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Anuta_ua [19.1K]

3 years ago

11

(a a very powerful vacuum cleaner has a hose 2.68 cm in diameter. with the end of the hose placed perpendicularly on the flat fa

ce of a brick, what is the weight of the heaviest brick that the cleaner can lift?

1 answer:

Katena32 [7]3 years ago

5 0

It depends on how powerful its suction is.

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A 2 kg melon is balanced on your bald uncle’s head. His son, Throckmorton, shoots a 50 g (0.05kg) arrow at it with a speed of 30

sineoko [7]

Answer:

The speed of the melon as it flies off the man’s head is 0.3 m/s.

Explanation:

Given;

mass of the melon, m₁ = 2 kg

initial speed of the melon, u₁ = 0

mass of arrow, m₂ = 0.05 kg

initial speed of the arrow, u₂ = 30 m/s

final speed of the arrow, v₂ = 18 m/s

let v₁ be the final speed of the melon as it flies off the man's head.

Apply the principle of conservation of linear momentum;

m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂

2(0) + 0.05 x 30 = 2v₁ + 0.05 x 18

1.5 = 2v₁ + 0.9

2v₁ = 1.5 - 0.9

2v₁ = 0.6

v₁ = 0.6 / 2

v₁ = 0.3 m/s

Therefore, the speed of the melon as it flies off the man’s head is 0.3 m/s.

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3 years ago

What is TeO3 compound name

Stolb23 [73]

Tellurium trioxide

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3 years ago

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An object moves in simple harmonic motion described by the equation d equals one fifth sine 2 t where t is measured in seconds a

tensa zangetsu [6.8K]

Answer:

The maximum displacement, the frequency, and the time required for one cycle are 1/5 inch, 1/π Hz and π sec.

Explanation:

Given that,

The equation of simple harmonic motion

$d = \dfrac{1}{5}\sin 2t$ .....(I)

We need to calculate the maximum amplitude

Using equation of simple harmonic motion

$y = a \sin\omega t$

Where, a = amplitude

$\omega$ =frequency

t = time

On comparing equation (I) and general equation

The amplitude is a maximum displacement traveled by a wave.

$a = \dfrac{1}{5}$

So, the maximum displacement is

$d= \dfrac{1}{5}\ inch$

We need to calculate the frequency

$\omega=2\pi f$

$f = \dfrac{1}{\pi}\ Hz$

We need to calculate the time required for one cycle

$t =\dfrac{1}{f}$

$t =\pi\ sec$

Hence, The maximum displacement, the frequency, and the time required for one cycle are 1/5 inch, 1/π\ Hz and π\ sec.

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What will happen when you slide the sponges in different directions?

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Transform boundary

is the answer from stemscopes

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How does size influence the appearance of a star? Give an example in your response.

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The size of the star defines wither of not it is a dwarf star, or a red giant.

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