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3 years ago

Convection only occurs in what? a. gases b. fluids c. liquids d. solids

Physics

2 answers:

Butoxors [25]3 years ago

7 0

the answer on edginuity is B- Fluids (i just took the test)

vekshin13 years ago

3 0

Answer:

b. Fluids

Explanation:

Convection is one of the three methods of transfer of heat. Let's define them all:

- Conduction: conduction occurs when two objects (or two substances) are in contact with each other; heat is transferred from the warmer object to the colder object by the collisions between the particles of the warmer object (which have on average greater kinetic energy) and the particles of the colder object (which have on average smaller kinetic energy). This type of heat transfer can occur in solids, liquids and gases.

- Convection: convection occurs when there is a fluid which is heated from a heat source. As the part of the fluid closer to the heat source becomes warmer, it becomes less dense and it expands, rising and being replaced by the part of the fluid which is colder. Then, the mechanism continues, generating a convection current (like a cycle) which transport the heat over the whole fluid. This method of heat transfer occurs in fluids (liquids and gases) only.

- Radiation: radiation occurs when heat is carried by electromagnetic waves (which transport energy, so also heat, through space). Radiation can occur in any medium, and can also occur in vacuum since electromagnetic waves can travel in vacuum as well.

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Choose whether each of the following statements is true or false. In order to move a massive crate sitting on the floor, the for

velikii [3]

Answer:

Explanation:

1. False

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The force must over come the static frictional force between the crate and the floor.

2. True

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3. True

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3 years ago

What happens with the plates at this Juan de fuca

djverab [1.8K]

Answer:

Subduction of the Juan de Fuca plate causes melting and magma generation in the mantle which rises to the surface to create the Cascade volcanoes.

Explanation:

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3 years ago

A formula for the normal systolic blood pressure for a man age a , measured in mmhg, is given as p=0. 006a2−0. 02a 120. Find the

djyliett [7]

The age of a man whose normal blood pressure measures 123 mm of hg

9 years

<h3>What is Quadratic equation ?</h3>

A quadratic equation as an equation of degree 2, meaning that the highest exponent of this function is 2. The standard form of a quadratic equation is y = a $x^{2}$ + bx + c, where a, b, and c are numbers and a cannot be 0

P(A) = 0.006 $a^{2}$ - 0.02a + 120

123 = 0.006- 0.02a + 120

0=0.006 $a^{2}$ - 0.02a - 3

you can use the quadratic equation formula to solve for the man's age.

A = (-b ± ( $\sqrt{b^{2} - 4*a*c}$ ) ) / (2a)

A = (0.02 ± $\sqrt{(-0.02)^{2} - 4*0.006*(-3)}$ / (2*0.006)

A = (0.02 ± $\sqrt{0.0076}$ ) / 0.012

A = 9 , -5.67

Age of the man will be 9 years

To learn more about quadratic equation here

brainly.com/question/17177510?referrer=searchResults

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2 years ago

The fastest man alive can run the 100 meter dash in 9.58 seconds, calculate average speed in meters per second

densk [106]

Answer:

100 ÷ 9.58 = 10.44 (approximate answer)

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3 years ago

What type of simple machine can pinball machine flippers can be explained?

vaieri [72.5K]

Answer:

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2 years ago