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Salsk061 [2.6K]
3 years ago
10

Which statement is true regarding copper's ability to conduct electricity?

Physics
2 answers:
zhenek [66]3 years ago
7 0
<span>Copper is a good conductor of electricity because its atoms have a loosely held electron in their outer shell that is able to move freely to other atoms.</span>
Rasek [7]3 years ago
5 0

Answer:

(i) Copper is a good conductor of electricity because its atoms have a loosely held electron in their outer shell that is able to move freely to other atoms.

Explanation:

Copper atoms has loosely held electrons in their outer shell. These electrons are not permanently associated with the copper atoms, instead They make a cloud around the outside of these atoms and are able to move freely and quickly through the solid.  

Option (ii) cannot be selected because copper is a good conductor. For the conductivity, free movement of electrons is a condition which is unsatisfied in the (iii). In (iv), it is given that copper has 1 electron in the outermost shell which can flow to the other copper atoms which is not true because in copper many atoms can flow to other atoms.

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Suppose a 1300 kg car is traveling around a circular curve in a road at a constant
Scrat [10]

Answer:

F = 4212 N

Explanation:

Given that,

Mass of a car, m = 1300 kg

Speed of car on the road is 9 m/s

Radius of curve, r = 25 m

We need to find the magnitude of the unbalanced force that steers the car out of its natural straight-  line path. The force is called centripetal force. It can be given by :

F=\dfrac{mv^2}{r}\\\\F=\dfrac{1300\times 9^2}{25}\\\\F=4212\ N

So, the force has a magnitude of 4212 N

4 0
3 years ago
A uniform log of length L is inclined 30° from the horizontal when supported by a frictionless rock located 0.6L from its left e
mafiozo [28]

Answer:

x = 0.974 L

Explanation:

given,

length of inclination of log = 30°

mass of log = 200 Kg

rock is located at = 0.6 L

L is the length of the log

mass of engineer = 53.5 Kg

let x be the distance from left at which log is horizontal.

For log to be horizontal system should be in equilibrium

 ∑ M = 0

mass of the log will be concentrated at the center  

distance of rock from CM of log = 0.1 L

now,

∑ M = 0

m_{log} g \times 0.1 L = m_{engineer} g \times (x - 0.6 L)

200 \times 0.1 L = 53.5 \times (x - 0.6 L)

0.374 L =x - 0.6 L

       x = 0.974 L

hence, distance of the engineer from the left side is equal to x = 0.974 L

7 0
3 years ago
What angle will give you the maximum range (horizontal displacementon a projectile? ( 3 pts)
natulia [17]

Answer:

45 degrees

Explanation:

The textbooks say that the maximum range for projectile motion (with no air resistance) is 45 degrees.

8 0
2 years ago
A new ride being built at an amusement park includes a vertical drop of 71.6 meters. Starting from rest, the ride vertically dro
Allisa [31]

Answer: 2.6x107

Explanation:

3 0
3 years ago
Please help on this one? The mass on the spring in this diagram is in harmonic motion between x = -5cm and x=5cm
shutvik [7]

c ... max speed zero accel

8 0
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