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ddd [48]
3 years ago
12

Direction: Write TRUE if the statement is correct, and FALSE if it is not

Physics
1 answer:
Ostrovityanka [42]3 years ago
3 0

-----------------------------------------------------------------------------------------------------------------

When light strikes a black surface, it is reflected by the surface and

nothing is absorbed    This would be False because black absorbs the light not reflect

Mirrors are used in telescopes because they have the ability to reflect

True? Telescopes designed with mirrors avoid the problems of refracting telescopes. Because the light is reflected from the front surface only, flaws and bubbles within the glass do not affect the path of the light

Transmission in the passing of light through some materials​

False? Some materials allow much of the light that falls on them to be transmitted through the material without being reflected. Materials that allow the transmission of light waves through them are called optically transparent. ... Materials which do not allow the transmission of any light wave frequencies are called opaque.

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What is a gear. Please give detailed explanation
mestny [16]

Answer:

gear is part of vehicle.it helps.

3 0
3 years ago
Read 2 more answers
Using the formula 1/2 (m x v2), what is the kinetic energy of a 4 kg rock falling through the air at 5 m/s
aivan3 [116]

Answer:

KE = 50J

Explanation:

KE = \frac{1}{2}mv^{2} \\\\ KE = \frac{1}{2}(4)(5)^{2} \\\\ KE = 2(25) \\\\ KE = 50J

5 0
3 years ago
Lightning As a crude model for lightning, consider the ground to be one plate of a parallel-plate capacitor and a cloud at an al
olga nikolaevna [1]

Answer:

6.67154\times 10^{-9}\ F

13.009503 C

Explanation:

\epsilon_0 = Permittivity of free space = 8.85\times 10^{-12}\ F/m

k = Dielectric constant of air 3\times 10^6\ V/m

Side of plate = 0.7 km

A = Area

d = Distance = 650 m

Capacitance is given by

C=\dfrac{\epsilon_0A}{d}\\\Rightarrow C=\dfrac{8.85\times 10^{-12}\times 700^2}{650}\\\Rightarrow C=6.67154\times 10^{-9}\ F

The capacitance is 6.67154\times 10^{-9}\ F

Electric field is given by

Q=CV\\\Rightarrow Q=Ckd\\\Rightarrow Q=6.67154\times 10^{-9}\times 3\times 10^6\times 650\\\Rightarrow Q=13.009503\ C

The charge on the cloud is 13.009503 C

7 0
3 years ago
In a perfectly inelastic one-dimensional collision between two moving objects, what condition alone is necessary so that the fin
ser-zykov [4K]

What condition alone is necessary so that the final kinetic energy of the system is zero after the collision?

<u>Option(a). </u>The objects must have initial momenta with the same magnitude but opposite directions.

What is a momentum?

  • In Newtonian mechanics, linear momentum, translational momentum, or simply momentum is the product of the mass and velocity of an object.
  • It is a vector quantity, possessing a magnitude and a direction.
  • If m is an object's mass and v is its velocity (also a vector quantity), then the object's momentum p is :p=mv.
  • In the International System of Units (SI), the unit of measurement of momentum is the kilogram metre per second (kg⋅m/s), which is equivalent to the newton-second.

To know more about momentum, refer:

brainly.com/question/1042017

#SPJ4

5 0
2 years ago
Parts of a transverse wave include:
iris [78.8K]

Answer:

Parts of a transverse wave include:

Crest - the highest point on the wave

Trough - the lowest point on the wave

Wavelength - the distance from one crest to the next crest, or one trough to the next trough

Amplitude - the displacement of the wave from the midpoint to the highest point (crest) or the lowest point (trough)

Explanation:

Use the internet Brother

8 0
3 years ago
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