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3 years ago

State Archimedes' principle.

Physics

2 answers:

vampirchik [111]3 years ago

8 0

Answer:

Archimedes' principle states that, when a body is partially or completely immersed in a fluid, it experiences an apparent loss in weight that is equal to the weight of the fluid displaced by the immersed part of the body.

Explanation:

Archimedes' principle allows the buoyancy of an object partially or fully immersed in a fluid to be calculated. The downward force on the object is simply its weight. Thus, the net force on the object is the difference between the magnitudes

of the buoyant force and its weight. If this net force is positive, the object rises; if negative, the object sinks; and if zero, the object is neutrally buoyant - that is, it remains in place without either rising or sinking. In simple words,

uranmaximum [27]3 years ago

6 0

Explanation:

when a body is wholly or partially submerged in the water or any other fluid , the buoyant force on the body is equal to the weight of displaced water or fluid .

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19.A 20 kg sign is pulled by a horizontal force such that the single rope (originally vertical) holding the sign makes an angle

Andreyy89

Answer:

A) $T=209.94N$

B) $F=75.24N$

Explanation:

Using the free body diagram and according to Newton's first law, we have:

$\sum F_y=Tcos(21^\circ)-mg=0(1)\\\sum F_x=F-Tsin(21^\circ)=0(2)$

A) Solving (1) for T:

$T=\frac{mg}{cos(21^\circ)}\\T=\frac{20kg(9.8\frac{m}{s^2})}{cos(21^\circ)}\\T=209.94N$

B) Solving (2) for F:

$F=Tsin(21^\circ)\\F=(209.94N)sin(21^\circ)\\F=75.24N$

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3 years ago

Periodic table answers

UkoKoshka [18]

Where's the periodic table?

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3 years ago

A 2 kg ball is thrown down with 50J of energy from a height of 10m, what is its velocity before it strikes the ground (neglect a

pochemuha

Answer:

V=14

Explanation:

PE=KE

mgh=1/2mv^2

2(9.8)10=1/2(2)v^2

(radical) 196= (radical)v

V=14

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3 years ago

Suppose that a car traveling to the west (-x direction) begins to slow down as it approaches a traffic light. Make a statement c

nata0808 [166]

Answer:

The car is decelerating and its acceleration is negative.

Explanation:

First thing to consider. The car traveling direction is not important to answer the question.

Second, there are two affirmations on each sentence. So, lets take definitions:

Deceleration: Reducing the acceleration, from one value to another. No matter if the acceleration for the moment is positive or negative.

Acceleration negative: the driver is applying a force to make speed=0, the sign of this force must negative in order for the car to stop, other way it will go faster. Acceleration is the change rate of speed, if the speed is going down, the total acceleration until cars stops must be negative.

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3 years ago

There is a simple pattern for determining if a binary number is odd. what is it and why does this pattern occur

frez [133]

The answer to this question would be the least number (right most number).

If you add an even number with even number, the result should be even. But if there is just one odd number added, it will be odd.
In binary, all the number is multiplied by $2^{x}$ . It is pretty clear that all the number should be even beside the first/lowest multiplier $2^{0}$ which has potential to be 1.

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4 years ago

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