help pls asap , i do not get it , I’ll name you the brainliest

Answer:

here

Explanation:

Answer:

493,420 Joules

Explanation:

Potential energy of the roller coaster

PE = mgh

Where

m = mass (kg)

g = gravitation (9.8 m/s²)

h = height

PE = 72 x 700 x 9.8 (in some cases 10)

PE = 493,420 J

If g = 10

PE = 504,000 J

Answer:

34

Explanation:

For the student that walks to the right 25 m in 15 s and then turns and walks to the left 15 m in 8.0 s, we have:

1. The average speed is 1.74 m.

2. The average velocity is 1.42 m.

1. The average speed is an scalar wich is given by:

[tex] V = \frac{d_{t}}{t_{t}} [/tex]

Where:

[tex]d_{t}[/tex]: is the total distance

[tex]t_{t}[/tex]: is the total time

The total distance and the total time can be calculated as follows:

[tex]d_{t} = d_{1} + d_{2} = 25 m + 15 m = 40 m [/tex]

[tex] t_{t} = t_{1} + t_{2} = 15 s + 8.0 s = 23 s [/tex]

Since V is a scalar, the direction of motion is not important to calculate the final value.

Then, the average speed is:

[tex] V = \frac{d_{t}}{t_{t}} =\frac{40 m}{23 s} = 1.74 m/s [/tex]

2. The average velocity is a vector, so the direction of motion is important here. This ΔV can be calculated with the following equation:

[tex] \Delta V = \frac{\Delta x}{\Delta t} = \frac{x_{f} - x_{i}}{t_{f} - t_{i}} [/tex]

Where:

x: is the displacement  

f: is for final and i: is for initial

Hence, the average velocity is:

[tex] \Delta V = \frac{x_{f} - x_{i}}{t_{f} - t_{i}} = \frac{15 m - 25 m}{8.0 s - 15 s} = 1.42 m/s [/tex]

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I hope it helps you!

Answer:

Mark me as brainliest as i need it ..

I will answer your questions

Answer:

[tex] \boxed{d = 120\: meters} [/tex]

Explanation:

Given:

We can use this equation with the variables given to solve:

[tex] d \: = \frac{t \: (v + v_{0})}{2}[/tex] →

[tex] d \: = \frac{(10s) \: ((16.0 \: m/s) + (8.0 \: m/s))}{2} [/tex] →

[tex] d \: = \frac{(10s) \: (24 \: m/s)}{2} [/tex] →

[tex] d \: = \frac{(10 \: s \: • \: 24 \: m/s)}{2} [/tex] →

[tex] d \: = \frac{240 \: m}{2} [/tex] →

[tex] d \: = 120 \: m [/tex]

The distance traveled by the object in 10 seconds is 120 meters.

Given to us,

Final velocity of the object, [tex]v= 16\ meter/sec[/tex]

Initial velocity of the object, [tex]u= 8\ meter/sec[/tex]

Time for traveling, [tex]t= 10\ sec[/tex]

Using the first equation of motion,  we can find out acceleration of the object [tex]a[/tex],

[tex]v=u+at\\16=8+a\times 10\\a= 0.8\ meter/sec^2[/tex]

Now using the second equation of motion and putting the value of [tex]a[/tex],

The distance[tex](S)[/tex] traveled by the object ,

[tex]\begin{aligned}S&= ut+\frac{1}{2}at^2\\&= 8\times 10+ \frac{1}{2}\times 0.8\times 10^2\\&= 120\ meters \\\end{aligned}[/tex]

Hence,The distance traveled by the object in 10 seconds is 120 meters.

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Answer:

[tex]\boxed {\boxed {\sf 40 \ Newtons}}[/tex]

Explanation:

We are asked to find the force of a wheelbarrow. According to Newton's Second Law of Motion, force is the product of mass and acceleration.

[tex]F= \ m \times a[/tex]

The mass of the wheelbarrow is 20 kilograms. We are not given the acceleration, so we must calculate it using the following formula.

[tex]a= \frac{v_f-v_i}{t}[/tex]

The wheelbarrow starts at rest or 0 meters per second (initial velocity) and accelerates to reach 10 meters per second (final velocity) in 5 seconds (time).

Substitute these values into the formula.

[tex]a= \frac{ 10 \ m/s-0 \ m/s}{5 \ s}[/tex]

Solve the numerator.

[tex]a= \frac{10 \ m/s}{5 \ s}[/tex]

Divide.

[tex]a= 2 \ m/s/s[/tex]

[tex]a= 2 \ m/s^2[/tex]

Now we know the mass and acceleration of the wheelbarrow

Substitute the values into the force formula.

[tex]F= 20 \ kg \times 2 \ m/s^2[/tex]

[tex]F= 40 \ kg*m/s^2[/tex]

Convert the units. 1 kilogram meter per square second is equal to 1 Newton, so our answer of 40 kilogram meters per square second is equal to 40 Newtons.

[tex]F= 40 \ N[/tex]

Answer:

40 N

Explanation:

We know that

F = ma

and

a = (v - u)/t

So,

F = m(v - u)/t

F = 20(10 - 0)/5

F = 20(10/5)

F = 20(2)

F = 40 N

Answer:

I hope it was helpful.........

Explanation:

2 h = 120 min

v = 0.1 km/m

distance = v × t

= .1 × 120

= 12 km

Answer:

a joule is the unit of work

Explanation:

Answer:

Explanation:

The magnitude of the current can be found by using the formula

[tex]i = \frac{v}{r} \\ [/tex]

v is the voltage

r is the resistance

From the question we have

[tex]i = \frac{40}{5} = 8 \\ [/tex]

We have the final answer as

Hope this helps you

Answer:

8 A

Explanation:

We know that

V = IR

40 = I(5)

40/5 = I

8 = I

Answer:

Heat capacity is the ratio of the amount of heat energy transferred to an object to the resulting increase in its temperature. Molar heat capacity is a measure of the amount of heat necessary to raise the temperature of one mole of a pure substance by one degree K.

Explanation:

hope this helps <3

Recall that vector addition can be visually represented by the head-to-tail method. This means that the head of one vector is glued to the tail of the other vector, to point us directly to the target vector we're after. Think of it like following instructions on a map.

A visual example is shown below. There are two pathways to arrive at the c = a+b vector. The patheway on the right is a+b while the path on the left is b+a. The order doesn't matter since we arrive at the same destination.

-------------------------------------

Here's an algebraic approach without the need of a drawing.

Consider that vectors a and b are defined like so

a = <p,q>

b = <r,s>

where p,q,r,s are real numbers. They define the coordinates of the two vectors.

Adding vectors a and b gets us

a+b = <p,q>+<r,s> = <p+r,q+s>

We add the corresponding coordinates. Since p+r is the same as r+p, we can say,

b+a = <r,s>+<p,q> = <r+p,s+q> = <p+r,s+q> = a+b

Therefore, a+b = b+a. Again, this all relies on the fact that addition of scalar numbers can be done in any order. So by extension, vector addition can be done in any order. This applies to multiple vectors and not just two of them.

The  big bang theory or great expansion explains the formation of the universe from a point with very high density where matter and space were created, it can be observed in an experiment

The Big Bang theory that can be adapted with some home experiments, specifically the expansion can be measured using an experiment with inflating balloons.

Materials

deflated balloons

marker

thread

measuring tape

Description of the experiment

The stars or galaxies are marked repeatedly with an initial separation and this distance is measured by a thread the length and the thread with a meter, this is used as measured by the fact that the surface is curved.

The balloon is inflated and measurements of the separation are made, observing that as the volume of the balloon increases (time increase) the separation of the galaxies increases

The increase in distance is explained by the Big Bang theory or great expansion.

There is also astronomical evidence:

* The redshift of the hydrogen spectral lines that is explained by the Dopler effect, which is a move away from objects

* Background radiation in the microwave range that comes from everywhere and would be the residue of a large initial explosion.

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We know

[tex]\\ \sf\longmapsto a=\dfrac{dv}{dt}[/tex]

[tex]\\ \sf\longmapsto a=\dfrac{dv}{dx}.\dfrac{dx}{dt}[/tex]

[tex]\\ \sf\longmapsto a=v\dfrac{dv}{dx}[/tex]

[tex]\\ \sf\longmapsto adx=vdv[/tex]

[tex]\\ \sf\longmapsto a{\displaystyle{\int}^x_{x_0}}dx=\displaystyle{\int}_u^v vdv[/tex]

[tex]\\ \sf\longmapsto a(x-x_0)=\dfrac{v^2-u^2}{2}[/tex]

Here

[tex]\\ \sf\longmapsto v^2-u^2=2as[/tex]

Answer:

doctor,health assistant , dentist, psychotherapist , nurse ,etc

Answer:

B. Psycology

Psycology is considered a social science while all the other choices are natural sciences.

Psychology is not considered a natural science. While it deals with the study of the human mind and behavior, psychology is generally classified as a social science rather than a natural science.

Natural science is a branch of science that deals with the study of the natural world, including the physical, chemical, and biological aspects of nature. It is a systematic and empirical approach to understanding the natural phenomena that occur in the universe. Natural sciences include subjects such as physics, chemistry, biology, geology, and astronomy, among others.

These sciences use the scientific method to investigate and explain the behavior of the natural world, relying on observation, experimentation, and analysis of data to formulate theories and laws that can explain natural phenomena. Natural science plays a critical role in our understanding of the universe and has contributed immensely to technological advancements in various fields. Therefore, option (B) is correct.

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#SPJ7

Answer:

490.5

Explanation:

Formula

U = mgh

= 1000 x 9.81 x 0.05m

= 490.5

the nature of a machine having more power can work fast

Answer:

Tax saver: As a government-backed tax-saving scheme, the principal invested in NSC qualifies for tax savings under under Section 80C of the Income Tax Act up to Rs. 1.5 lakhs annually.

Investment Flexibility : You can invest as small as Rs. 100 as an initial investment with no maximum limit.

Answer:false

Explanation:because it means you're pushing yourself too much and you need to use smaller weights

Answer:

F=9/5(°C)+32

Explanation:

Let's take an example

[tex]\\ \sf\longmapsto \dfrac{9}{5}(100)+32[/tex]

[tex]\\ \sf\longmapsto 9(20)+32[/tex]

[tex]\\ \sf\longmapsto 180+32[/tex]

[tex]\\ \sf\longmapsto 212°F[/tex]

Explanation:

The branch is possessing gravitational potential energy.

Answer:

a

Explanation:

i remeber learing this

hope this helps

branliest plzz

Answer:

The answer is C. anti social

Explanation:

Hope that helps!

Answer:

solar wind

Explanation:

the sun's atmosphere is made of hydrogen which itself made subatomic particle. These particle are constantly boiling off the sun and streaming outward at very speed. So, the sun's magnetic field and particles are called solar wind.

Answer:

c

Explanation:

Solar wind

Answer:

Yes, when dealing with electricity as long as there is an input source there is always built up energy waiting to be used also known as kinetic energy. The fan is not spinning but if it were turned on it would spin instantaneously.

Let Mass be m

If its doubled then

[tex]\\ \sf\longmapsto F=2ma[/tex]

Hence force also needs to be doubled.