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3 years ago

How does electrical conduction compare between metals, nonmetals, and metalloids

Physics

1 answer:

zhuklara [117]3 years ago

4 0

Answer:

metal> metalloids >nonmetals (Electrical conductivity)

Explanation:

Electrical conductivity of objects can be compared by the bonding energy of electrons in them.

Metals have less bonding energy of electrons, so even at room temperature their are significant number of free electrons to carry electrical current.

Nonmetals have a very high bonding energy of electrons, so at room temperature negligible number of free electrons are present so electrical conductivity is very low.

Metalloids have both metallic and non metallic features. The electron bonding energy falls in between that of metals and nonmetals. So electrical conductivity also lies in between metals and nonmetals.

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A proton, traveling with a velocity of 4.6 × 106 m/s due east, experiences a magnetic force that has a maximum magnitude of 6.0

Kobotan [32]

Answer:

$B = 0.0815 T$

since the direction of force is along south so the magnetic field must be upwards

Explanation:

Force on moving charge in magnetic field is given as

$F = q(\vec v \times \vec B)$

here we know this is force on proton

so we have

$q = 1.6 \times 10^{-19} C$

$F = 6.0 \times 10^{-14} (-\hat j) N$

also we know that the velocity of charge is

$v = 4.6 \times 10^6 \hat i m/s$

now from above formula we have

$(6.0 \times 10^{-14}) = (1.6 \times 10^{-19})(4.6 \times 10^6)B$

$B = 0.0815 T$

since the direction of force is along south so the magnetic field must be upwards

6 0

4 years ago

A 10-kg object is dropped from rest. after falling a distance of 50 m, it has a speed of 26 m/s. what is the change in mechanica

likoan [24]

The change in mechanical energy caused by the dissipative resistance force is equal to, difference between the potential energy and kinetic energy of the object.

Potential energy of the object, P.E = mgh

m is mass of the object = 10 kg

g is acceleration due to gravity = 9.8 m/s²

h= height from which it is dropped =50 m

Substituting the value we get,

P.E = 10×9.8×50 = 4900 J

Kinetic energy of the object, K.E = $\frac{1}{2}mv^{2}$

v is the velocity of the object = 26 m/s²

K.E = (1/2)×10×(26)²

= 3380 J

Change in mechanical energy caused by dissipative force = P.E ₋ K.E

= 4900 ₋ 3380 = 1520 J

4 0

3 years ago

What is the best definition of ETS reactions

Licemer1 [7]

C. A set of reactions that is the primary route of ATP production in cells.

6 0

4 years ago

Read 2 more answers

The first Leyden jar was probably discovered by a German clerk named E. Georg von Kleist. Because von Kleist was not a scientist

skelet666 [1.2K]

Answer:

a) q = 4.47 10⁻⁵ C

b) ΔV = 4.47 10⁴ V

Explanation:

A Leyden bottle works as a condenser that accumulates electrical charge, so we can use the formula of the energy stored in a capacitor

U = Q² / 2C

Q = √ (2UC)

let's reduce the magnitudes to the SI system

c = 1 nF = 1 10⁻⁹ F

let's calculate

q = √ (2 1 10⁻⁹-9)

q = 0.447 10⁻⁴ C

q = 4.47 10⁻⁵ C

b) for the potential difference we use

C = Q / ΔV

ΔV = Q / C

ΔV = 4.47 10⁻⁵ / 1 10⁻⁹

ΔV = 4.47 10⁴ V

8 0

3 years ago

What type of relationship exists between the length of a wire and the resistance, if all other factors remain the same?

jek_recluse [69]

Resistance of the wire can be calculated using the following rule:
R = (ρ*L) / A
where:
R is the resistance
ρ is the resistivity of the material of the wire
L is the length of the wire
A is the area of the wire

From the above relation, we can deduce that:
The resistance of the wire is directly proportional to its length assuming all other factors are constant

7 0

3 years ago