A nerve impulse travel along a myelinated neuron at 75.9 m/s

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Which of the following statements about matter is true? Mass and matter are always the same. Matter is made up of atoms and has mass. Mass can decrease while matter increases. Matter does not exist in the biosphere.

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The correct answer is Matter is made up of atoms and has mass.

Select all that apply.There is no sound in the vacuum of space. Why?
Sound must travel through something that vibrates.
There is no energy in space.
There is no air to vibrate the human eardrum.
Space is too full of light energy.

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Answer:

Sound must travel through something that vibrates.

There is no air to vibrate the human eardrum.

Explanation:

Waves can be divided into two types:

- Electromagnetic waves: these are waves produced by the oscillations of electric and magnetic field. This type of wave does not need a medium to propagate, so they can also travel through a vacuum

- Mechanical waves: these are waves produced by the vibrations of the particles in a medium - therefore, they do need a medium to propagate. Sound waves are part of this type, so they cannot travel through a vacuum.

According to these definitions, we can say that the correct choices are the following:

Sound must travel through something that vibrates. --> because they are mechanical waves

There is no air to vibrate the human eardrum. --> because they are mechanical waves

1. Sound must travel through something that vibrates.
and
3. There is no air to vibrate the human eardrum.

Extremely high temperatures and pressures are necessary for fusion reactions to take place in stars. true or false.

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That statement stands unique in its simple veracity and truthiness.

What is true about discipline

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discipline will inprove your profoments - mithbusters

Describe the relationship between the weight of water in the catch bucket and the object in the beaker. A. The weight of the volume of the water is less than the buoyant force of the object. B. The weight of the volume of the water is equal to the buoyant force of the object. C. The weight of the volume of the water is greater than the buoyant force of the object. D. The weight of the volume of the water is not a factor in the buoyant force of th

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The statement which best describe sthe relationship between the weight of water in the catch bucket and the object in the beaker is definitely B. The weight of the volume of the water is equal to the buoyant force of the object, according to the Archimedes' principle in which is said that weight of the fluid that would occupy the column is equal to water. I am pretty sure it will help.

What do ultrasounds use?radio waves
ultraviolet waves
light waves
sound waves

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Ultrasounds are used in the medical profession for the purpose of diagnosis. Ultrasounds uses high frequency sound waves. Thus, the correct option is D.

What are Ultrasounds?

Ultrasound are the sound waves with frequencies which are higher than the upper audible limit of normal human hearing. Ultrasound is not different from normal audible sound frequencies in its physical properties, except that humans cannot hear these sound.

Ultrasound is used in diagnostics where it is also called as sonography or diagnostic medical sonography. It is an imaging method which uses sound waves to produce images of structures within the body of a person. The images produced can provide valuable information for the purpose of diagnosing and directing treatment for a variety of diseases and conditions.

Therefore, the correct option is D.

Learn more about Ultrasound here:

brainly.com/question/14902329

#SPJ2

Answer:

D. sound waves

Explanation:

on edg

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Please help ASAPa substance of mass 10kg with the dimension as 5cm by 4cm by 10cm. What is the density of true substance?

Mike has a mass of 97 kg. He jumps out of a perfectly good airplane that is 2000 m above the ground. After he falls 1000 m, when his downward speed is 68 m/s, Mike opens his parachute. The positive y-direction is downward.(a) Calculate the average magnitude of the upward force of the air resistance on Mike during his initial descent.(b) After Mike opens his parachute, he continues to descend, eventually reaching the ground with a speed of 4.0 m/s. Calculate the average upward force during this part of Mike's descent.(c) At the same time Mike jumps out of the airplane, his wallet (mass of 0.3 kg) falls out of his pocket. Calculate the wallet's downward speed when it reaches the ground. For this calculation, assume that air resistance is negligible.

The focal length is the distance from the midline of the lens to the _____.imageobjectfocal point2F position

A ball rolls down an incline with an acceleration of 10 cm/s^2. If it starts with an initial velocity of 0 cm/s and has a velocy of 50 cm/s when it reaches the bottom of the ramp, how long is the ramp?