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3 years ago

8

When energy is transformed, some is wasted. What is a common form of wasted energy in some energy transformations? (Think about

inefficient light bulbs or car engines)

1 answer:

tresset_1 [31]3 years ago

4 0

Answer:

Eletrical

Explanation:

The electric transfers 70% of the input energy to kinetic energy 30% is wasted output energy in the form of thermal energy and sound.

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Find the mass of an object on earth if its weight is 100N

Kaylis [27]

Answer:

0.19 kg

8 N

1.964 N

58.86 N

15 kg

Explanation:

w = Weight of an object = 100 N

g = Acceleration due to gravity of Earth = $9.81\ \text{m/s}^2$

m = Mass of an object

Weight is given by

$w=mg\\\Rightarrow m=\dfrac{w}{g}\\\Rightarrow m=\dfrac{100}{9.81}\\\Rightarrow m=10.19\ \text{kg}$

Mass of the object is 0.19 kg

g = $2\ \text{m/s}^2$

m = 4 kg

$w=mg\\\Rightarrow w=4\times 2\\\Rightarrow w=8\ \text{N}$

Weight of the object is 8 N.

m = 200 g

$w=mg\\\Rightarrow w=0.2\times 9.81\\\Rightarrow w=1.964\ \text{N}$

Weight of the object is 1.964 N.

Weight is the force the Earth exerts on an object which is on the surface of the Earth.

m = 6kg

$w=mg\\\Rightarrow w=6\times 9.81\\\Rightarrow w=58.86\ \text{N}$

The force of the object is 58.86 N.

w = 150 N

a = g = $10\ \text{m/s}^2$

$m=\dfrac{w}{g}\\\Rightarrow m=\dfrac{150}{10}\\\Rightarrow m=15\ \text{kg}$

Mass of the object is 15 kg.

7 0

3 years ago

Give the number of significant figures in this number: 40

lubasha [3.4K]

The # 4 is the only significant # in 400.. Trailing 0's r not significant unless there is a decimal.

in 0.7000, there are 4 significant #'s.

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What is the mass number of lithium isotope that consists of 3 protons, 4 neutron and 3 electrons

sweet-ann [11.9K]

Answer:

7. ok

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3 years ago

Using the table on the right, complete each calculation by typing in the correct answer.

Pavel [41]

Answer:

13,200 mL

Explanation:

multiply by 1000 to go from L to mL

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Matter can be measured in many ways for specific purposes which measurement depends on the force of gravity and is not a reliabl

dlinn [17]

Answer:True But matter can take up much space and is stronger than density and gravity

Explanation: Gravity is like a force that just pull on objects now if you get down to the magnets well magnetism is the strongest force on earth that could be connected through the core

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