Physics Question Work & Energy

Answer:

I think its the electromagnetic spectrum

Answer:

Conduction

Explanation:

Conduction is when heat or electricity is transmitted throughout a substance.

The energy transfer taking place through our body is called conduction. Our body is conductive and which make the electrical shock.

There are three different modes of energy transfer namely, conduction, convection and radiation. Conduction is the energy transfer mode on solids and convection is taking place in gases and liquids.

Radiation is the energy transfer mode through vacuum. In conduction the energy transfers easily through the chain of  closely packed molecules. Whereas in convection, the molecule which obtained an energy travels across the space and transfers to other molecules.

Our body transfers energy inside through conduction process. Skin is very conductive and the electrons from the wire can be passed through our body that's why we gets electrically shocked.

To find more on conduction, refer here:

https://brainly.com/question/12136944

#SPJ2

Answer:

C

Explanation:

Because an object that is in motion stays in motion unless acted on by an intrivatal force

Visible light waves do not diffract as well as radio waves because the wavelength of the light waves are too small.

This is defined as the distance between corresponding points of two consecutive waves.

Light waves have a small wavelength which is why it doesn't diffract as well as radio waves thereby making option C the most appropriate choice.

Read more about Wavelength here https://brainly.com/question/10728818

Answer:

1➡️ this is the method of decomposition

2➡️ H2 and O2

3➡️ b

sorry if I am wrong

Answer:

22.5 hp

Explanation:

The power delivered to an object is given by :

[tex]P=F\times v[/tex]

Where

F is force and v is velocity of the car.

For the same force, power is directly proportional to the velocity.

So,

[tex]\dfrac{P_1}{P_2}=\dfrac{v_1}{v_2}\\\\P_2=\dfrac{P_1v_2}{v_1}\\\\P_2=\dfrac{15\times 30}{20}\\\\P_2=22.5\ hp[/tex]

So, the new power is 22.5 hp.

Explanation:

K.E =1/2 mv^2

=1/2(156789)(45.6)^2

=78,394.5 × 2,079.36

=163,010,387.52 kg m/s

This should be your answer.

Answer:

I think it's A, I'm not sure though

Answer:

0.1m/s²

Explanation:

acceleration =(final velocity - initial velocity)÷time taken

acc=(2-0)÷20

av. acc=0.1m/s²

Answer:

smallest area of the heel is 0.000168  m^2

Explanation:

Recall that pressure is defined as: Force / area. Therefore to reach a pressure of 3,500,000 Pa using a force: m * g = 60 kg * 9,8 m/s^2 = 588 N, one needs:

Area = 588 / 3500000 m^2 = 0.000168  m^2

Answer:

Δλ = 3*10⁻³ m.

Explanation:

       [tex]v = \lambda* f (1)[/tex]

       where v is the speed, λ is the wavelength and f is the frequency.

       [tex]\lambda = \frac{v}{f} (2)[/tex]

        [tex]\lambda_{1} =\frac{v}{f_{1}} = \frac{343m/s}{440(1/s)} = 0.779 m (3)[/tex]

        [tex]\lambda_{2} =\frac{v}{f_{2}} = \frac{343m/s}{442(1/s)} = 0.776 m (4)[/tex]

       [tex]\Delta \lambda = \lambda_{1} - \lambda_{2} = 0.779 m - 0.776m = 3e-3 m (5)[/tex]

       ⇒ Δλ = 3*10⁻³ m.

Explanation:

temperature o temperatura

Answer:

I think the answer is c electrical, and light , sound hewt

Answer:

26500 W/m²

Explanation:

Given that:

The diameter of the dish d = 1.2 m

Assuming the Solar power P capture by the dish = 1300 W

The surface area of the pot is calculated by using the formula:

[tex]= \pi r^2[/tex]

[tex]\pi \dfrac{d^2}{4}[/tex]

where; the diameter = 25 cm

Area = [tex]\pi \dfrac{d^2}{4}[/tex]

Area = [tex]\pi \dfrac{0.25^2}{4}[/tex]

Area = 0.049 m²

The intensity is calculated by using the formula

I = power/area

I = 1300/0.049

I = 26530.6 W/m²

I ≅ 26500 W/m²

Answer:

x = 1162.5 W/m²

Explanation:

Since, the power decrease is proportional to the depth of the beam. Therefore, interpolation can be used to find the intensity of power at a depth of 1.25 m. First we calculate the slope from know points:

[tex]Slope = \frac{\Delta y}{\Delta x} \\\\Slope = \frac{(1500 - 3000)\ W/m^{2}}{(2 - 0)\ m} \\\\Slope = -750\ W/m[/tex]

Now, we can find the unknown value by using this slope:

[tex]Slope = -750\ W/m = \frac{(600 - x)\ W/m^{2}}{(2 - 1.25)\ m}\\\\(-750\ W/m)(0.75\ m) = (600 - x)\ W/m^{2}\\x = 600\ W/m^{2} + 562.5\ W/m^{2}\\[/tex]

x = 1162.5 W/m² (Power intensity at depth of 1.25 m)

Answer:

60V

Explanation: . V = IR = 1

30*2=60

Answer: 9/10

Explanation:

because it's really important and makes you energetic

20 push ups

hope thats correct^^

Answer:

interna

Explanation:

please mark as brainllest

Answer:

In summation, acceleration can be defined as the rate of change of velocity with respect to time and the formula expressing the average velocity of an object can be written as: a =Δ v/ Δt The other 4 equations: d = vit+ (1/2) at2

Explanation:

Answer:

I have no clue I'm really really really really really but like really sorry this is so hard

Answer:

0.011 N-m

Explanation:

Given that

The mass of a solid cylinder, m = 30 kg

The radius of the cylinder, r = 0.18 m

The acceleration of the cylinder, [tex]\alpha =0.023\ rad/s^2[/tex]

It rotates about an axis through its center. We need to find the torque acting on the cylinder. The formula for the torque is given by :

[tex]\tau=I\alpha[/tex]

Where

I is the moment of inertia of the cylinder,

For cylinder,

[tex]I=\dfrac{mr^2}{2}[/tex]

So,

[tex]\tau=\dfrac{mr^2\alpha }{2}\\\\\tau=\dfrac{30\times (0.18)^2\times 0.023 }{2}\\\\\tau=0.011\ N-m[/tex]

So, the required torque on the cylinder is 0.011 N-m.

Answer:

D

Explanation:

Newtons first law states that if an object is at rest it will stay at rest only if an unbalanced force acts on it. As well as if an object is in motion it will stay in motion unless an unbalanced force acts on it.

Ps- The object will stay moving in the same speed and direction.

Answer:

D

Explanation:

I just know

Answer:

Is the vector is(mathematics) a directed quantity, one with both magnitude and direction, the (soplink) between two points while velocity is (physics) a vector quant that denotes the rate of change of position with respect to time or a speed with the directional component.

Answer: that guy

Explanation:

Answer:

he pattern is circular because the leaves have rounded spaces that when added at a great distance give a circular shape in far-field diffraction or Fraunhofer

Explanation:

When the sunlight reaches the trees it suffers a diffraction phenomenon if the leaves are close together,

This diffraction spectrum when we see it near the leaves has the shape of the edge of each leaf this diffraction is of the near field type, when we move away from the leaves the different patterns add up, resulting in a far field diffraction, this diffraction it has a characteristic shape, regardless of the details of the initial shapes.

In general, if the initial shapes are slits, the pattern is of the lines type, but if the pattern has circular or rounded characteristics, the resulting pattern is circles of different sizes depending on the space between the initial openings.

Consequently the pattern is circular because the leaves have rounded spaces that when added at a great distance give a circular shape in far-field diffraction or Fraunhofer

Option 3) a Soccer Ball

will travel the farthest distance.

Answer:

a bowling ball

pls follow me and Mark as brainliest and follow me to get free thanks to all your answers

This question is incomplete, the complete question is;

A positive charge of magnitude Q1 = 6.5 nC is located at the origin.

A negative charge Q2 = -3.5 nC is located on the positive x-axis at x = 16.5 cm from the origin. The point P is located y = 10.5 cm above charge Q2.

Calculate the x-component of the electric field at point P due to charge Q1. Write your answer in units of N/C.

Answer:

the x-component of the electric field at point P due to charge Q1 is 1291.33 N/C    

Explanation:

Given the data in the question;

Q1 = 6.5 nC, Q2 = -3.5 nC

from the image below, to get our angle ∅

tan∅ = opp/adj

tan∅ = 10.5 / 16.5

tan∅ = 0.636363

∅ = tan⁻¹( 0.636363 )

∅ = 32.47°

also, r1 = √( 16.5² + 10.5²)

r1 = √( 272.25 + 110.25 )

r1 = √382.5

r1 = 19.55 cm = 0.1955 m

Now, the x-component of the electric field at point P due to charge Q1 will be;

Ex = E2cos32.47°

= (kQ1/r1²)cos32.47°

we know that;  k is Coulomb's law constant ( 9 × 10⁹ N.m²/ C²

Q1 = 6.5 nC = 6.5 × 10⁻⁹ C

so we substitute

= ((9 × 10⁹ × 6.5 × 10⁻⁹) / (0.1955)²) cos32.47°

= (58.5 / 0.03822025) × 0.843672

= 1291.33 N/C

Therefore, the x-component of the electric field at point P due to charge Q1 is 1291.33 N/C