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Delvig [45]
3 years ago
12

There is a fixed voltage across a resistor, and you measure a current of c1 A. If you replace the resistor with one that has twi

ce the resistance value, how much current will you measure? a) 0.2 A b) 0.5 A c) 0.8 A d) 1.1 A
Physics
1 answer:
prisoha [69]3 years ago
4 0

Answer:

Option B

Explanation:

Given

The current flowing through the circuit = 1 Ampere

As we know

I is inversely proportional to resistance.

I α 1/r

or I = k/r

If the resistor "r" is replaced by any resistor "R" with resistance = 2r, then the current will be

I = 1/2 of 1 ampere

I = 0.5 Ampere

Hence, option B is correct

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The connections between neurons in the retina, specifically the connections referred to as “lateral inhibition,” help us see whi
Vanyuwa [196]
1)
The connections between neurons in the retina, specifically the connections referred to as “lateral inhibition,” help us see which of the following better?

<em><u>A) Contrast</u></em>
B) Faces
<span>C) Colors

2)
</span>Improving the contrast of an image (making the dark regions darker and the light regions lighter) helps us to identify:

<em><u>A) The edges of objects</u></em>
B) The center of objects
<span>C) The color of an object
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3)
What assumption does our visual system make in order to see curved surfaces (domes, holes)?

<em><u>A) Light comes from above</u></em>
B) Curved surfaces are always evenly lit
<span>C) Curved surfaces are always easy to see, no assumptions are made
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4)
Which part of the face does our brain pay the most attention to?

<u><em>A) Eyes and mouth</em></u>
B) Eyes and ears
<span>C) Eyes and chin
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5)
If all these assumptions sometimes lead to mistakes, for example in these optical illusions, why do we make them?

A) It helps us see things faster
B) It helps us see things correctly
C) It helps us pay attention to what's important
<em><u>D) All of the above
</u></em>

Hope that helps :)
<span>*the correct answers are bolded, italicized, and underlined.*</span>
5 0
3 years ago
A beam of light traveling in air strikes a glass slab at an angle of incidence less than 90°. After entering the glass slab, wha
omeli [17]

Answer:

It gets refracted.

Explanation:

When light beam travels through different mediums they refract i.e. they change their direction.  Here the angle of incidence is less than 90°. After entering the glass slab the light beam will move towards the normal (a line drawn perpendicular to the interface of the two mediums). Thus the  angle of refraction will be even lesser than angle of incidence.

8 0
4 years ago
What substance is the genetic material of living things?
Alik [6]
I believe it's DNA.
Here're some sentences to explain:

Genetic material, also known as deoxyribonucleic acid<span> (</span>DNA<span>) and </span>Ribonucleic acid<span> (</span>RNA<span>), plays a fundamental role in the composition of living organisms.</span>
3 0
4 years ago
Calculate the amount of hcn that gives the lethal dose in a small laboratory room measuring 14 × 15 × 8.0ft. the density of air
vova2212 [387]
Since we are given the density and volume, then perhaps we can determine the amount in terms of the mass. All we have to do is find the volume in terms of cm³ so that it will cancel out with the cm³ in the density. The conversion is 1 ft = 30.48 cm. The solution is as follows:

V = (14 ft)(15 ft)(8 ft)(30.48 cm/1 ft)³ = 0.0593 cm³

The mass is equal to:
Mass = (0.00118g/cm³)(0.0593 cm³)
Mass = 7 grams of HCN
7 0
3 years ago
The Chandra X-ray observatory is BEST equipped to search for which types of stars? Select all that apply.
Papessa [141]
The right answer for the question that is being asked and shown above is that: "A. neutron; B. red giants; C. black holes; E. main sequence." The Chandra X-ray observatory is BEST equipped to search for neutron, red giants, black holes, <span>main sequence.</span>
3 0
4 years ago
Read 2 more answers
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