How do simple machines make it easier to move an object?

Answer:

Food supplies the body with energy and without energy the body cannot work.

Answer:

v = c / n      (n = 1 for air)

v = c / 1.33 = 3 * 10E8 m/s / 1.33 = 2.25 * 10E8 m/s

Answer:

C. Neutrons

Explanation:

Protons +

Electron -

Answer:

True

Explanation:

It is true that the real definition of lenz's law in magnetism is the current is induced in the closed conducting loop in such a direction that the magnetic field induced by this current opposes the change in the flux through the loop.

This means that induced current opposes the very cause that produces it.

Answer:

There are 5 general layers; organism, population, community, ecosystem, and biosphere.

Explanation:

Hope this helps!

Answer:

[tex]T=8\times 10^{-19}\ s[/tex]

Explanation:

Given that,

The frequency of x-ray is, [tex]f=1.25\times 10^{18}\ Hz[/tex]

We need to find the time period of these x-rays. Let it is be T. We know that, the relation between f and T is given by :

T = 1/f

So,

[tex]T=\dfrac{1}{1.25\times 10^{18}}\\\\=8\times 10^{-19}\ s[/tex]

So, the time period of these x-rays is equal to [tex]8\times 10^{-19}\ s[/tex].

The time period of the electromagnetic wave is 8.0 × 10⁻¹⁹ seconds.

Given the data in the question;

Frequency; [tex]f =1.25 * 10^{18}Hz[/tex]

Time period; [tex]T =\ ?[/tex]

Time period is simply the time taken for one complete cycle of vibration to pass a given point.

It is expressed as:

[tex]T = \frac{1}{f}[/tex]

We substitute our value into the equation

[tex]T = \frac{1}{1.25 * 10^{18}Hz} \\\\T = \frac{1}{1.25 * 10^{18}s^{-1}}\\\\T = 8.0 * 10^{-19}s[/tex]

Therefore, the time period of the electromagnetic wave is 8.0 × 10⁻¹⁹ seconds.

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Answer:haha

Explanation:dont know

Answer:

a)[tex]F_{net} =275000N[/tex]

b)[tex]F_{net}'= 386718.75N[/tex]

Explanation:

From the question we are told that:  

Man's Mass [tex]M=75kg[/tex]

Speed of man [tex]V_m=5.5m/s[/tex]

a)

Landing time [tex]t_l=1.5ms[/tex]

Generally the equation for average net force F_{ net}  is mathematically given by

[tex]F_{net} = 75 *5.5 /(0.0015) N[/tex]  

[tex]F_{net} =275000N[/tex]

b)

Landing time [tex]t=0.08s[/tex]

Generally the equation for average net force[tex]F_{ net}[/tex]  is mathematically given by

[tex]F_{net}' = impulse /time \\ F_{net}'= \frac{m * u}{t}[/tex]

[tex]F_{net}'= \frac{75 * 5.5}{0.08}[/tex]

[tex]F_{net}'= 386718.75N[/tex]

It's easier for you to solve these than to try and read my solutions if I solve them.

Use this magic formula:

(period) · (frequency)  =  1

If you handle the magic formula carefully and correctly, you can get these facts out of it:

--  Period =  1 / frequency

-- Frequency =  1 / period

Use the first one to solve #1.

Use the second one to solve #2.

Answer:

https://www.ux1.eiu.edu/~cfadd/1350/Hmwk/Ch08/Ch8.html

Explanation:

Answer:

the answer is B

Answer:

Nothing

Explain

Nothing happenes when you take off your cloths quickly.

Scientificly nothing really happnes.

Answer:

No

Explanation:

Recall that the hierarchy of wavelength color from minimum wavelength to maximum wavelength is:

[tex]V < I < B < G < Y < O < R;[/tex] and

[tex]E \ \alpha \ \dfrac{1}{\lambda}[/tex]

As a result, blue light has a higher energy level than green and red light.

As a result, the surface glows due to the blue LED. The green LED, on the other hand, would not allow the surface to glow as much as the red LED, which has a lower energy level when compared to the green light. As a result, the red LED would not allow the surface to glow as well.

Answer:

0.5 m/s 2 is the acceleration

Explanation:

hope it helped!!!

Answer:

Explanation:

wavespeed = wavelength * frequency

wavespeed / wavelength = frequency

343 / 17 = 20.17 Hz

343 / 0.017 = 201764 Hz

So range of frequencies we can hear is between 20Hz and 20,000 Hz ( or 20.17 to 201764 if you dont round up/down)

Answer:

v = 0.99 c = 2.99 x 10⁸ m/s

Explanation:

From the special theory of relativity:

[tex]t = \frac{t_o}{\sqrt{1-\frac{v^2}{c^2} } }\\[/tex]

where,

v = speed  of travel = ?

c = speed of light = 3 x 10⁸ m/s

t = time measured on earth = 90 years

t₀ = time measured in moving frame = 6 months = 0.5 year

Therefore,

[tex]90\ yr = \frac{0.5\ yr}{\sqrt{1-\frac{v^2}{c^2} } } \\\\\\\sqrt{1-\frac{v^2}{c^2}} = \frac{0.5\ yr}{90\ yr}\\ 1-\frac{v^2}{c^2} = 0.00003086\\\frac{v^2}{c^2} = 1-0.00003086\\[/tex]

v = 0.99 c = 2.99 x 10⁸ m/s

Answer:

a. When the magnetic field is constant, there is only a magnetic field in the region of space. When the magnetic field is time dependent, there will be both a magnetic field and an electric field in the region of space.

Explanation:

This is true because according to Maxwell's equation, a time dependent magnetic field produces an electric field.

When the magnetic field is constant, there is no electric field in that region of space. But, when it begins to vary, an electric field is then generated by Maxwell's equation which is given by

CurlE = -dB/dt

So, there is initially no electric field when the magnetic field is constant, but it exists when the magnetic field becomes time dependent.

So when dB/dt = 0

CurlE = 0 ⇒ E = 0

So when dB/dt ≠ 0

CurlE ≠ 0 ⇒ E ≠ 0

Answer:

The thickness of the oil slick. t = 173.91 nm

Explanation:

Oil film thickness t is given by the equation

[tex]t = \frac{\lambda}{2n}[/tex]

where λ = wavelength of incident light in air = 400 nm

and n = index of refraction of oil

therefore,

[tex]t =\frac{400}{2\times 1.15}\\t= 173.91 nm[/tex]

The thickness of the oil slick. t = 173.91 nm

[tex]\huge{\mathbb{\tt { QUESTION↓}}}[/tex]

In the early solar system,comets that struck earth may have brought in

[tex]\color{green}{\tt{O} \: \: \color{black}{\tt {A.water}}}[/tex]

[tex]\color{green}{\tt{O} \: \: \color{black}{\tt {B.Advanced Life}}}[/tex]

[tex]\color{green}{\tt{O} \: \: \color{black}{\tt {C.Plankton}}}[/tex]

[tex]\color{green}{\tt{O} \: \: \color{black}{\tt {D. All \: of \: the \: above}}}[/tex]

[tex]\huge{\mathbb{\tt { ANSWER↓}}}[/tex]

[tex]\color{red}{\tt {D. \: All \: of \: the \: above}}[/tex]

[tex]\color{black}{\tt {because \: the \: true \: answer \: is \: comet}}[/tex]

[tex]{\boxed{\boxed{\tt{WHAT \: IS \: COMET?}}}}[/tex]

[tex]\color{black}{\tt{A \: comet \: is \: an \: icy, \: small \: Solar \: System \: body}}[/tex]

[tex]\color{black}{\tt { that, \: when \: passing \: clos \: e to}}[/tex]

[tex] \color{black}{\tt {the \: Sun, \: warms \: and \: begins \: to \: release}}[/tex]

[tex]\color{black}{\tt { gases, \: a \: process \: that \: is \: called \: outgassing. }}[/tex]

[tex]\color{black}{\tt{This \: produces \: a \: visible \: atmosphere \: or \: coma,}}[/tex]

[tex]\color{black}{\tt{and \: sometimes \: also \: a \: tail}}[/tex]

#CarryOnLearning

#LetsEnjoyTheSummer

Answer:

C) 26.6

Explanation:

I don't know how to calculate vector

The angle between the two vectors is 117⁰

The given parameters;

vector A = 3.00i + 1.00j

vector B = -3.00i + 3.00j

The  angle between the two vectors is calculated as follows;

[tex]cos \ \theta = \frac{A\ . \ B}{|A| \ . \ |B|}[/tex]

The dot product of vector A and B is calculated as;

[tex]A \ . \ B = (3i \ + j) \ . \ (-3i \ + 3j) = (3\times -3) + (1 \times 3) = -9 + 3 =- 6[/tex]

The magnitude of vector A and B is calculated as;

[tex]|A| = \sqrt{3^2 + 1^2} = \sqrt{10} \\\\|B| = \sqrt{(-3)^2 + (3)^2} = \sqrt{18}[/tex]

The  angle between the two vectors is calculated as;

[tex]cos \ \theta = \frac{-6}{\sqrt{10} \ . \sqrt{18} } \\\\cos \ \theta = \frac{-6}{\sqrt{180} } \\\\cos \ \theta = -0.4472\\\\\theta = cos \ ^{-1} (-0.4472) \\\\\theta = 116.6^0 \approx 117^0[/tex]

Thus, the angle between the two vectors is 117⁰

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Answer:

1. sleep well

2. drink water

3. eat healthy

4. less sugar and salt

5. exercise 30 minutes daily

6. eat whole grains

7. eat fruits and vegetables

8. practice mental health

9. stay motivated

10. eat a variety of foods

Answer:

The solution is given below:

Explanation:

The computation of the speed is shown below

As we know that

Speed = distance ÷ time

where

distance is 2000 km

And, the time is 2.5 hours

SO, the speed is

= 2,000 ÷ 2.5

= 800 km/h

Now the distance would be the same i.e. 2,000 km

but the time is 2 hours

So, the speed is

= 2,000 km ÷ 2 hours

= 1,000 km/hr

The direction should be opposite to the first airplane

Answer:

Centre of mass is the point at which the distribution of mass is equal in all directions, and does not depend on gravitational field. Centre of gravity is the point at which the distribution of weight is equal in all directions, and does depend on gravitational field.

Answer:

Centre of mass is the point at which the distribution of mass is equal in all directions, and does not depend on gravitational field.

Centre of gravity is the point at which the distribution of weight is equal in all directions, and does depend on gravitational field.

hope this helps you ☺️☺️

Answer:

how to deal with devoirce

Explanation:

The psychological and physical symptoms that Sarah presents include:

From the information given, we can infer that some of the symptoms include the fact that Sarah frequently has headaches, loss of appetite, and gets angry easily.

The primary psychological disorder diagnosis that fits her symptoms based on the disorders will be depression. She's depressed because she just got divorced. This has taken a toll on her health.

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https://brainly.com/question/19276767

Using ohm's law and the characteristics of series and parallel circuits, we find that the correct answer is B: Voltage on the voltmeter 1.5 V

given parameters

    * The element X has a resistance Rₓ = R

    * Element Y with resistance R_y = R / 2

     * The voltmeter with internal resistance R_v = R

    * Battery voltage V = 6V

    * the circuit is in the diagram

To find

     The Voltmeter reading.

For this exercise we use ohm's law which establishes a linear relationship between voltage and current

      V = i R

Let's solve the circuit in parts:

1 part.  We reduce the part in parallel, finding its equivalent resistance

            R_ {eq1}

The equivalent resistance between Y element and the voltmeter that is in parallel, therefore their equivalent resistance is

         [tex]\frac{1}{R_{eq1} } = \frac{1}{R_y} + \frac{1}{R_v}[/tex]

         [tex]\frac{1}{R_{eq1} }= \frac{1}{\frac{R}{2} } + \frac{1}{R} = \frac{3}{R}[/tex]

         [tex]R_{eq1} = \frac{R}{3}[/tex]

Now element X and this equivalent resistance are in series ( see attached), so the equivalent resistance of the entire circuit is

        R_{eq} = Rₓ + R_{eq1}

we substitute

       R_{eq} = [tex]R + \frac{R}{3} = \frac{4}{3} \ R[/tex]

2 part. We look for the current of the circuit, usin the ohm's Law

        V = i R_{eq}

        i = [tex]\frac{V}{R_{eq} }[/tex]

        i = [tex]\frac{6}{\frac{4R}{3} } = \frac{18}{4R}[/tex]

        i = 4.5 / R

In a series circuit the current is constant and the total voltage is the sum voltage of each element, so the voltage in the parallel R_{eq1}

        V₂ = I R_{eq1}

        V₂ = [tex]\frac{4.5}{R} \ \frac{R}{3}[/tex]4.5 / R R / 3

        V₂ = 1.5 V

3 part. The voltmeter and the Y element  are in parallel, so the voltage in the two elects is the same,  consequently the voltage of the voltmeter (V_v)

          V_v = V₂ = 1.5 V

Using ohm's law and the properties of series and parellel circuits we find the voltage across the voltmeter

           V_v = 1.5 V

To learn about series and parallel circuits here:  brainly.com/question/11409042

Answer:The three main types are reflecting telescopes, refracting telescopes, and catadioptric telescopes. Radio telescopes collect and focus radio waves from distant objects. Space telescopes orbit Earth, collecting wavelengths of light that are normally blocked by the atmosphere.

Answer:

oii me manda mensagem fofo vc tem namorada fofo