5. A spring balance is used to weigh a fish. The combined mass of the fish and the pan is 1.50
kg. If the spring constant is 1200 N/m. What distance does the spring stretch?

Answer:

leaf margins

Explanation:

Scientists study ice cores and leaf margins to learn about the past climates.

Further explanation :

Leaf margins are an indicator of the temperature in which a tree lives or lived. Paleobotanists use the margins of fossil leaves to infer past temperatures.

Answer:

Snail shells

Explanation:

Yea surprising answer but like this is from the web -> "New research shows that snail shells retain their carbon and oxygen isotope signatures after being boiled and, through those proxies, likely still preserve an accurate record of past temperature, rainfall, and vegetation."    

Sorry if wrong and hope it helps!  :)

The statement D best describes the position of the image of an object viewed in a plane mirror, The image is the same distance from the mirror but on the other side of the mirror as the original object.

When light beams from an object reflect off a mirror, they intersect with the picture of that thing, called an image. Real and virtual images are the two sorts of images.

The following parameters can be used to describe an image:

1. It is possible for an image to be real or virtual.

2. Left-right reversal is possible or not.

3. The image can be inverted or upright.

4. The image can be enlarged, shrunk, or made the same size as the object.

Plane mirrors provide virtual images that are upright, inverted left-right, the same distance from the mirror as the item, and the same size as the thing.

As a result, the best description of image production by a plane mirror is “a virtual picture is produced behind the mirror.”

The statement D best describes the position of the image of an object viewed in a plane mirror, The image is the same distance from the mirror but on the other side of the mirror as the original object.

Hence, option D is correct.

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Answer:

Continental polar.

Explanation:

it should be a continental polar air mass because, it is cold.

Answer:

1m/s

Explanation:

wave velocity=frequency × wave length

=0.05 × 20

=1 m/s

Answer:

1. 2 m/s/s

Explanation:

Formula

Force = Mass x Acceleration

Examples of digital signals are Computers, Digital Phones, Digital pens, etc.

Signal is defined as an electromagnetic wave that carries information through a medium. In this, the data is converted into electromagnetic signal which may be analog or digital and then sent from sender to receiver.

Signal which are discrete are known as digital signals.

Examples of digital signals are Computers, Digital Phones, Digital pens, etc.

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Answer:

Examples of digital signals are Computers, Digital Phones, Digital pens, etc.

A digital signal is a signal that represents data as a sequence of discrete values. A digital signal can only take on one value from a finite set of possible values at a given time. With digital signals, the physical quantity representing the information can be many things: Variable electric current or voltage.

Answer:weight is a vector.

Explanation: It is measured in Newtons (N) and has direction

Answer:

total gravity of mass on earth. it can measured by Newton

Explanation:

I think it will help you. follow me ok .

Answer:

G M m / R^2 = m v^2 / R     centripetal force = force of attraction

R = G M / v^2         radius of satellite orbit

R = 6.67E-11 * 5.98E24 / 5000^2

R = 6.67 * 5.98 / 25 * 10^7 m = 1.60 * 107 m = 16 * 10^6 m

Radius of earth = 6.37 * 10^6 m

H = R - r = (16 - 6.4) * 10^6 m = 9.6 * 10^6 m

As the box begins to oscillate, it will have minimum velocity at maximum displacement and maximum velocity at minimum displacement.

The force applied to box will cause a displacement of the box from equilibrium position to maximum position which increases as the applied force increases.

Therefore, as the box begins to oscillate, it will have minimum velocity at maximum displacement and maximum velocity at minimum displacement.

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Answer:

"Both students are correct. When light is traveling through small openings, solids, liquids, gases, or a vacuum, it behaves like a wave. When it interacts with matter, it acts like a stream of particles."

Explanation:

just got it right

Given that the object is moving due north at 32 m/s, this simply expresses the velocity of the object.

This is a quantity that has magnitude but no direction. Examples include energy, work, speed, distance etc

This is a quantity which have both magnitude and direction. Example include acceleration, velocity, moment, displacement etc

Velocity is the rate of change of displacement with time.

Velocity = displacement / time

Velocity can be written as 4 m/s due east

This the distance travelled per unit time.

Speed = distance / time

Speed can be written as 4 m/s

Considering the question given above, we were told that the object is moving due north. This simply talks about the velocity.

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Answer:

Speed is a "scalar" quantity

(C) is the correct answer

An object could travel at 10 m/s to some point and then return to the origin at 10 m/s for an average speed of 10 m/s, however it's displacement over that time would be zero for a net velocity of zero.

Answer:

Reflection involves a change in direction of waves when they bounce off a barrier. Refraction of waves involves a change in the direction of waves as they pass from one medium to another.

Explanation:

F = 1520N

explanation:

by newton third law of motion every action has equal and opposite reaction so truck exert on it so F = 1520N

that's my answer

Answer:

Instruction, admonition, nurture 

Explanation:

The type of artificial intelligence used in the area of military operations is deep learning artificial intelligience.

The term artificial intelligence has to do with the simulation of the decision making ability of the brain in machines.

This has also been experimented in the area of military operations. This type of artificial intelligence is called deep learning artificial intelligience.

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Answer:

F ΔT = Δ(M V)

Change in momentum is equal to applied force* time

Δ(M V) = 6 kg * 12 m / s = 72 kg-m / s

ΔT = 72 kg-m/s / 18 kg-m/s^2 = 6 s     after 6 sec it will tend to rebound

The ticker tape is pulled through the timer once it's powered, which creates a dot along the length of this paper tape at fixed time intervals.

A ticker timer can be defined as a scientific apparatus that is designed and developed to measure time in seconds. Thus, a ticker timer can be used to measure short intervals of time by making dots on a paper tape at regular (fixed) intervals.

By design, a ticker timer comprises a magnet, carbon paper disk and a ticker tape which is pulled through the timer once it's powered, so as to create a dot along the length of this paper tape at fixed time intervals.

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The conditions needed for an ideal pendulum are;

An ideal pendulum is a type of pendulum that satisfies the following conditions,

Thus, the correct statements are second, third and the fourth.

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Answer:

b, c and d are correct ;)

Explanation:

[tex] \sf\huge{\underline{\underline{\overbrace{Answer}}}} [/tex]

The height of the hill is 5m.

Explanation:

⠀

Mass of the car (m) = 800kg

Height of the hill (h) = ?

Gravitational field strength (g) = 10N/kg

Potential energy (P.E.) = 40,000J

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⠀

The height of the hill

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The gravitational potential energy is the energy acquired by the object when the mass of the object is under the gravitational pull of the earth. It is directly proportional to mass and height of the object. If the mass or the height of the object increases the potential energy also increases.

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If we keep a book on the table and if we push the book from the table. This will result in the falling of the book on ground due to gravitational pull of the earth of it's mass and height.

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⠀

While formula to find potential energy is

⠀

[tex] \tt{\Large {P.E. = mg}}h[/tex]

But we need to find 'h'

so the formula for 'h' will be

⠀

[tex] \bold{\Large {h = \frac{P.E. }{mg} }}[/tex]

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⠀

Now substituting the required values.

⠀

[tex] \sf \hookrightarrow h = \frac{40000}{800 \times 10} \\ \\ \\ \sf \hookrightarrow h = \frac{40 \cancel 0 \cancel 0 \cancel 0}{8 \cancel 0 \cancel 0 \times \cancel{10}} \\ \\ \\ \sf \hookrightarrow h = \frac{ \cancel{ 40} \: \:{ \small{5}}}{ \cancel 8} \\ \\ \\ \boxed {\hookrightarrow h = 5m}[/tex]

The field of science that gives us the idea that spacetime is not just a flat grid but is itself a physical entity that can be bent and molded is known as quantum mechanics. Thus, the correct option for this question is C.

Quantum mechanics may be defined as a fundamental theory in physics that significantly provides a detailed description of the physical properties of nature at the scale of atoms and subatomic particles. It is basically the branch of physics that deals with the behavior of matter and light on a subatomic and atomic level.

Time dilation in the theory of special relativity is the “slowing down” of a clock as determined by an observer who is in relative motion with respect to that clock.

General relativity is the theory of gravity. The basic idea is that instead of being an invisible force that attracts objects to one another, gravity is a curving or warping of space. The more massive an object, the more it warps the space around it.

Therefore, quantum mechanics is the field of science that gives us the idea that spacetime is not just a flat grid but is itself a physical entity that can be bent and molded. Thus, the correct option for this question is C.

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Answer:

Explanation:

1. If we increase the distance to twice it's original value, the light intensity is reduced by one-fourth, the light intensity would be:

I0/4

2. rms magnetic field is inversely proportional to distance, so the new rms magnetic field would be:

B0/2

3. average energy density is inversely proportional to the square of the distance, so the new average energy density is:

E0/4

The Rigel is more warmer and brighter as compared to the sun due to its high temperature.

The Rigel is more warmer and brighter as compared to the sun due to its high temperature and its brightness is about 47,000 times more than that of the Sun. Because of its high temperature, the Rigel is white as compared to the sun.

So we can conclude that the Rigel is more warmer and brighter as compared to the sun due to its high temperature.

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Work is performed while initially lifting books off the floor. The work is due to gravity.