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2 years ago

Um aluno pretende construir um aquecedor usando um enrolamento de fio. Experimenta e verifica que não

Physics

1 answer:

Vlad1618 [11]2 years ago

6 0

Answer:

dddjebdhdjwopdjhgvvdr

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A space shuttle is flying north at 6,510 m/s. It

Maksim231197 [3]

Answer:

7808 m/s

Explanation:

Find NE velocity after 60 s of acceleration in that direction:

= a t = 28.4 m/s^2 * 60 s = 1704 m/s

Vertical component = 1704 sin 45 = 1204.9 m/s

Horiz component = 1704 cos 45 = 1204.9 m/s

Add the two vertical components

6510 + 1204.9 = 7714.9 m/s = vertical velocity

Pythagorean theorem to find resultant of vertical and horiz v's

Vf ^2 = 1204.9^2 + 7714.9^2 0

Vf = 7808. m/s

7 0

1 year ago

Jump to Question: Which of these is not required for current to flow through a conductor? A. Source of electrical current B. Som

amid [387]

I believe it is D. something with air molecules

7 0

3 years ago

Read 2 more answers

An object of mass 0.50 kg is transported to the surface of Planet X where the object’s weight is measured to be 20 N. The radius

Olin [163]

Answer:

$g'=40\ m.s^{-2}$

Explanation:

Given:

mass of the object, $m=0.5\ kg$

weight of the object on planet x, $W=20\ N$

radius of the planet, $R=4\times10^6\ m$

radial distance between the planet and the object, $r=2\times 10^6\ m$

<u>Now free fall acceleration on planet X:</u>

$W=m.g'$

$20=0.5\times g'$

$g'=40\ m.s^{-2}$ irrespective of the height.

8 0

3 years ago

Read 2 more answers

A 4.75 kg block is sent up a ramp inclined at an angle ????=31.5° from the horizontal. It is given an initial velocity ????0=15.

Colt1911 [192]

Answer:

d = 13.7 m

Explanation:

When block is moving upwards along the inclined plane

then the block is decelerated due to gravity as well as due to friction and speed of the block by which it is projected upwards is given

$v_i = 15 m/s$

deceleration caused to the block due to net force opposite to the motion is given as

$F = - mg sin\theta - \mu mgcos\theta$

$a = \frac{F}{m}$

$a = -g(sin\theta + \mu cos\theta)$

since block is sliding on the inclined plane

so here we can say that the coefficient of the friction must be kinetic friction here

$a = -9.81(sin31.5 + 0.368 cos31.5)$

$a = - 8.2 m/s^2$

now for finding the distance upto which it will stop is given as

$v_f^2 - v_i^2 = 2 a d$

$0 - 15^2 = 2(-8.2) d$

$d = 13.7 m$

8 0

2 years ago

The world’s supply of fossil fuels will _____.

Mekhanik [1.2K]

The world’s supply of fossil fuels will dwindle slowly until a replacement source is found that provides the same power.

bc some day we will actually run out of it and find sth that gives power

3 0

2 years ago

Read 2 more answers