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3 years ago

What is the medium for the waves in the photograph?

Physics

2 answers:

Colt1911 [192]3 years ago

8 0

Answer:

Water

Explanation:

i did the test

soldi70 [24.7K]3 years ago

5 0

Answer:

d. water

Explanation:

The energy of a mechanical wave can travel only through matter. The matter through which the wave travels is called the medium (plural, media). The medium in the water wave pictured above is water, a liquid.

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Electrons contribute___

dangina [55]

C, electrons are negative, and most of the atom’s mass comes from the nucleus of the atom

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3 years ago

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Gold in its pure form is too soft to be used for most jewelry. Therefore, the gold is mixed with other metals to produce an allo

Novay_Z [31]

Answer:

Explanation:18kt alloy contains

i) 75% of gold

rhogold=19.3g/cm^3

=75/100×19.3

=14.475g/cm^3

ii) 16% of silver

rhosilver=10.5g/cm^3

=16/100×10.5

=1.68g/cm^3

iii) 9% of copper

rhocopper =8.90g/cm^3

=9/100×8.9

=0.801g/cm^3

Overall density of 18kt gold

=(0.801+1.68+14.475)g/cm^3

=16.956g/cm^3

=17g/cm^3 to 3s.f

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3 years ago

A typical nuclear fission power plant produces about 1.00 GW of electrical power. Assume the plant has an overall efficiency of

mamaluj [8]

Answer:

mass consumed by 235U each day = 2 kg

Explanation:

electrical power produced = 1 GW = 1 × 10⁹ × (6.24151 × 10¹⁸ ) eV

= 6.24151× 10²¹ MeV/s

thermal energy = 0.420 * 250 = 105 MeV

$\dfrac{1 GW}{150 MeV}= \dfrac{6.24151\times 10^{21}}{105}$

= 5.94 × 10¹⁹ fission/second

=5.94 × 10¹⁹× 24 × 60 ×60)

= 5.13 × 10²⁴ fission/day

mu = 235.04393 × 1.660× 10 ⁻²⁷ = 390.1729× 10⁻²⁷ Kg

M = mu ×5.13 × 10²⁴

= 390.1729× 10⁻²⁷ ×5.13 × 10²⁴

M = 2 kg(approx.)

mass consumed by 235U each day = 2 kg

3 0

3 years ago

2.A chef leaves a copper spoon, a wooden spoon, and a steel spoon in a pot of boiling soup for several minutes. Which spoon shou

Shkiper50 [21]

Answer:

Option B

Explanation:

The correct answer is Option B

After leaving the spoon of copper , steel and wooden in the soup for several minute chef can grab Wooden spoon with bare hand.

Wooden material are insulator of heat means heat does not transfer through the wooden material.

where as heat transfer take place in steel as well as copper and chef will not be able to lift the spoon bare hand.

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3 years ago

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A group of hikers hear an echo 2.6 s after they shout. The temperature is 20 ◦C. How far away is the mountain that reflected the

Vadim26 [7]

Answer:

$x = 445.9\,m$

Explanation:

The velocity of sound in air at 20 °C is 343 meters per second. The distance of mountain can be derived by the following expression:

$2\cdot x = v_{air}\cdot \Delta t$

$x = \frac{v_{air}\cdot \Delta t}{2}$

$x = \frac{(343\,\frac{m}{s} )\cdot (2.6\,s)}{2}$

$x = 445.9\,m$

4 0

3 years ago