At what point is the speed at a maximum? .
A. Just before the skater reaches the very bottom
B. At the exact bottom
C. A little bit after reaching the bottom

The mechanical advantage (M.A) of a real

machine is always less than its velocity ratio (V.R.)

because mechanical advantage decreases due to the friction and weight of moving parts of the machine where as the velocity ratio remains constant.

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Answer:

The mass of the iron cube of side 0.0800 m, having a density of 7874 kg/m³ is 50.39 kg.

Mass can be defined as the quantity of matter a body contains

To calculate the mass of the iron cube, we use the formula below.

Formula:

Where:

From the question,

Given:

Substitute these values into equation 1

Hence, The mass of the iron cube is 50.39 kg.

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Answer:

4.03

Explanation:

correct answer for acellus

Option B is correct.

(B )The incident ray is unpolarized whereas the reflected ray is vertically polarized.

Ray is the next in a series of characters. Ray is made up of two elements: a line and a line segment. It has one terminating end and one indefinitely extending end.

The ray's length cannot be determined. A ray is seen in the diagram below.

Reason ;

Many light sources, such as the sun, create polarised waves ( randomly). Unpolarized light is made up of a large number of waves with all conceivable polarisation directions.

Hence option B is correct.

(B )The incident ray is unpolarized whereas the reflected ray is vertically polarized.

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The scientist gets surprised In terms of the masses of the subatomic particles, scientists anticipated the rule of conservation of mass to apply to nuclear fission and it got failed.

The utilization of nuclear reactions to generate energy is known as a nuclear power. Nuclear fission, nuclear decay, and nuclear fusion processes are all sources of nuclear energy.

Nuclear power facilities currently produce the great bulk of the electricity generated by nuclear fission of uranium and plutonium.

In terms of the masses of the subatomic particles, scientists anticipated the rule of conservation of mass to apply to nuclear fission.

An atom's mass is not equal to the sum of the masses of the subatomic particles that make it up in actuality.

The energy that bonds the subatomic particles is the reason behind this. When a link is broken, the mass of the energy of the bonds is lost, resulting in what we now refer to as a mass defect.

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Answer:

I don't know the answer but I can say the answer isn't B, so don't pick B.

Explanation:

I got it wrong on edge test, i picked B but, B is not correct.

[tex]\qquad\qquad \huge \bf༆ Answer ༄[/tex]

➙ The Correct choice is A

⧠ when two glass marbles bounce off each other, they regain their respective position after collision, since the Loss of energy is minimum, it can be considered as an elastic collision.

Answer:

Explanation:

The question asks "What situations..." and to "Select all the correct answers."

In addition to "two marbles bounce off each other", "a bowling ball knocks over five pins" is another correct answer. The collision between ball and pins is elastic because they are both hard.

Answer:

repeat using same variables

Explanation:

have peer repeat using same variables

answer:

click on the picture, hope it helps

The magnitude of the electric field at that location is is 40  N.C⁻¹.

The force per unit charge exerted on a positive test charge that is at rest at a given position is the force per unit charge that is used to define the electric field analytically.

Electric charge or magnetic fields with variable amplitudes can produce an electric field.

Given parameters:

Charge of the positive test charge, q =  5.0x10⁻⁶ C.

Electric force exerted by the electric field, F = 2.0x10⁻⁴ N.

Then, electric field at the position, E = F/q

= 2.0x10⁻⁴ / 5.0x10⁻⁶ N.C⁻¹.

= 40  N.C⁻¹.

Hence,  the magnitude of the electric field at the location of the test charge is 40  N.C⁻¹.

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Question :-

Answer :-

[tex] \rule {180pt} {2pt} [/tex]

Given :-

To Find :-

Solution :-

As per the provided information in the given question, we have been given that the Pressure is 80,000 Pascal . Area is given 0.04 m² . And, we have been asked to calculate the Thrust .

For calculating the Thrust , we will use the Formula :-

Therefore , by Substituting the given values in the above Formula :-

⇒ Thrust = Pressure × Area

⇒ Thrust = 80000 × 0.04

⇒ Thrust = 3200

Hence :-

[tex] \underline {\rule {180pt} {4pt}} [/tex]

Provided that:

To determine:

Solution:

Using concept:

Using formula:

Required Solution:

»»» Pressure = Force/Area

»»» Pressure = Thrust/Area

»»» 80000 = Thrust/0.04

»»» 80000 x 0.04 = Thrust

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(10 tiles/sec) · (30 cm/tile)  =  300 cm/sec

That's  3000 mm/sec

That's  3 x 10³  mm/sec

A physical change is one in which there is no new substance formed.

A physical change is one in which there is no new substance formed. On the other hand, a new substance is formed in a chemical change. The following are cues that can show that a chemical change has taken place;

In the absence of any of these, the experiment is a physical change. The question is incomplete as the observations were not shown here.

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Answer:

Answer:

45 J

Explanation:

Potential difference (V)= 15 V

Charge (Q)= 3C

We know that

The potential difference(p.d) between two point in an electric circuit is defined as the amount of work done in moving a unit charge from one point to the other point.

Potential difference (V) = work done (W)/Charge (Q)

V= W/Q

Putting the values in the above formula we get:

15 V = W / 3 C

W= 15 V × 3 C

W= 45 J

Hence, the work done in moving the charge is 45 J.

Apply ohms law

[tex]\\ \rm\Rrightarrow I=\dfrac{V}{R}[/tex]

[tex]\\ \rm\Rrightarrow I=\dfrac{24}{9}[/tex]

[tex]\\ \rm\Rrightarrow I=2.7A[/tex]

v=λf

v=0.5 x 100

v = 50 m/s

Answer:

hurricane

Explanation:

Answer:

if the thrust is increased