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3 years ago

What is lever and explain its working principle

1 answer:

7 0

Ans: Principle of the lever HTML5

The lever is a simple machine that changes the magnitude and direction of the force applied to move an object. It minimizes the effort required to lift the object. A lever is a rigid bar which moves around a supporting point (pivot or fulcrum). The object to be lifted is placed on the bar.

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(a) Find the voltage near a 10.0 cm diameter metal sphere that has 8.00 C of excess positive charge on it. (b) What is unreasona

antoniya [11.8K]

Answer:

Part a)

$V = 7.2 \times 10^{11} Volts$

Part b)

this is a large potential which can not be possible because at this high potential the air will break down and the charge on the sphere will decrease.

Part C)

here we can assume the sphere is placed at vacuum so that there is no break down of air.

Explanation:

Part a)

As we know that the potential near the surface of metal sphere is given by the equation

$V = \frac{kQ}{R}$

here we have

Q = 8 C

R = 10.0 cm

now we have

$V = \frac{(9\times 10^9)(8 C)}{0.10}$

$V = 7.2 \times 10^{11} Volts$

Part b)

this is a large potential which can not be possible because at this high potential the air will break down and the charge on the sphere will decrease.

Part C)

here we can assume the sphere is placed at vacuum so that there is no break down of air.

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3 years ago

Explain what it means when we say a substance is magnetic.

Viefleur [7K]

That is type of substance which produce magnetic field

(Example: fridge magnet)

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4 years ago

What is the total charge of 1.0g of electrons?

Serhud [2]

<span>1.0 gram (g) of electrons would contain 10^27 electrons Electrons have an electric charge of −1.602×10−19 coulomb so total charge of 1 g electrons = -1.602 x 10^-19 x 10^27 = -1.602 x 10^8</span>

8 0

3 years ago

Problem 3.28 (a) In outer space, far from other objects, block 1 of mass 51 kg is at position <5, 15, 0> m, and block 2 of

lbvjy [14]

Answer: 8.242 × 10 exp -8 N

Explanation: F = G *m* M/r^2

r = √(13-5)^² + (51-15)^² + (0-0)²

r = 8; the distance between the masses

G =6.673 × 10 -¹¹ Nm²kg-²

F = gravitational force of attraction of m(51kg) on M {1550kg)

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3 years ago

The mechanical advantage shown in the image is?

Wewaii [24]

Mechanical Advantage= output force/input force. So, 156/52=3. You're MA is 3.

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3 years ago

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What is lever and explain its working principle​

What is lever and explain its working principle