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Natasha2012 [34]
3 years ago
7

Please Help! Multiple Choice!

Physics
1 answer:
attashe74 [19]3 years ago
8 0
Option A 3......
... ........
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1.)Describe an experience where you encountered a buoyant force and tell what it felt like.
kap26 [50]

Swimming: Knowing I would not sink made feel safe.

Taking off in an aircraft: I felt heavier.

<u>Explanation:</u>

The buoyant force originates from the weight applied to the item by the liquid. Since the weight increments as the profundity press, the base of an article are constantly bigger than the power on the top - consequently the net upward power.

It follows up on an article inverse to gravity by liquid which is being submerged mostly or totally in the liquid. It contradicts the heaviness of the item. The buoyant force is given by volume dislodged by an item into the thickness of liquid into gravitational quickening.

8 0
3 years ago
Which property is useful for describing a substance might depend on the state of matter the substance is in?
Sliva [168]
The amount of energy in molecules of matter determines the state of matter. Matter can exist in one of several different states, including a gas, liquid, or solid state.
7 0
3 years ago
Read 2 more answers
A coffee-cup calorimeter is used to determine the heat of reaction for the reaction of compound A with compound B. A(aq) + B(aq)
Sergeeva-Olga [200]

Answer:

\rm 1.64\times 10^{3}\; J.

Explanation:

Assume that his calorimeter is sufficiently effective, such that no heat had escaped to the surroundings. Heat from this solution would be absorbed by either

  • the solution, or
  • the coffee cup.

Temperature change: 33.637 - 23.722 = \rm 9.915\; ^\circ C.

<h3>Heat absorbed by the solution:</h3>

Only the specific heat capacity (per unit mass) of the solution is given. Both the mass of the solution and the temperature change will be required for determining the energy change. Start by finding the mass of the solution.

m = \rho \cdot V = 2\times 16.10 \times 1.00 = \rm 32.10\; g.

Calculate the amount of heat absorbed from the specific heat:

Q = c\cdot m \cdot \Delta T = 4.814\times 32.10 \times 9.915 = \rm 1335.80\; J.

<h3>Heat absorbed by the coffee cup:</h3>

The heat capacity of the coffee cup is given. Only the temperature change will be required for finding the amount of heat absorbed.

Q = C\cdot \Delta T = \rm 30.7\times 9.915 = 304.391\; J.

<h3>Heat that this reaction produces</h3>

Find the sum of the two parts of heat. Round to three significant figures as in the heat capacity of the coffee cup and the density of the solution.

\rm 1335.80+ 304.391 = 1.64\times 10^{3}\; J.

8 0
4 years ago
Stars do not exist as separate entities in space, but instead belong to large groups of other stars that are held together by th
vlabodo [156]
I think the answer to your question is a galaxy. 
8 0
3 years ago
Converting 16.2 pounds to 1 newton
laiz [17]

16.2 pounds doesn't convert to 1 newton.
It converts to about  71.1 newtons

1 pound force is the same force as  4.448... newtons (rounded).

7 0
3 years ago
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