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Reika [66]
3 years ago
5

How do simple machines make work easier?

Physics
2 answers:
miss Akunina [59]3 years ago
8 0
It is A: They add energy to the work

Mrrafil [7]3 years ago
3 0

Answer:  D.  They increase the distance over which a force is applied.

Explanation:

Simple machines are basic mechanical devices which make our work easier like lever, pulley, wheel and axle, inclined plane, wedge and screw. The magnitude of the force or direction is altered using a simple machine. They increase the distance over which a force is applied. They use mechanical advantage to increase the magnitude of the force.

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Find the Force a Watermelon hits the ground with when it is dropped off a roof and has a mass of 18 kg
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Answer:

Explanation:

Weight = Force

Weight = mass x gravity

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Weight = 176.58 N

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3 years ago
Define valence electrons
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Answer:

In chemistry and physics, a valence electron is an outer shell electron with an atom, and that can participate in the formation of a chemical bond if the outer shell is not closed; in a single covalent bond, both atoms in the bond contribute one valence electron in order to form a shared pair.

Explanation:

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4 years ago
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The rate at which a candle burns in millimeters per minute is:
anzhelika [568]
since both components, length and time, are measurable 
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3 years ago
A particle with charge q and momentum p, initially moving along the x-axis, enters a region where a uniform magnetic field* B=(B
VMariaS [17]

Answer:

Magnitude of momentum = q × B0 × [d^2 + 2L^2] / 2d.

Explanation:

So, from the question, we are given that the charge = q, the momentum = p.

=> From the question We are also given that, "initially, there is movement along the x-axis which then enters a region where a uniform magnetic field* B = (B0)(k) which then extends over a width x = L, the distance = d in the +y direction as it traverses the field."

Momentum,P = mass × Velocity, v -----(1).

We know that for a free particle the magnetic field is equal to the centrepetal force. Thus, we have the magnetic field = mass,.m × (velocity,v)^2 / radius, r.

Radius,r = P × v / B0 -----------------------------(2).

Centrepetal force = q × B0 × v. ----------(3).

(If X = L and distance = d)Therefore, the radius after solving binomially, radius = (d^2 + 2 L^2) / 2d.

Equating Equation (2) and (3) gives;

P = B0 × q × r.

Hence, the Magnitude of momentum = q × B0 × [d^2 + 2L^2] / 2d.

4 0
3 years ago
For Al, its atomic number is 13 and its mass number is 27. How many neutrons does it have? A. 13 B. 14 C. 26 D. 27 E. 40
sveta [45]

Answer:

B. 14

Explanation:

For an element:

- Atomic number: is the number of protons in the nucleus (p)

- Mass number: it is the number of protons (p) + neutrons (n) in the nucleus

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p = 13

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Substituting the first equation into the second one, we find the number of neutrons:

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5 0
4 years ago
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