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telo118 [61]
3 years ago
9

Which would be best categorized as heat transfer by convection?

Physics
1 answer:
pantera1 [17]3 years ago
6 0

Answer:

B

Explanation:

there are three modes of heat transfer which are

  1. conduction
  2. convection
  3. radiation

Conduction is a mode of heat transfer in solid materials

Convection refers to a mode of heat transfer of fluids in motion.

Radiation occurs when heat moves as energy waves in form of infrared radiation. The energy from the sun reaches us by radiation.

From the list of options;

option A refers prevention of heat transfer by radiation

option B refers to noodles rising and falling in a poy of boiling water. The path which the noodles move shows the convective path of the fluid.

option C refers to heat transfer by conduction

Option D refers to oth convection and radiation as modes of heat transfer.

option B best describes heat transfer by convection

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A car and a truck collide in an intersection and the merged wreck continues along. During the collision. both kinetic energy and
Vilka [71]

Answer:

C. Momentum is conserved but not kinetic energy.

Explanation:

This case represents an entirely inelastic collision, that is, a collision between the car and the truck that reduces total kinetic energy of the entire system, whereas linear momentum is conserved. Hence, correct answer is C.

5 0
3 years ago
You are sitting 3 m away from you friend who is watching a cartoon on his phone. How will the sound itensity change if your frie
Zinaida [17]

Answer:

Decreases by $3.6 \times 10^{-3}$ times

Explanation:

The intensity of a sound is defined as the energy of the sound that is flowing in an unit time through the unit area which is in the direction that is perpendicular to the direction of the sound waves movement.

The intensity of energy is described by the inverse square law. It states that the intensity varies inversely with the distance square of the distance.

In other words, the sound intensity decreases as inversely proportional to the squared of the distance.  i.e. $\frac{1}{r^2}$

In the context when the distance was 3 m, the intensity of the sound was = $\frac{1}{9}$

But when the distance became 6 cm or 0.06 m, the sound intensity decreases by =  $\frac{1}{0.06^2}$

                       = $3.6 \times 10^{-3}$ times

3 0
3 years ago
Monochromatic coherent light shines through a pair of slits. If the wavelength of the light is decreased, which of the following
Law Incorporation [45]

Answer:

he correct answers are a, b

Explanation:

In the two-slit interference phenomenon, the expression for interference is

          d sin θ= m λ                       constructive interference

          d sin θ = (m + ½) λ             destructive interference

in general this phenomenon occurs for small angles, for which we can write

           tanθ = y / L

           tan te = sin tea / cos tea = sin tea

           sin θ = y / La

un

derestimate the first two equations.

Let's do the calculation for constructive interference

         d y / L = m λ

the distance between maximum clos is and

         y = (me / d) λ

this is the position of each maximum, the distance between two consecutive maximums

         y₂-y₁ = (L   2/d) λ - (L 1 / d) λ₁          y₂ -y₁ = L / d λ

examining this equation if the wavelength decreases the value of y also decreases

the same calculation for destructive interference

         d y / L = (m + ½) κ

         y = [(m + ½) L / d] λ

again when it decreases the decrease the distance

the correct answers are a, b

7 0
3 years ago
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irga5000 [103]

Answer:

Refer to the attachment.

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Which element could not form in the sun and would have to be formed in a supernova?
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