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Sunny_sXe [5.5K]
3 years ago
14

How can humans use their knowledge of changing states of matter to better society? (ex. A human can harness the thermal energy f

rom transitioning water from a liquid state to a gas state.)
Please Hurry This assignment is due tonight.
Write 5 sentences why. Thanks
Physics
1 answer:
MissTica3 years ago
8 0

Answer:

Anything that has mass is made up of matter – an all-encompassing word for atoms and molecules that make up our physical world. We describe this matter as existing in states (sometimes referred to as phases). Most people are familiar with three states of matter – solids, liquids and gases – but there are two more that are less commonly known but just as important – plasmas and Bose-Einstein condensates

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8. You push downward on a box with a force of 750 N. The box is on a flat horizontal surface for which the coefficient of static
natima [27]

Answer:

The mass of the heaviest box you will be able to move with this applied force = 61.4 kg

Explanation:

From the diagram attached, the forces acting on the box include the weight of the box, applied force on the box, normal reaction of the surface on the box and the Frictional force in the opposite direction to the applied force.

For the box to be able to move, the applied force must have a horizontal component that at least matches the Frictional force between the box and the surface. This is the force balance in the horizontal direction.

Resolving the applied force into horizontal and vertical components,

Fₓ = 750 cos 25° = 679.73 N

Fᵧ = 750 sin 25° = 316.96 N

Doing a force balance in the vertical axis,

N = (mg + 316.96)

Frictional force = μN = μ (mg + 316.96)

μ = 0.74, g = 9.8 m/s²

Frictional force = Fᵧ

μ (mg + 316.96) = 679.73

0.74(9.8m + 316.96) = 679.73

7.252m + 234.5504 = 679.73

7.252m = 679.73 - 234.5504 = 445.1796

m = (445.1796/7.252)

m = 61.4 kg

Hope this Helps!!!

6 0
3 years ago
True or false Carbon in the form of carbon dioxide is needed for both processes of photosynthesis and cellular respiration True
Anna007 [38]

Yes carbon dioxide is needed for photosynthesis while cellular respiration needs oxygen and dispurses carbon dioxide

5 0
3 years ago
A 74-kg boy is surfing and catches a wave which gives him an initial speed of 1.6 m/s. He then drops through a height of 1.56 m,
Reptile [31]

Answer:

Work done, W = 1.44 kJ

Explanation:

Given that,

Mass of boy, m = 74 kg

Initial speed of boy, u = 1.6 m/s

The boy then drops through a height of 1.56 m

Final speed of boy, v = 8.5 m/s

To find,

Non-conservative work was done on the boy.

Solution,

The work done by the non conservative forces is equal to the sum of total change in kinetic energy and total change in potential energy.

W=\dfrac{1}{2}m(v^2-u^2)+(0-mgh)

W=\dfrac{1}{2}m(v^2-u^2)-mgh

W=\dfrac{1}{2}\times 74\times (8.5^2-1.6^2)-74\times 9.8\times 1.56

W = 1447.21 Joules

or

W = 1.44 kJ

Therefore, the non conservative work done on the boy is 1.44 kJ.

4 0
3 years ago
Puedo violar a mi hermana?
Trava [24]
Interesante muy interesante

Pero no que estás diciendo???
6 0
3 years ago
2 QUESTIONS HELP PLZ...:/
algol [13]
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