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3 years ago

WILL GIVE BRAINLIEST!

Physics

2 answers:

ASHA 777 [7]3 years ago

5 0

Answer:

A: sublimation

B: vaporization

C: melting

Explanation:

Bad White [126]3 years ago

3 0

Answer:

A. Deposition

B. Condensation

C. Freezing

Explanation:

We have three changes of state shown in the picture:

- Deposition: it is the change of state of a substance from gas to solid state, without going through the liquid phase. In this process, energy is released, as the average energy of the molecules of the substance decrease, releasing it to the surroundings.

- Condensation: it is the change of state of a substance from gas to liquid state. In this process, energy is also released, as the average energy of the molecules of the substance decrease as the substance becomes a liquid, releasing it to the surroundings.

- Freezing: it is the change of state of a substance from liquid to solid state. In this process, energy is also released, as the average energy of the molecules of the substance decrease as the substance becomes a solid, releasing it to the surroundings.

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A 3 kg mass object is pushed 0.6 m into a spring with spring constant 210 N/m on a frictionless horizontal surface. Upon release

Svetradugi [14.3K]

Answer with Explanation:

We are given that

Mass of spring,m=3 kg

Distance moved by object,d=0.6 m

Spring constant,k=210N/m

Height,h=1.5 m

a.Work done to compress the spring initially= $\frac{1}{2}kx^2=\frac{1}{2}(210)(0.6)^2=37.8J$

By conservation law of energy

Initial energy of spring=Kinetic energy of object

$37.8=\frac{1}{2}(3)v^2$

$v^2=\frac{37.8\times 2}{3}$

$v=\sqrt{\frac{37.8\times 2}{3}}$

v=5.02 m/s

c.Work done by friction on the incline, $w_{friction}=P.E-spring \;energy$

$W_{friction}=3\times 9.8\times 1.5-37.8=6.3 J$

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3 years ago

A Sodium ion has a positive charge because it has

kolbaska11 [484]

Answer:

This is because the 11 positive protons and 10 negative electrons end up with an overall charge of +1.

Explanation:

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3 years ago

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The tactile system is actually made up of two distinct skin senses.

Ludmilka [50]

The tactile system is actually made up of two distinct skin senses; protective and the discriminative system. The function of the protective system is to alert us to harmful stimuli. The receptors of the system are the hairs of our skin, head and genitals. The discriminative system is to show us what we are touching, where on our bodies is touching us and what are touching us. The receptors for his system are the hands, fingers, soles of feet and mouth and tongue.

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2 years ago

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In the Biomedical and Physical Sciences building at MSU there are 135 steps from the ground floor to the sixth floor. Each step

satela [25.4K]

Answer:

W = 16.5 Kj

P = 49.9 Watt

E = 16471

Explanation:

m = 73.5kg

t = 5min 30sec = (5×60) + 30 = 330sec

each step = 16.6cm = 0.166m

h = 135×0.166 = 22.41 m

g = 10 m/s²

(i) W = F × s = W × h = mgh

W = 73.5×10×22.41 = 16471.35

W = 16.5 Kj

(ii) Power = workdone/time

P = 16471.35/330

P = 49.9 Watt

(iii) The energy burnt in this process = 16471

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3 years ago

2. Which animal is a primary consumer in the Ethiopian Highlands?

Morgarella [4.7K]

Answer:

the walia ibex

Explanation:

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