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brilliants [131]
1 year ago
15

It is desired to project the image of an object five times it's actual size using a lens of focal length 30 cm how far from the

lens should the object be placed
Physics
1 answer:
Maurinko [17]1 year ago
6 0

Answer:

focal length have radian.. sjsbxhxnxnsb

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What best describes a sound wave? transverse and electromagnetic longitudinal and mechanical longitudinal and electromagnetic tr
GalinKa [24]

Sound needs medium to travel and it can not travel without medium

so sound wave is a travelling wave

now we also know that sound wave propagate in form of rarefaction and compression.

So all medium particles travel in the direction of wave only

so it is a longitudinal wave also

so correct answer will be

<em>mechanical longitudinal </em>

7 0
3 years ago
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Someone solve this please...........​
Natali [406]

Answer:

The answer is 4x³ + 6x²

<u>-TheUnknownScientist</u><u> 72</u>

4 0
3 years ago
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What is the equivalent resistance between terminals A and B, measured in ohms?
Usimov [2.4K]

Answer:

c. 0.80

Explanation:

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8 0
3 years ago
James Joule (after whom the unit of energy is named) claimed that the water at the bottom of Niagara Falls should be warmer than
Molodets [167]

Answer:

0.12 K

Explanation:

height, h = 51 m

let the mass of water is m.

Specific heat of water, c = 4190 J/kg K

According to the transformation of energy

Potential energy of water = thermal energy of water

m x g x h = m x c x ΔT

Where, ΔT is the rise in temperature

g x h =  c x ΔT

9.8 x 51 = 4190 x ΔT

ΔT = 0.12 K

Thus, the rise in temperature is 0.12 K.

7 0
3 years ago
Can someone please describe surface tension to me. Please don't give me the dictionary definition. Thank you
11111nata11111 [884]


Surface tension - My definition -

It's exactly what it says - The tension of a surface with a liquid (such as water), caused by the attraction of the surfaces layer ---- I hope this helps ---- I actually did research it and got some of this from a dictionary, but I changed some of it, too.... Sorry if this doesn't help :)

6 0
3 years ago
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