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____ [38]
3 years ago
12

1. List five exothermic reactions that are going on around you. (10 points)

Physics
1 answer:
KonstantinChe [14]3 years ago
5 0

Answer :

Exothermic reactions are those reactions in which a system releases its heat energy to surroundings whereas during endothermic reactions a system absorbs heat energy from surroundings.

Explanation :

Five exothermic reactions that are going on around us

a) Making of ice cubes

b) Rusting of iron

c) Nuclear fission reaction

d) Cellular respiration

e) Condensation of water vapor to form rain.

Following are some endothermic reactions;

1) Photosynthesis  6CO_{2}+12H_{2}O\xrightarrow[sunlight]{chlorophyll}C_{6}H_{12}O_{6}+6H_{2}O+6O_{2}

2) Mixing of water in Ammonium Nitrate NH_{4}NO_{3}(s)\overset{H_{2}O(l)}{\rightarrow}NH^{_{3}(aq)}+H_{3}O^{+}

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For the first challenge, Lex demands that Superman use the weight of a small stone to lift a boulder. Understanding the principl
Nitella [24]

Pascal's law states that the pressure exerted on an incompressible fluid and in equilibrium within a container of non-deformable walls is transmitted with equal intensity in all directions and at all points of the fluid. In other words, it could be summed up further, stating that any pressure exerted on a fluid will spread over the entire substance evenly.

When Superman puts the stone on one side of the hydraulic system, the weight of the stone creates a pressure on the fluid that ends up being transmitted to lift the piston attached to the large stone. In order for the law of conservation of energy to exist and be maintained, the small stone has to move a lot so that the large stone moves only slightly, but moves safely.

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3 years ago
PHYSICAL SCIENCE: What are some methods used to control the types and sources of pollution?
irina [24]

Gaseous emissions are industrial products such as sulfur dioxide, carbon monoxide, and oxides of nitrogen also released during various manufacturing operations. Particulate control. Methods for particulate control tend to operate on a common principle.

3 0
3 years ago
A car with a mass of 1,400 kg is traveling at a speed of 40 m/s. What is its momentum?
adell [148]

Answer:

The answer is

<h2>56,000 kgm/s</h2>

Explanation:

The momentum of an object can be found by using the formula

<h3>momentum = mass × velocity</h3>

From the question

m = 1400 kg

v = 40 m/s

We have

momentum = 1400 × 40

We have the final answer as

<h3>56,000 kgm/s</h3>

Hope this helps you

7 0
3 years ago
Two boxes on opposite ends of a massless board that is 3.0 m long. The board is supported in the middle by a fulcrum. The box on
rosijanka [135]

Answer:

b. 1.1 m

Explanation:

It is given that the total distance between the masses is equal to the length of the board, which is 3 m. Therefore,

s_{1} + s_{2} = 3\ m\\\\s_{2} = 3\ m - s_{1}\ --------- eqn(1)

where,

s₁ = distance of fulcrum from left mass

s₂ = distance of fulcrum from right mass

In order to achieve balance, the torque due to both masses must be equal:

T_{1} = T_{2}\\m_{1}s_{1} = m_{2}s_{2}\\(25\ kg)(s_{1}) = (15\ kg)(s_{2})\\\\\frac{15\ kg}{25\ kg}(s_{2}) = s_{1}\\\\using\ eqn(1):\\(0.6)(3\ m - s_{1}) = s_{1}\\1.8\ m = 1.6\ s_{1}\\s_{1} = \frac{1.8\ m}{1.6}

s₁ = 1.1 m

Hence, the correct option is:

<u>b. 1.1 m</u>

4 0
3 years ago
Water flows at 10 m/s through a pipe with radius 0.025 m. The pipe goes up to the second floor of the building, 2.5 m higher, an
Lera25 [3.4K]

Answer: from the information given, the velocity of the water will decrease but the pipe size will remain the same.

This can be proved with bernoulli's equation.

Explanation: careful analysis of the system using bernoulli's equation of flow is shown in the image attached

5 0
3 years ago
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