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solmaris [256]
3 years ago
10

1.What is a force? What changes can be produced by a force?(AS)​

Physics
1 answer:
frutty [35]3 years ago
7 0

Answer:

the pull or push which changes or tends to change the position of an object from rest to motion or motion to rest is called force.

Changes of force that can be produced:

  1. Force can change the shape of a body.
  2. Force can change the position of a body.
  3. Force can stop the moving body.
  4. Force can change the speed of a moving body.
  5. Force can change the direction of a moving body.
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GrogVix [38]
Yeah i think with a car or a plane:)
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Chemical weathering in a sentence
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The rock had to have undergone chemical weathering due to its change in mineralogical and chemical composition of the rock. Or Chemical weathering is when the acid from rain starts to burn through rocks and damage them
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In order to cool 1 ton of water at 20°C in an insulated tank, a person pours 140 kg of ice at –5°C into the water. The specific
salantis [7]

Answer:

T = 6.31 ^0 C

Explanation:

1 ton = 907.2 kg

so here heat given by water = heat absorbed by the ice

so by energy balance we will have

Q_1 = Q_2

mL + ms\Delta T_1 + ms\Delta T_2 = ms\Delta T_3

so we have

140(2.11)(5) + 140(333.7) + 140(4.18)(T) = 907.2(4.18)(20 - T)

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T = \frac{27646.92}{4377.3}

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7 0
3 years ago
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5 0
3 years ago
2 76 Consider a household that uses 14,000 kWh of elec- (tricity per year and 3400 L of fuel oil during a heating sea- son. The
NNADVOKAT [17]

Answer:

The total amount of CO₂ produced will be  = 20680 kg/year

The reduction in the amount of CO₂ emissions by that household per year = 3102 kg/year

Explanation:

Given:

Power used by household = 14000 kWh

Fuel oil used = 3400 L

CO₂ produced of fuel oil = 3.2 kg/L

CO₂ produced of electricity = 0.70 kg/kWh

Now, the total amount of CO₂ produced will be = (14000 kWh × 0.70 kg/kWh) + (3400 L × 3.2 kg/L)

⇒ The total amount of CO₂ produced will be = 9800 + 10880 = 20680 kg/year

Now,

if the usage of electricity and fuel oil is reduced by 15%, the reduction in the amount of the CO₂ emission will be = 0.15 × 20680 kg/year = 3102 kg/year

6 0
4 years ago
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