Can someone please answer this, ill give you brainliest Would be very appreciated.

The frequency of the ultraviolet light given that its wavelength is 100 nm is 3×10¹⁵ Hz

The frequency of the light can obtain as illustrated below:

v = λf

3×10⁸ = 100×10¯⁹ × f

Divide both side by 100×10¯⁹

f = 3×10⁸ / 100×10¯⁹

f = 3×10¹⁵ Hz

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Answer:

Diagram B because a plate resting on a table has gravity acting on it and normal/air resistance force working against the gravity with the same amount of force. Forces that are balanced don't move.

Explanation:

I hope this helps

Diagram B represents the forces acting on the plate that is at rest on the kitchen table.

Every day, we experience the normal force.

In this instance, when we lay a plate on a kitchen table, the normal response force prevents the plate from going through the table, even if gravity is pulling the plate downward. That implies that there is a force acting to push it upward. The word "normal force" refers to the force. Normal in this context refers to being perpendicular to the ground.

Hence, in diagram B, downwards arrow represents gravitational force acting on the plate for its weight and upwards arrow represents normal force acting on the plate by the table.

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Answer:

an instrument for measuring the density of liquids.

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:

[tex] \: [/tex]

Explanation:

Before converting , Let's recall this :

[tex] \: [/tex]

Now, Let's Convert it :

[tex] \\ \longrightarrow \qquad \sf \: 54km / hr \\ [/tex]

[tex]\\ \longrightarrow \qquad \sf \: \frac{54 \times 1km}{1hr} \\ [/tex]

[tex]\\ \longrightarrow \qquad \sf \: \frac{54 \times 1000m}{3600s} \\ [/tex]

[tex]\\ \longrightarrow \qquad \sf \: \frac{54000 m}{3600s} \\ [/tex]

[tex]\\ \longrightarrow \qquad \sf \: \frac{540\cancel{0 }\cancel{0} m}{36 \cancel{0 }\cancel{0}s} \\ [/tex]

[tex]\\ \longrightarrow \qquad \sf \: \frac{540 m}{36s} \\ [/tex]

[tex] \\ \longrightarrow \qquad \frak{\pmb{ 15m /s}} \\ [/tex]

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:

1. 2 m/s/s

Explanation:

Formula

Force = Mass x Acceleration

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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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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Water can rise from the roots to the tops of trees due to capillary action. The correct option is A.

It is the phenomenon by which the liquid rises or falls in a very small diameter tube.

In plants. its roots have very thin diameter tubes which are not visible to the eye. But the water reached to the plants through these tube to every single part of the plant i.e. from root to the fruits.

So, water can rise from the roots to the tops of trees due to capillary action.

Thus, the correct option is A.

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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:

Continental polar.

Explanation:

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

An electromagnetic AM-band radio wave could have a wavelength of  186.6 meters.

Wavelength is the distance between two consecutive points on a wave that are in phase, meaning they are at the same position in their respective cycles. It is usually denoted by the Greek letter lambda (λ) and is measured in units of length, such as meters, centimeters, or nanometers.

The relationship between wavelength, frequency, and speed of a wave is given by the formula:

wavelength = speed / frequency

where "speed" refers to the speed of the wave through a medium, and "frequency" refers to the number of cycles per second.

The AM radio band frequency ranges from 535 kHz to 1605 kHz. To find the wavelength of the AM radio wave, we can use the formula:

wavelength = speed of light / frequency

where the speed of light is approximately 299,792,458 meters per second.

Let's take the highest frequency in the AM radio band, which is 1605 kHz. We need to convert this frequency to Hertz (Hz) by multiplying it by 1000 since kHz is 10^3 times larger than Hz.

1605 kHz = 1605 x 1000 Hz = 1,605,000 Hz

Now, we can calculate the wavelength of the AM radio wave using the formula:

wavelength = 299,792,458 / 1,605,000

wavelength ≈ 186.6 meters

Therefore, an electromagnetic AM-band radio wave could have a wavelength of approximately 186.6 meters.

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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

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

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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Answer: neutrinos

Explanation:

Answer:

Instruction, admonition, nurture 

Explanation:

Answer:

See below ~

Explanation:

A decrease in the ice caps causes a(n) increase in the absorption of sunlight. This cause the global temperature to rise causing more ice caps to melt. As more ice caps melt, the temperature rises. This is an example of a negative feedback loop.

A decrease in the ice caps causes a(n) increase in the absorption of sunlight. This causes the global temperature to rise causing more ice caps to melt. As more ice caps melt, the temperature rises. This is an example of a negative feedback loop.

The options are followed by

Answer:

To be better at something

Explanation:

I have Accelerated at cooking

Answer:

Acceleration means to speed up

Explanation:

Answer:

mars and jupiterrr

Explanation:

ty for all ur help love u

Explanation:

GIVEN :

Work done(W) = 40 J

Time(t) = 4 s

Power (P) = ?

We know that:

W = P×t

Therefore,

P= W/t

=40/4

= 10 W

Hope it helps

Answer:

A

Explanation:

208+4=212

84+2=86

The correct answer is A

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:

(a)The required speed for take off will be 24.49 m/sec.

(b)The minimum length must the runway have 193 m.

Speed is defined as the rate of change of the distance or the height attained. it is a time-based quantity. it is denoted by u for the initial speed while v for the final speed. its SI unit is m/sec.

(a)The required speed for take off will be 24.49 m/sec.

From the Newtons third equation of motion;

[tex]\rm v^2 = u^2+2as \\\\ v=0+2 \times 2 \times 150 \\\\ v=\sqrt{600}\\\\ v=24.49 \ m/sec[/tex]

Hence, the required speed for take off will be 24.49 m/sec.

(b)The minimum length must the runway have 193 m.

From the Newtons third equation of motion;

[tex]\rm v^2 = u^2+2as \\\\ (27.78)^2 = 0+2\times 2 s \\\\\ s=192.93 \ m[/tex]

Hence, the minimum length must the runway have 193 m.

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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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