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FrozenT [24]
3 years ago
9

5. Why are ceramics and plastics good insulators?

Physics
1 answer:
jeka57 [31]3 years ago
3 0

Answer:

Here

Explanation:

They don't have free electrons moving around (delocalised electrons) so they can't conduct heat and electricity which gives them a property of good insulators. The insulators stop us having an electric shock because they don't conduct electricity as we use them to insulate metal wires and other metallic things. can i have brainliest now pls!

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Please help /Show work
Ne4ueva [31]
The picture shows all of my work:)

8 0
3 years ago
A forces of 5 N accelerates an object. The object’s mass is 50 g. What is the acceleration of the object? (Formula: F=ma)
Harrizon [31]

Answer:

100 m / s^

F =ma from this divided F and ma by m to get acceleration

a = F / m

a = ?

F = 5 N

m = 50 g = 0. 0 5 kg ; if 1 kg = 1000g how much kg of 50 g by criss cross method we get 0.05 kg

so; 5N / 0. 05 kg = 5kg m / s^ / 0.05 kg

kg cancel by kg

the result is 100 m/ s^

7 0
2 years ago
When the displacement in SHM is equal to 1/2 of the amplitude xm, what fraction of the total energy is (a) kinetic energy and (b
nikitadnepr [17]

Answer:

Explanation:

Let x₀ be the amplitude , ω be the angular velocity

velocity at displacement  x ,

v = ω \sqrt{(x_0^2-x^2)}

at x =\frac{x_0}{2}

v = ω [ \sqrt{(x_0^2-\frac{x_0}{4} ^2)}

v² =  ω² x\frac{3x_0^2}{4}

1/2 m v²

= 3/8 m x ω²x₀²

Total energy = 1/2 m ω²x₀²

Kinetic energy as fraction of total energy

= 3/8 m x ω²x₀² x 2 /  m ω²x₀²

= 3 / 4

Fraction of potential energy

= 1 - 3/4

1/4

c )

Half kinetic = half potential energy

=  1/4 m ω²x₀²

1/2 m ω²( x₀²- x ² )

x₀²/2  = x₀²- x ²

x² = x₀²/2

x = x₀/√2

3 0
3 years ago
Consider the moon rocks that the crew of Apollo 11 brought back from Mare Tranquillitatis. Within the zircon crystals within the
NikAS [45]

Answer:

2.9 billion years

Explanation:

6 0
3 years ago
Convert the value of g=9.8m/s^2 into km/hr^2​
jek_recluse [69]

Answer:

35.28km/hr

Explanation:

8 0
3 years ago
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