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4 years ago

A large electrostatic generator is commonly called a(n) _____.

2 answers:

5 0

The correct answer is Van de Graaff generator. A large electrostatic generator is commonly called a Van de Graaff generator. This large generator is a device for the production of high voltage by means of endless belt collecting of electrostatic charge.

Tju [1.3M]4 years ago

4 0

Answer: B. Van de Graaff generator

Explanation:

Van de Graaff generator is an electrostatic generator. It accumulates charge on a metallic dome via moving belt which creates a high electric potential.

A motor drives a pulley and insulating belt. A metal comb is given a positive voltage which draws electron from the belt.The positively charged belt moves upwards where another metal comb allows this positive charge to spread on the metallic dome.

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Answer:

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3 years ago

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2. A man in a hot air balloon drops his “five guy's hamburger” over the edge of the basket. The

disa [49]

Answer:

19.3 m/s

Explanation:

Considering that no initial velocity was imparted to the hamburger, then we can use the distance covered formula for motion under constant acceleration (that of gravity) and solve for the time it took to reach the ground.

D = vi * t + (1/2) a * t^2

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19 = 0 + 4.9 t^2

t^2 = 19/4.9

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3 years ago

A piece of wire 29 m long is cut into two pieces. One piece is bent into a square and the other is bent into an equilateral tria

skelet666 [1.2K]

Answer:

Explanation:

Total length of the wire is 29 m.

Let the length of one piece is d and of another piece is 29 - d.

Let d is used to make a square.

And 29 - d is used to make an equilateral triangle.

(a)

Area of square = d²

Area of equilateral triangle = √3(29 - d)²/4

Total area,

$A = d^{2}+\frac{\sqrt3}{4}\left ( 29-d \right )^{2}$

Differentiate both sides with respect to d.

$\frac{dA}{dt}=2d- \frac{\sqrt3}{4}\times 2(29-d)$

For maxima and minima, dA/dt = 0

d = 8.76 m

Differentiate again we get the

$\frac{d^{2}A}{dt^{2}}= + ve$

(a) So, the area is maximum when the side of square is 29 m

(b) so, the area is minimum when the side of square is 8.76 m

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3 years ago

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Explanation:

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3 years ago

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Answer: Mohs Scale

Explanation: Mohs Scale of Hardness

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3 years ago