound, which is a type of mechanical wave and does not require a medium, will travel there. Light, which travels as electromagnetic waves and does require a medium, will also travel there. D. A vacuum does not contain a medium. Sound, which is a type of mechanical wave and requires a medium, will not travel there. Light, which travels as electromagnetic waves and does not require a medium, will travel there.
Which object absorbs the most colors of light? A. an orange ceramic cup B. a gray stone C. a black roof D. a white T-shirtcan someone please help me
Which type of wave does not require a medium to travel through? A. wave created by x-rays as they create an image of a bone B. wave created by plucking the strings of a guitar C. wave created by dropping a pebble in water D. wave created by squeezing and releasing a spring
1.In what type of wave is the vibration perpendicular to the direction of travel of the wave. ____ 2.What type of wave vibrates p,arallel to the direction of travel? ______ 3.What type of wave contains compressions and rarefactions? _____ 4.What type of wave is produced when you move one end of a horizontal spring up and down?_____ 5.What type of wave has a wavelength? ____
the ____ is a measure of the number of waves that pass a point in a given amount of time fill in the blank
Awnser these 1. Why cant you calculate the frequency of the wave in a diagram what info is missing 2. the distance from one crest to an other crest is the ____
An arrow is shot horizontally at a speed of 40m/s from a bow held 1.5 meters above the ground. It misses the target and hits the ground.
fill in the blank _____ waves occur when the motion of the medium is parallel to the direction of the wave
