Calculate the power of a crane required to lift 36kg of iron per hour from a mine 200 m deep,
(Take g = 10m/s2 ).

Answer:

1/3

Explanation:

Velocity ratio = distance moved by effort / distance moved by load

Answer:

the result is an increase in energy, this is the so-called CONSTRUCTIVE INTERFERENCE.

resulting energy is zero, this is the so-called DESTRUCTIVE INTERFERENCE

Explanation:

When we have an interference process the optical paths of the two rays are added, when the incident rays arrive in phase the result is an increase in energy, this is the so-called CONSTRUCTIVE INTERFERENCE.

When the rays arrive out of phase a half wavelength the resulting energy is zero, this is the so-called DESTRUCTIVE INTERFERENCE

Answer:

its constructive and destructive

Explanation:

i got it right

Answer:

B.) Transverse can e described as troughs and crest while, longitudinal waves can be described as compression and rarefactions.

Answer:

The force used is 160 N, and the power used is 133 W.

Explanation:

Because the formula for force is Work/Distance, the answer in that case would be 800J/5m, and that would give you an answer of 160 N. For Power, the formula is Work/Time, and for that the expression would be 800/6, and that would give you 133 W as the power used.

Answer:

Explanation:

The computation of the total impedance of the circuit is shown below:

The Total impedance of the circuit is

=

where

X_L^2 = 2πfL

= (2π) (60Hz) (0.093 H)

= 35.06 Omega

Now put the value of X_L^2 in the above formula

=

Answer:A

Explanation:

Answer: A)The speed of light in a vacuum is constant, and nothing is faster than the speed of light.

Explanation:

Answered Correctly on Edg.

Answer:

18.03 N

Explanation:

From the fiqure below,

Using parallelogram law of vector

R² = 15²+5²-2×5×15cos(180-60)

R² = 225+25-150cos120°

R² = 250-150(-0.5)

R² = 250+75

R² = 325

R = √325

R = 18.03 N

Hence the resultant force of the object is 18.03 N

Answer:

D

Explanation:

I don't know how to explain but D is just weirdly wrong to me.

Answer:

75 J

Explanation:

After collapsing from the shelf. The ball falls one fourth of the distance down. If we calculate 100 - 1/4 ×100= 75 J.

Answer:

H = 8.45 m

Explanation:

Given that,

Angle of projection, [tex]\theta=37^{\circ}[/tex]

The initial velocity of the ball, u = 20 m/s

We need to find the maximum height reached by the ball. The formula for the maximum height is given by :

[tex]H=\dfrac{u^2\sin^2\theta}{2g}\\\\H=\dfrac{(20)^2\times \sin^2(37)}{2\times 9.8}\\\\H=8.45\ m[/tex]

So, the maximum height reached by the ball is 8.45 m.

Answer:

50000

Explanation:

f= speed of light (c) which is a constant number 3×10^6 divided by wavelength

f = 3×10^6/ 60

f = 50000

Answer:

its D

Explanation:

It is time when the moon completely covers the sun. So, the diagram that shows the earth moon and sun system arranged to cause a full solar eclipse is in option D.

A solar eclipse happens when the Moon moves in front of the Sun, blocking the Sun's light entirely or partially from a tiny portion of the Earth.

During the new moon phase of the eclipse season, when the Moon's circular plane is close to the Earth's orbital plane, such an alignment takes place around every six months.  

A total eclipse occurs when the Moon completely blocks out the Sun's disk. Only a portion of the Moon is covered by annular and partial eclipses.

In contrast to a total eclipse, which can be seen from any place on Earth's night side, a partial eclipse is only viewable from a fairly tiny portion of the globe.

Therefore, it concludes that option D in the figure shows the cause of the total solar eclipse.

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Answer:

Those objects are called transparent objects...

Explanation:

If only some light can pass through them ,it is called translucent....

If no light can pass through them ,it is called opaque.

Answer:

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hey i am not good player but i wanted to give a triel to play duo in ff

Answer:

changing nuclear energy to radiant energy

Changing nuclear energy to radiant energy is an example of transforming potential energy into kinetic energy.

Kinetic energy is a type of motion energy (i.e., energy in movement), which is used to perform work.

In conclusion, changing nuclear energy to radiant energy is an example of transforming potential energy into kinetic energy.

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Answer:

1.454 m

Explanation:

From the question,

L₂ = L₁+α(T₂-T₁).................. Equation 1

Where L₂ = Final Length, L₁ = Initial Length, α = Coefficient of Linear expansion, T₁ = Initial Temperature, T₂ = final Temperature.

Given: L₁ = 1.5 m, α = 23×10⁻⁶ K⁻¹, T₁ = 200 °C, T₂ = -1800 °C

Substitute these values into equation 1

L₂ = 1.5+[23×10⁻⁶ ×( -1800-200)

L₂ = 1.5+(23×10⁻⁶×2000)

L₂ = 1.5+(-0.046)

L₂ = 1.5-0.046

L₂= 1.454 m.

Answer:

1. answer - it is conserved in a system

2. answe- impulse is equal to the change in momentum

Answer:

G.P.E = 368.3

Explanation:

Given the following data;

Mass = 2.63kg

Height, h = 14.29m

We know that acceleration due to gravity is equal to 9.8m/s²

To find the gravitational potential energy;

Gravitational potential energy (GPE) is an energy possessed by an object or body due to its position above the earth.

Mathematically, gravitational potential energy is given by the formula;

[tex] G.P.E = mgh[/tex]

Where;

G.P.E represents potential energy measured in Joules.

m represents the mass of an object.

g represents acceleration due to gravity measured in meters per seconds square.

h represents the height measured in meters.

[tex] G.P.E = 2.63*9.8*14.29 [/tex]

G.P.E = 368.3

Note: the unit of gravitational potential energy is Joules.

Answer: 22

Explanation:

Answer:

The best-known power of the Supreme Court is judicial review, or the ability of the Court to declare a Legislative or Executive act in violation of the Constitution, is not found within the text of the Constitution itself. The Court established this doctrine in the case of Marbury v. Madison (1803).

Answer:

ok

Explanation:

the correct answer is C please follow me

Answer:

a word opposite in meaning to another ( bad and good ).

Explanation:

a word which has opposite in meaning to another word

Answer:

b

Explanation:

liquid and solid

hope that helps :)

b

Explanation:

option b would be the answer

Answer: 1 m/s/s

Explanation: One Newton is defined as the amount of force required to give a 1-kg mass an acceleration of 1 m/s/s.

Explanation:

that's impossible,the radius of the earth can't decrease when the mass doubles!

Answer:

I would say temperature

Answer:

Greater

Explanation:

The longer the handle the greater the mechanical advantage and the greater the increase in force that is applied to the bolt.

Mechanical advantage can be said to be the rate at which a particular force is multiplied.

This then means that there is a comparison between the output force and that of the input force.

The longer the handle gets, the more the mechanical advantage of the bolt and this also translates to it requiring lesser force being applied on it..

Answer:

-2.6

Explanation:

it’s for Acellus

The charge with magnitude and sign is -2.6 x 10⁻⁷ C.

The field developed when a charge is moved. In this field, a charge experiences an electrostatic force of attraction or repulsion depending on the nature of charge.

Given, the electric field 1.22 m from charge is 1570 N/C, pointing

toward the charge.

The electric field and charge is related as

E = kq/r²

q = Er²/k

where k = 9 x 10⁹ N.m²/C²

Substitute the given values in the question, we have

q = 1570 x (1.22)² / 9 x 10⁹

q= 2.6 x 10⁻⁷ C.

Thus, the magnitude and sign  of charge is -2.6 x 10⁻⁷ C.

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