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yulyashka [42]
3 years ago
15

For which optical devices does d¡ always have a negative value?

Physics
2 answers:
Vlad1618 [11]3 years ago
7 0

Answer: B and D

Explanation:

Dmitry [639]3 years ago
6 0

Answer:

Explanation:

A i think

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Similar fossiles found all over the world true or false?
sergij07 [2.7K]

Answer:

yes

Explanation:

pangea moved dinosouars and other spices all aroud the world. just like how you can find the same types of birds in some places with very few differsencs  

7 0
3 years ago
Which best describes a value for density
scoray [572]
Density can be any number, as long as it has the right units.

A unit of density has to be (a unit of mass) divided by (a unit of volume).
The most common one is gram/cm^3.
8 0
3 years ago
A radio station broadcasts its music with waves at a frequency of 7.34 x 10²Hz. These radio waves travel at a speed of 3.00x 10%
Lorico [155]

Answer:

See below

Explanation:

<u>I will use   3 x 10^8 m/s for speed or wave</u>

speed = wavelength * frequency

3 x 10^8  = w * 7.34 x 10^2     <====== are you sure this isn't KILO Hz ?

w = <u>408719. 3 meters   </u>

4 0
2 years ago
Janet is an environmental scientist studying how the behavior of humans in urban areas affects the surrounding natural environme
Diano4ka-milaya [45]

<em>For this case we have that by definition, the social sciences group all the scientific disciplines whose object of study is linked to the activities and behavior of human beings. The social sciences, therefore, analyze the manifestations of society, both material and symbolic.</em>

The surrounding natural environment is an environment that is mostly social. Therefore, using, using the mentioned definition, we need to consulate a social scientist.

This person can give information about the behavior of humans in social areas.

Then, Janet can get help from a social scientist.

Answer:

Option A

3 0
3 years ago
If a certain gas occupies a volume of 12 l when the applied pressure is 6.0 atm , find the pressure when the gas occupies a volu
dolphi86 [110]
From Boyle's law, the volume of a fixed mass of a gas is inversely proportional to its pressure at constant absolute temperature. 
Therefore; P1V1 =P2V2; where PV is a constant
hence; 12 × 6 = 3× p2
           p2 = 72/3
                = 24 atm
Therefore; the new pressure will be 24 atm
5 0
3 years ago
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