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Arada [10]
3 years ago
15

Which scenarios are examples of physical changes? Select three options

Physics
1 answer:
pashok25 [27]3 years ago
4 0

Answer:

A kid becoming an adult

A leg becoming bruised

A person's blood pressure raising because they are running

need a picture to answer specific questions.

Explanation:

All of these are physical changes. Hope that this helps you and have a great day :)

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A 1-kg rock is suspended by a massless string from one end of a
maxonik [38]

Answer:

The weight of measuring stick is 9.8 N

Explanation:

given information:

the mass of the rock, m_{r} = 1 kg

measuring stick, x =1 m

d = 0.25 m

to find the weight of measuring stick, we can use the following equation:

τ = Fd

τ = 0

F_{r} d - F_{s}d = 0

F_{r} = the force of the rock

F_{s} = the force of measuring stick

F_{s} =F_{r}

    = m g

    = 1 kg x 9.8 m/s

    = 9.8 N

thus, the weight of measuring stick is 9.8 N

6 0
3 years ago
When laser light of wavelength 632.8 nm passes through a diffraction grating, the first bright spots occur at ± 17.8 ∘ from the
o-na [289]
The equation we use is mλ=dsinθ for intensity maximas. We are given at the first maximum (m=1), it occurs at 17.8 degrees. Thus we can solve for d by substituting known values into our equation.

(1) (632.8*10^-9m)=dsin(17.8) => d = 2.07*10^-6m

Next we want to find the angle at the second maximum (m=2) so we need to solve for θ.

(2) (632.8*10^-9m) = (2.07*10^-6m)sinθ

θ=37.69 degrees

Hopes this helps!

P.S. I hope this is right. If not sorry in advance.
3 0
3 years ago
A sling psychrometer works because the amount of cooling that occurs in the wet bulb is directly proportional to the ----- of th
ad-work [718]
<u>Temperature of the air</u>

According to sources, the most probable answer to this query is that the wet bulb is directly proportional to the temperature of the air. Thank you for your question. Please don't hesitate to ask in Brainly your queries. 
5 0
3 years ago
The total potential and kinetic energy of all the microscopic particles in an object make up its
Fofino [41]
The total potential and kinetic energy of all the microscopic particles in an object make up its <span>B. thermal energy. </span>
7 0
3 years ago
Read 2 more answers
1.
zubka84 [21]

Answer:

D

Explanation:

Momentum= mass x speed (P=MV)

Momentum= 5x6=30

Momentum= 30kg m/s

7 0
2 years ago
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