Archive day

March 24, 2026

1,470 public questions were asked on this day.

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In 1974, the Arecibo Radio Telescope in Puerto Rico sent the most powerful broadcast ever intentionally beamed into space. The transmission, which consisted of a simple pictorial message, was aimed at potential life form...
Asked by des 1 answer
What happens to the x-intercepts of the function y=x2−25 when the graph is reflected over the x-axis? Explain.(1 point) The x-intercepts remain the same because the y-values get negated during a reflection over the x-axi...
Asked by Alto saxaphone 1 answer
The table below describes an analog and a digital technology. Analog Storage: VHS Cassette Digital Storage: Hard Drive The thin plastic tape is embedded with particles of iron-oxide, which can be magnetized to store info...
Asked by des 1 answer
The image below shows a laser that has been shot into a solid block of transparent plastic from the far left end. Once inside the plastic block, the light is repeatedly reflected off of the sides until it reaches the opp...
Asked by des 1 answer
Choose the correct statement to describe a true relationship between any point on f(x) and −f(x) .(1 point) If (x,y) is on the graph of f(x) , then (−x,−y) is on the graph of −f(x) . If (x,y) is on the graph of f(x) , th...
Asked by Alto saxaphone 1 answer
How are a telegraph, a radio satellite, and a wireless computer network related? A. They are all outdated devices that were used to send digital signals using X-ray technology. B. They are a historical sequence of device...
Asked by des 1 answer
Jaylon works at a local hospital. He screens everyone who walks in the front door by taking their temperatures. Jaylon can take everyone's temperature with an analog thermometer or with a digital thermometer. analog ther...
Asked by des 1 answer
Which of the following best describes how wireless telephones are able to receive and produce sound from one person to another? A. Sound waves are received and then vibrate a speaker which produces additional sound waves...
Asked by des 1 answer
If the function f(x)=(x+3)2 is reflected over the x-axis, then how does the reflection affect the point (2,25) ?(1 point) In the reflection, the point (2,25) becomes (2,−25) . In the reflection, the point (2,25) becomes...
Asked by Alto saxaphone 1 answer
Which of the following is a true statement about waves? A. Waves are never affected when they interact with matter. B. Waves can transfer energy when they interact with matter. C. All waves travel longitudinally and comp...
Asked by des 1 answer
Sam is standing in an empty auditorium. He yells and hears his voice echo. What is happening to the sound to cause this echo? A. transmission of the sound waves within his ears B. reflection of sound waves off the walls...
Asked by des 1 answer
The diagram below shows a sound wave traveling from a mass of cold air into a mass of warm air. Judging from the diagram, which of the following statements is true? A. Sound travels at the same speed through both cold an...
Asked by des 1 answer
Scenes of outer space explosions in movies are often accompanied by a loud sound. Which of the following best describes why a scene like this is not realistic? A. Sound is not produced when something explodes in air. B....
Asked by des 1 answer
The diagram below shows two longitudinal waves, wave X and wave Y, at one instant of their motion. Each oval represents a particle acted on by the energy of the wave as it moves from left to right. The number of ovals ca...
Asked by des 1 answer
Two waves are traveling through a tube. Wave X has an amplitude of 1 cm, and wave Y has twice the amplitude of wave X. The energy of wave Y is A. one-fourth times that of wave X. B. two times that of wave X. C. half time...
Asked by des 1 answer
Water waves are hitting against a boat. If the frequency of water waves is reduced to one-third of the original frequency, what happens to the energy transferred to the boat? A. The energy transferred to the boat is redu...
Asked by des 1 answer
What is a wave frequency? A. the loudness of a wave as it travels though the air B. the height of a wave between peak and trough C. the speed that a wave is passed from particle to particle through a medium D. the number...
Asked by des 1 answer
Maria determines that the wavelength of a sound wave is 2.50 meters and that the wave is traveling at 340 m/s. What is the frequency of the sound wave? Hz
Asked by des 1 answer
A reference point is an object or location from which the movement of another object is determined. Which of the following could be a reference point? a moving car a person a point on a map a house
Asked by des 1 answer
An observer sees an airplane flying at a fast, constant speed along a straight path. However, a passenger inside the airplane feels that they are not moving at all. What explains the difference between what the observer...
Asked by des 1 answer
A ball is dropped from a tower. From whose reference point is the ball approaching the observer? A. a person in an airplane flying above the tower B. a person standing on the ground beneath the tower C. a person standing...
Asked by des 1 answer
How do you know if something is alive? Describe some of the characteristics of living things. 2. Humans, plants and mushrooms are all alive. What do these organisms have in common? Answer is one sentence each in a 8 grad...
Asked by Scveghc 1 answer
Kyle and Jon are both pushing the same box. Kyle is pushing to the right. Jon is pushing to the left. Which of these would make the box move to the left? A. Jon and Kyle push the box with the same amount of force. B. Kyl...
Asked by des 1 answer
The picture above shows a hockey puck traveling toward a hockey player in a straight line (dashed black line). If the hockey player hits the puck in the direction of the red arrow, A. the puck will stop. B. the puck will...
Asked by des 1 answer
How do you know if something is alive? Describe some of the characteristics of living things. 2. Humans, plants and mushrooms are all alive. What do these organisms have in common? Answer is one sentence each in a 7th gr...
Asked by Scveghc 1 answer