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Unkownk uk
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Unkownk uk
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What is the effect of using this inclined plane? (1 point) Responses The object can be lifted while being pushed over a shorter distance. The object can be lifted while using a downward force. The object can be lifted with less force. The object can be
lmao i broke it
Lifting the weight without a pulley requires a force of 400 newtons over a distance of 4 meters. How do these values change when the pulley is applied? The force increases, while the distance decreases. Both the force and the distance decrease. Both the
Which advantage does a screw have over a nail? A screw is pushed through a shorter distance. A screw is able to reduce the total amount of work needed. A screw allows the force to be applied in a more convenient direction A screw can be inserted with less
A student performs an experiment by ringing a bell in the air and in a pool and measuring the time it takes for a friend to hear the bell. In one or two sentences, make and justify a hypothesis on which medium the friend would hear the bell the fastest.
The formula vw=f⋅λ describes the relationship between the speed of a wave (vw ), and its frequency (f ) and wavelength (λ ). For example, if a wave has a frequency of 120 Hz and a wavelength of 5m, it would have a speed of 600 m/s. In one or two
AM waves have a wavelength of approximately 100 meters. FM waves have a wavelength of approximately 1 meter. Which one has a higher frequency? Which one has higher energy? FM has a higher frequency, but AM is higher energy. FM has a higher frequency, but
Which type of wave can travel through a vacuum? mechanical sound seismic light
During a baseball game, the sound of the bat hitting the ball can be heard in most parts of the stadium. That sound is weaker at greater distances. What is the cause of this phenomenon? The sound waves are blocked by people in the stadium. The sound waves
A student puts a piece of black paper and a piece of white paper in the same sunny spot. After 30 minutes, she observes that the black paper feels warmer than the white paper. Which best explains the student’s observation? The black paper prevents waves
A builder wants to make a room soundproof in a new home. The builder should use materials that _____. reflect sound waves and create echoes reflect sound waves and prevent echoes absorb sound waves and prevent echoes absorb sound waves and create echoes
A room with which type of surface will most likely produce an echo? carpet glass dirt foam
A student drops a rock in a pond and notices that her reflection in the water becomes less clear. Which statement best explains the student’s observation? The water is not a smooth surface after the rock is dropped in the pond. The water is not a smooth
How are visible light, the electromagnetic spectrum, and photoreceptors in the eye related? Photoreceptors in the eye detect the electromagnetic spectrum, which contains a range known as visible light. Photoreceptors in the eye detect the electromagnetic
How are sound waves different from light waves? Sound waves are mechanical waves that can travel through a medium or through a vacuum, while light waves are electromagnetic waves that can only travel through a medium. Sound waves are mechanical waves that
These are not the right questions noir the answers for my test.
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