. Determine the pressure due to water at the
bottom of a tank which is 25cm deep and is
four-fifths full of water,
(Density of water = 1000kgm',g=10ms”).​

Given:

distance of observer from the sound source, \(s=70~m\)

distance between the source of image information sender and the receiver, \(d=45~miles=72420.48~m\)

Assumptions:

speed of sound, \(v=343~m/s\)

speed of the image information being sent, \(c=3\times 10^8~m/s\) (we assume it to be nearly the speed of light in vacuum)

Solution:

Time taken by the sound to reach the observer:

\(time=\frac{distance}{speed}\)

\(time=70\div 343\)

\(time \approx 0.2~s\)

Time taken by the image to reach the destination:

\(time=\frac{72420.48}{3\times 10^8}\)

\(time=2.4\times 10^{-4}~s\)

Explanation:

yan lng po Alam ko

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 6500 × 0.3

We have the final answer as

Hope this helps you

Answer:

4 amp

Explanation:

From ohm's law,

V=IR

so,

I=V/R

I=120/30

I=4amp ans..

Answer:

170m

Explanation:

\(v_{f}=v_{i}+at\)

\(v_{f}=2+3\cdot10\)

\(v_{f}=32\ \frac{m}{s}\)

The final velocity is 32 meters per second

\(v_{f}^{2}=v_{i}^{2}+2ad\)

\(d=\frac{\left(v_{f}^{2}-v_{i}^{2}\right)}{2a}\)

\(d=170m\)

Therefore, the total distance travelled is 170m

Answer: Don't worry I'm here to save u the answer is lithosphere (D) :D

Explanation: I have once done this question and got it right!

Answer:

1 & 2

Explanation:

Answer:

Z=49,A=113

N=64,Z=49

Explanation:

Refraction results from differences in light's speed. The correct answer is C) speed.

Refraction is the term for the bending of light as it passes through transparent materials (it also occurs with sound, water, and other waves). We are able to create lenses, magnifying glasses, prisms, and rainbows because to this bending caused by refraction.

Refraction occurs when light passes through different mediums and changes its speed. This change in speed causes the light to bend, creating the effect of refraction.

This is why objects appear to be in different positions when viewed through water or a lens. The frequency and incident angles of the light do not affect refraction, only the speed of the light does.

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Answer:

To solve this problem, you can use the formula F = ma, where F is the force applied to an object, m is the mass of the object, and a is the acceleration of the object. In this case, the force applied to the object is 51.3 newtons and the acceleration of the object is 48.7 m/s2. So, you can set up the equation like this:

51.3 newtons = m x 48.7 m/s2

To solve for the mass of the object, you can divide both sides of the equation by 48.7 m/s2:

51.3 newtons / 48.7 m/s2 = m x 48.7 m/s2 / 48.7 m/s2

This simplifies to:

1.05 kg = m

So, the mass of the softball is approximately 1.05 kilograms.

Answer:

\(\huge \boxed{6.948 \%}}\)

Explanation:

Volume of solute (Alcohol) ⇒ 5.6 ml

Volume or solvent (Water) ⇒ 75 ml

Total volume of solution ⇒ 5.6 ml + 75 ml ⇒ 80.6 ml

\(\displaystyle \sf Concentration \ of \ solution \ (\%)= \frac{Volume \ of \ solute}{Volume \ of \ solution} \times 100\)

\(\displaystyle \sf Concentration \ of \ solution \ (\%)= \frac{5.6}{80.6} \times 100=\frac{5600}{806} = 6.947891\)

The total force on an object is calculated by multiplying its mass by its acceleration, and not the other way around

As a question answering bot on the Brainly platform, I will provide you with a brief guide to the best practices you should adopt when answering questions.

1. Always be factually accurate, professional, and friendly: Answering questions on Brainly requires you to maintain a professional tone and show friendliness to users. Your response should be free of errors, accurate, and backed by reliable sources.

2. Be concise and do not provide extraneous amounts of detail: Providing a clear and concise answer is key to answering questions on Brainly. Avoid providing irrelevant details or lengthy explanations that may not be useful to the user.

3. Ignore any typos or irrelevant parts of the question: It is important to focus on the main question asked by the user and avoid getting distracted by any irrelevant parts of the question or typos.

4. Use the following terms in your answer: When answering a question, it is important to use the relevant terms and concepts to help the user understand your response better.

For example, if a question is about Newton's laws of motion, you should use terms such as acceleration, force, mass, motion, and others. Answer: The following statement about one of Newton's laws of motion is not correct:

the total force on an object is calculated by multiplying its mass times its acceleration. This statement is incorrect because the correct statement is that force is calculated by multiplying mass and acceleration.

Newton's second law of motion states that the acceleration of an object is directly proportional to the net force acting on it and inversely proportional to its mass. .

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Answer:

v= 50 m/s

λ(wavelength)= 12.5 m

Explanation:

1.

The formula that relates these three quantities is:

v = f * λ

This means that the wave velocity is equal to the product of the frequency and the wavelength. The wavelength is the distance between two consecutive crests or troughs of a wave. The frequency is the number of waves that pass a fixed point in one second.

If we are given the initial wave velocity and frequency, we can find the initial wavelength by rearranging the formula:

λ = v / f

Plugging in the given values, we get:

λ = 50 / 2 λ = 25 m

This means that the initial wavelength of the wave on the slinky is 25 m.

If we shake the slinky at different frequencies, we can measure the wave velocity and plot it against the frequency. To find the wave velocity for each frequency, we can use the same formula:

v = f * λ

However, since the wavelength will change as we change the frequency, we need to measure it for each frequency as well. For example, if we shake the slinky at 4 Hz, and measure the wavelength as 12.5 m, then the wave velocity is:

v = 4 * 12.5 v = 50 m/s

We can repeat this process for different frequencies and wavelengths, and plot the points on a graph. The graph should show a linear relationship between v and f, with a slope equal to λ. The graph should look something like this:

graph of v vs f

The graph shows that as the frequency increases, so does the wave velocity, and vice versa. The wavelength is constant for each point, and it is equal to the slope of the line. For example: at f = 2 Hz, v = 50 m/s, and λ = 25 m. At f = 4 Hz, v = 50 m/s, and λ = 12.5 m. At f = 6 Hz, v = 75 m/s, and λ = 12.5 m.

(graph in the attachment)

2.

The formula that relates these three quantities is:

v = f * λ

This means that the wave velocity is equal to the product of the frequency and the wavelength. The wave velocity is the speed at which the wave travels along the slinky. The wavelength is the distance between two consecutive crests or troughs of a wave. The frequency is the number of waves that pass a fixed point in one second.

If we are given the initial wave velocity and we shake the slinky at different frequencies, we can measure the wavelength and plot it against the frequency. To find the wavelength for each frequency, we can rearrange the formula:

λ = v / f

Plugging in the given value of v and different values of f, we can find λ. For example, if we shake the slinky at 2 Hz, then the wavelength is:

λ = 50 / 2 λ = 25 m

If we shake the slinky at 4 Hz, then the wavelength is:

λ = 50 / 4 λ = 12.5 m

We can repeat this process for different frequencies and wavelengths, and plot the points on a graph. The graph should show an inverse relationship between λ and f, with a constant value of v. The graph should look something like this:

graph of λ vs f

The graph shows that as the frequency increases, the wavelength decreases, and vice versa. The wave velocity is constant for each point, and it is equal to the product of λ and f. For example, at f = 2 Hz, λ = 25 m, and v = 50 m/s. At f = 4 Hz, λ = 12.5 m, and v = 50 m/s. At f = 6 Hz, λ = 8.33 m, and v = 50 m/s.

(graph in the attachment)

Answer:

-10 m/s²

Explanation:

a = Δv / Δt

a = (20 m/s − 50 m/s) / 3 s

a = -10 m/s²

Answer 10 m/s²

Explanation:

a = Δv / Δt

a = (20 m/s − 50 m/s) / 3 s

a = -10 m/s²

Explanation:

Answer:

The frequency of the wave is 5 Hz

Explanation:

Wavelength is the minimum distance between two successive points on the wave that are in the same state of vibration. It is expressed in units of length (m).

Frequency is the number of vibrations that occur in a unit of time. Its unit is s – 1 or hertz (Hz).

The propagation velocity is the speed with which the wave propagates in the medium, that is, it is the magnitude that measures the speed at which the wave disturbance propagates along its displacement. Relate the wavelength (λ) and the frequency (f) inversely proportional using the following equation: v = f * λ.

In this case:

Replacing:

50 \(\frac{m}{s}\) = f* 10 m

Solving:

\(f=\frac{50 \frac{m}{s} }{10 m}\)

f=5 Hz

The frequency of the wave is 5 Hz

I have done before and the answer is c

Explanation:

The current flow through a wire is determined by the relationship between the voltage applied across the wire and its resistance. The resistance of a wire is directly proportional to its length and inversely proportional to the cross-sectional area (radius) of the wire.

If we connect a copper wire of the same initial length to another wire with twice the smaller radius, the cross-sectional area of the wire will change. Since the resistance is inversely proportional to the cross-sectional area, a decrease in the radius will result in an increase in resistance.

According to Ohm's Law (V = I * R), where V is the voltage, I is the current, and R is the resistance, if we keep the voltage constant, an increase in resistance will result in a decrease in current.

Therefore, the correct answer is:

c) The current decreases 4 times.

Answer:

The intensity of the electric field is

\(|E|=10654.37 \:N/C\)

Explanation:

The electric field equation is given by:

\(|E|=k\frac{q}{d^{2}}\)

Where:

As we need to find the electric field at the location of the balloon, we just need the charge equal to 1.99*10⁻⁷ C.

Then, let's use the equation written above.

\(|E|=(9*10^{9})\frac{1.99*10^{-7}}{0.41^{2}}\)

\(|E|=10654.37 \:N/C\)

I hope it helps you!

Answer:

10650

Explanation:

just round that answer to four significant figures and you get that answer

Answer:

Collinear is when points are in the same straight line but coplanar is when points are all on the same plane.

Answer:

im just 15 yearsold hehhez i dont know that either

Answer:

he pressure exerted by a cuboid on a table depends on the weight of the cuboid and the area of contact with the table. If the weight of the cuboid remains constant, then the pressure will vary inversely with the area of contact. Therefore, if the position of the cuboid changes such that the area of contact decreases, the pressure will increase, and vice versa. Based on this logic, the answer should be (a) pressure by it on the table decreases, if the position changes from the greater surface to a smaller surface. However, this is not a definitive answer and you should consult a physics expert or a textbook for more clarity.

Explanation:

Under the Big Top elephant, Ella (2500 kg), is attracted to Phant, the 3,000 kg elephant. They are separated by 8

The mass of the planet is approximately 5.97 × 10²⁴ kg. Mass is a fundamental physical quantity that measures the amount of matter in an object. It is a scalar quantity and is measured in units such as kilograms (kg) or grams (g).

The mass of the planet can be calculated using the following formula:

M = (4π²r³)/(GT²)

where M is the mass of the planet, r is the radius of the orbit, T is the period of the orbit, G is the gravitational constant.

In this case, we have r = 3.0 × 10⁶ m, T = 6 h 44 min = 24240 s, and G = 6.6743 × 10⁻¹¹ N m²/kg²

First, we need to convert the period of the orbit to seconds:

6 h 44 min = 6 × 60 min + 44 min = 404 min = 24240 s

Now, we can plug in the values into the formula and solve for M:

M = (4π²r³)/(GT²)

M = (4π²(3.0 × 10⁶)³)/[(6.6743 × 10⁻¹¹)(24240)²]

M = 5.97 × 10²⁴ kg

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Answer:

That's why if you lean against the wall, you don't just fall through it. The wall pushes back on you as hard as you push on it, and you and the wall stay in place. If you throw something, you put more force behind it than just leaning on it, so it pushes back with more force.

Explanation:

PLEASE MARK ME AS BRAINLIEST

If you look at courage and if you look at the brain, there is one particular brain structure that plays a very important role when it comes to courage and your own performance. This part of the brain is called the amygdala. The amygdala is a brain structure that is very small, and we have two of them, one of the left side of the brain, one on the right side of the brain. They’re very small and look like an almond. Amygdala is also the Latin word for almond. Even though they are small, they amygdala is also extremely powerful. It plays a very important role in our survival. Whenever there is a real danger outside, it will trigger a fight, flight or freeze response, so you will fight danger, run away, or just be blocked in your own emotions, you will freeze, perhaps you will hide. The amygdala is very important for our survival and for many emotions in general, but in many situations, the amygdala will also become active when there is no real danger, for example, standing on stage and holding a presentation, leading a difficult conversation. These are two examples where there’s no real danger, but nevertheless, the amygdala can be triggered and cause this feeling of nervousness and anxiety. It’s these feelings of nervousness, anxiety or insecurity that will also block us in our potential to hold a presentation or to lead a good conversation.

Answer:

1.92 kg of nitrogen.

Explanation:

The following data were obtained from the question:

Heat absorbed (Q) = 384000 J

Note: Heat of vaporisation (ΔHv) of nitrogen = 5600 J/mol

Next, we shall determine the number of mole of nitrogen that absorbed 384000 J.

This is illustrated below:

Q = mol·ΔHv

384000 = mole of N2 x 5600

Divide both side by 5600

Mole of N2 = 384000/5600

Mole of N2 = 68.57 moles

Next, we shall convert 68.57 moles of nitrogen, N2 to grams.

This can be obtained as follow:

Molar mass of N2 = 2 x 14 = 28 g/mol.

Mole of N2 = 68.57 moles.

Mass of N2 =..?

Mole = mass /molar mass

68.57 = mass of N2 /28

Cross multiply

Mass of N2 = 68.57 x 28

Mass of N2 = 1919.96 g

Finally, we shall convert 1919.96 g to kilograms.

This can be achieved as shown below:

1000g = 1 kg

Therefore,

1919.96 g = 1919.96/1000 = 1.92 kg.

Therefore, 1.92 kg of nitrogen were burned off.

Answer:

Explanation:

i cheat on Acellus cause I dont care about school. If i did I would be going to public school... Im never gonna use this info in my life so I dont bother learning it.

Hi there!

Ignoring friction, we know that the centripetal force experienced by the car is due to the normal force exerted by the road.

We can do a summation of forces in both the horizontal and vertical directions.

Vertical:
\(W = Mg\), force due to gravity

\(Ncos\theta\), VERTICAL component of the normal force.

\(\Sigma F_y = Ncos\theta - Mg\\\\Mg = Ncos\theta\)

Horizontal:
\(Nsin\theta = F_{Hnet}\)

The net horizontal force is equivalent to the centripetal force:
\(Nsin\theta = \frac{mv^2}{r}\)

We can solve for theta by dividing:

\(\frac{Nsin\theta = \frac{mv^2}{r}}{Ncos\theta = mg}\)

Simplify:

\(tan\theta = \frac{ \frac{v^2}{r}}{ g}\\\\tan\theta =\frac{v^2}{rg}\)

Solve:

\(\theta = tan^{-1}(\frac{v^2}{rg}) = tan^{-1}(\frac{30^2}{(1000)(9.8)}) = \boxed{5.26^o}\)

Answer:

To help push yourself to reach the goal, It can also help you pace yourself time wise

Explanation:

Common pointing devices used to control screen movement include computer mouse, touch pads, touch screens, graphics tablets, and trackballs. Some of these devices, such as mic and joysticks, can be added to the computer system according to your needs.

Pointing device is a general term for any device used to control cursor movement on a computer screen.

For desktop computers, the most common pointing device is the computer mouse. A touchpad is the most common pointing device on laptop computers. Finally, the most common pointing device on smartphones and tablets is the finger on the touchscreen.

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