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goldfiish [28.3K]

2 years ago

10

Obi Wan hears the destruction of a planet and all of its people through 'the force'. These sounds are only in his head and are n

ot carried through space, since space has no _____ through which sound could transmit.

1 answer:

trapecia [35]2 years ago

6 0

Answer:

medium

Explanation:

<em>A sound </em><em>medium</em><em> is defined as channel through which sound can travel or be transmitted. </em>

Sound medium could be in the form gases, liquids, solids or plasmas. Space is made up of vacuum and therefore, has no medium within it. Hence, space cannot transmit sound in any form or allows sound to travel through it.

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Which one of the following statements does not accurately describe vibrations?

Paladinen [302]

A. Forced vibrations, such as those between a tuning fork and a large cabinet surface, result in a much lower sound than was produced by the original vibrating body.

4 0

2 years ago

Which statements describe a situation with a displacement of zero? Check all that apply.traveling south for 30 miles, then turni

cluponka [151]

Answer:

• riding on a Ferris wheel whose entrance and exit are the same

• walking around the block, starting from and ending at the same house

• running exactly one lap around a racetrack

Explanation:

Displacement simply means the.change in position of an object. In a situation whereby the initial and final position are thesame, the displacement will be zero.

The statements that describe a situation with a displacement of zero include:

• riding on a Ferris wheel whose entrance and exit are the same

• walking around the block, starting from and ending at the same house

• running exactly one lap around a racetrack

5 0

2 years ago

Test yourself: 1

Dmitry_Shevchenko [17]

Answer:

F = 1500 [N]

Explanation:

To solve this problem we must use Newton's second law, which tells us that the sum of all forces must be equal to the product of mass by acceleration.

ΣF = m*a

F = 1000*1.5

F = 1500 [N]

6 0

2 years ago

What happens to a blackbody radiator as it increases in temperature?

DedPeter [7]

Answer:

it gives off a range of electromagnetic radiation of shorter wavelengths.

Explanation:

I took the test

8 0

2 years ago

Read 2 more answers

Two constant forces act on an object of mass m = 5.60 kg object moving in the xy plane as shown in the figure below. Force F1 is

Gnoma [55]

Answer:

Part a)

$F_1 = 22.5\hat i + 15.7 \hat j$

$F_2 = -35.5 \hat i + 20.5 \hat j$

Part b)

$F = -10 \hat i + 36.2 \hat j$

Part c)

$a = -1.78 \hat i + 6.46 \hat j$

Part d)

$v_f = -0.64 \hat i + 21.93\hat j$

Part e)

$r_f = 6.09\hat i + 36.72 \hat j$

Part f)

$KE = 1347.7 J$

Part g)

$KE = 1348 J$

Explanation:

Part a)

first force is given as

$F_1 = 27.5 N$ at 35 degree

$F_1 = 27.5 cos35 \hat i + 27.5 sin35 \hat j$

$F_1 = 22.5\hat i + 15.7 \hat j$

Second force is given as

$F_2 = 41 N$ at 150 degree

$F_2 = 41 cos150 \hat i + 41 sin150\hat j$

$F_2 = -35.5 \hat i + 20.5 \hat j$

Part b)

Total force is given as

$F = F_1 + F_2$

$F = (22.5 - 35.5)\hat i + (15.7 + 20.5)\hat j$

$F = -10 \hat i + 36.2 \hat j$

Part c)

as we know

F = ma so object acceleration is given as

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

$a = \frac{-10}{5.60} \hat i + \frac{36.2}{5.60} \hat j$

$a = -1.78 \hat i + 6.46 \hat j$

Part d)

By kinematics we know that

$v_f = v_i + at$

$v_f = (4.70 \hat i + 2.55 \hat j) + (-1.78\hat i + 6.46\hat j)(3)$

$v_f = -0.64 \hat i + 21.93\hat j$

Part e)

As we know that final position is given as

$r_f = v_i t + \frac{1}{2}at^2$

$r_f = (4.70 \hat i + 2.55 \hat j)(3) + \frac{1}{2}(-1.78 \hat i + 6.46 \hat j)(3^2)$

$r_f = 6.09\hat i + 36.72 \hat j$

Part f)

final kinetic energy is given as

$KE = \frac{1]{2}mv_f^2$

$KE = \frac{1}{2}(5.60)(0.64^2 + 21.93^2)$

$KE = 1347.7 J$

Part g)

final kinetic energy is given as

$KE = KE_i + F.r$

$KE = \frac{1}{2}(5.60)(4.70^2 + 2.55^2) + (-10 \hat i + 36.2 \hat j).(6.09\hat i + 36.72\hat j)$

$KE =80 + 1268.4$

$KE = 1348 J$

4 0

2 years ago