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Anvisha [2.4K]
3 years ago
6

Which term describes a substance that has a low melting point and poor electrical conductivity?

Physics
1 answer:
densk [106]3 years ago
4 0

Answer:Simple Covalent substance

Explanation:Simple covalent substance describes a substance that has a low melting point and poor electrical conductivity because:

(1)melting point :For the covalent bond and intermolecular force that are present in a simple covalent substance,energy is needed to break the forces of attraction present. In the simple covalent substance, little energy is needed because the intermolecular forces present are broken because they are weaker compared to the covalent bond present.

Therefore, when simple covalent substance melts,only the intermolecular forces are broken leaving only the covalent bond in the substance.

(2) poor conductivity: for a substance to conduct electricity,it must have charged particles which are free to move to and fro.

But in the simple covalent substance,there are no charged particles that can be separated due to the covalent bond present in simple covalent substance.

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Answer:

0.159

Explanation:

the formula to find its is 1÷2*gt^2

5 0
1 year ago
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The displacement (in centimeters) of a particle moving back and forth along a straight line is given by the equation of motion s
Veseljchak [2.6K]

Answer:

v_{avg} = 0

Explanation:

The object is moving to and fro about its mean position

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s = 5 sin(\pi t) + 5 cos(\pi t)

now in one complete time period we know that the the object will complete its one oscillation

So the change in the position of the object in one complete time period will be ZERO

so here we can say that

v_{avg} = \frac{displacement}{time}

since change in position is zero

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4 0
3 years ago
Hydraulic brakes use Pascal’s principle. The driver exerts a force of 100 N on the brake pedal. This force is increased by the s
Rus_ich [418]

Answer:

Explanation:

Pascal's law states that when there is an increase in pressure at any point in a confined fluid, the pressure is equally distributed at every other point in the container.

The formulas that relate to this are given below:

P1 = P2 (since the pressures are equal throughout).

P2 is the pressure transmitted in the hydraulic system

N.B : P= Force/ Area

Therefore we have  

F1/A1 = P2

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A nonlinear spring is used to launch a toy car. The car is pushed against the spring, compressing the spring 2.5 cm. The force t
dybincka [34]

Answer:

1.56 J

Explanation:

given,

Spring compression, x = 2.5 cm

Force exerts by the spring,

F = - k x

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PE = \dfrac{1}{2}kx^2

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Think about the electricity sent to your home from a power plant. How does the voltage of the electricity that leaves the plant
creativ13 [48]

Answer:

C) High voltage to low voltage

Explanation:

At a power plant, there is a production of electricity at a high voltage compared to the voltage provided to our home.

Voltage of about 12 KV is produced by power plant which is then converted into about 400 KV or greater (depending upon the countries) to transfer electricity from power plant to city Grid station using Step-up transformer. At City Grid station, Step-down transformer is used to convert high voltage (about 400 KV) to low voltage (about 13 KV) to transfer electricity from grid station to the city. Then this low voltage (about 13 KV) again converted to 220 V using Step-down transformer for household usage. So, overall  about 12 KV voltage at power plant is converted into 220 V for household usage using step-up and step-down transformer at different stages.

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