PHYSICS MIDDLE SCHOOL

For a machine, the input force is 30 N, and the input distance is 2 m. Factoring in the effect of friction, what must be true about the work output? A. It must be greater than 60 J
B. It equals 60 J.
C. It must be less than 60 J

Answers

Answer 1
Answer:

Answer:

C. It must be less than 60 J

Explanation:

The work going into the machine is the product of the force and distance:

W = Fd

W = (30 N) (2 m)

W = 60 J

The work out of the machine is less than this due to the frictional losses.

Answer 2
Answer:

Answer:

C. It must be less than 60 J


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COLLEGE

A 372-g mass is attached to a spring and undergoes simple harmonic motion. Its maximum acceleration is 17.6 m/s2 , and its maximum speed is 1.75 m/s. a)Determine the angular frequency. b)Determine the amplitude. c)Determine the spring constant.

Answers

Answer with Explanation:

We are given that

Mass , m=372 g=

1 kg=1000g

Maximum acceleration, a=

Maximum speed ,v=1.75 m/s

a.We know that

Maximum acceleration, a=

Maximum speed, v=

Angular frequency,

b.Substitute the value of angular frequency

Hence, the amplitude=0.17 m

c.Spring constant,k=

Using the formula

Hence, the spring constant,k=37.6 N/m

MIDDLE SCHOOL

What happens when a hurricane makes landfall? A. A hurricane will weaken after making landfall. B. A hurricane will pick up speed after making landfall. C. A hurricane will have stronger wind speeds after it makes landfall. D. A hurricane will have a smaller storm surge after It makes landfall. Brainly

Answers

Hurricanes are intense storm in tropic regions. When hurricane makes landfall it will loss its strength and weakens . Hence option A is correct.

What is hurricane ?

Hurricanes are powerful storms with a tropical origin. Small groups of disorganized storms that collect energy from the heat of the ocean water are the precursors to hurricanes.

Individual clouds will start to group together into a single storm if specific atmospheric conditions are met. The organization of the cloud clusters will intensify, and the winds will pick up and move around a particular point, the eye, if the storm keeps consuming heat from the ocean.

It is also recognized that hurricane-related extreme atmospheric conditions can give rise to tornadoes. Because they are no longer able to draw energy from the ocean when a storm makes landfall, they start to weaken. They can still harm a lot and are harmful nonetheless.

Find more on hurricanes :

brainly.com/question/13661501

#SPJ5

Answer:

a

Explanation:

it has no more water to make it bigger

HIGH SCHOOL

Which of the following forms of light can be observed with telescopes at sea level? Select all that apply.
X rays
ultraviolet light
visible light
infrared light
radio waves

Answers

Answer:

Options (4) and (5)

Explanation:

At the sea level, lights that are comprised of higher wavelength, i.e. wavelength that are greater than the wavelength of ultraviolet lights, can be observed with the help of telescopes. It is because, the lights with greater wavelength can easily penetrate through the different layers of atmosphere.

The type of lights such as radio-wave and infrared light (IR) are observed at the sea level by the use of telescope.

Thus, the correct answers are options (4) and (5).

Answer:

visible light

radio waves

Explanation:

Idkk

MIDDLE SCHOOL

The moon does not have atmosphere. Why?​

Answers

Answer: It doesn't because it's not that big.

Explanation:

Answer:

One characteristic of the moon of Earth is that it basically has no atmosphere. The Earth has an atmosphere rich in Nitrogen and Oxygen but on the moon the surface is directly exposed to outer space. There are three reasons why the moon has no atmosphere. The primary reason is because the moon is too small. Compared to the Earth, the moon is about 1/4th the size. This reduces the amount of gravity on the moon. Strong gravity is needed to hold an atmosphere into place. With weak gravity, gases that are emitted from the surface quickly are lost to outer space. Another reason is because the moon does not currently experience plate tectonics and geologic upwelling. Plate tectonics allows for a recycling of crust and convergence and divergence of plates occurs and this leads to volcanoes and gases escaping at the boundaries. The moon is said to be geologically dead. There are currently no significant processes that allow for abundant gases to supply an atmosphere. The early moon may have had an atmosphere when it was geologically active but the crust of the moon is currently “frozen” into place and thus there are very little gases being emitted as compared to Earth. Another reason is because the moon is relatively close to the sun. This reason is tied closely to the moon having weak gravity. The solar wind from the sun helps strip away a weak atmosphere. Earth and Venus do not suffer the same fate since the gravity is high enough to hold the atmosphere in place. There are other moons in the outer solar system that are better able to hold an atmosphere due to being further away from the sun among other reasons.  

Explanation:

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