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ycow [4]
3 years ago
11

What is the tendency of a material to oppose the flow of charge?

Physics
2 answers:
Salsk061 [2.6K]3 years ago
6 0
The answer is B. resistance
shtirl [24]3 years ago
5 0

Answer: Resistance

Explanation:

The tendency of a material to oppose flow of charges through it is known as resistance. It is an opposing force that acts against the electric current. It depends on the resistivity of the material, its length and diameter. It also depends on the temperature. With increase in temperature, resistance increases.

R = \frac{\rho l}{A}

It is measured in Ohms (Ω)

At constant voltage,

I \propto \frac{1}{R}

Thus, more resistance leads to low current value.

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A 35 N force makes a 10 degree angle with the positive x-axis. What is the magnitude of the vertical component of the force?
Snowcat [4.5K]

Answer:

6.07 N

Explanation:

Given that,

Force, F = 35 N

It makes 10 degree angle with the positive x-axis.

We need to find the magnitude of the vertical component of the force. It can be given by :

F_y=F\sin\theta\\\\=35\times \sin(10)\\\\=6.07\ N

So, the magnitude of the vertical component of the force is 6.07 N.

5 0
3 years ago
Read 2 more answers
Paheli observed the shadow of a tree at 8:00 a.m., 12:00 noon
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3 years ago
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Consider a container of oxygen gas at a temperature of 23°C that is 1.00 m tall. Compare the gravitational potential energy of a
Sergio039 [100]

Answer:

Yes, it is reasonable to neglect it.

Explanation:

Hello,

In this case, a single molecule of oxygen weights 32 g (diatomic oxygen) thus, the mass of kilograms is (consider Avogadro's number):

m=1molec*\frac{1mol}{6.022x10^{23}molec} *\frac{32g}{1mol}*\frac{1kg}{1000g}=5.31x10^{-26}kg

After that, we compute the potential energy 1.00 m above the reference point:

U=mhg=5.31x10^{-26}kg*1.00m*9.8\frac{m}{s^2}=5.2x10^{-25}J

Then, we compute the average kinetic energy at the specified temperature:

K=\frac{3}{2}\frac{R}{Na}T

Whereas N_A stands for the Avogadro's number for which we have:

K=\frac{3}{2} \frac{8.314\frac{J}{mol*K}}{6.022x10^{23}/mol}*(23+273)K\\ \\K=6.13x10^{-21}J

In such a way, since the average kinetic energy energy is about 12000 times higher than the potential energy, it turns out reasonable to neglect the potential energy.

Regards.

8 0
3 years ago
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5 0
3 years ago
Please help me feel in the blanks Giving 30 points
maw [93]

4:chemical properties can only be observed when a substance changes into another substance.

5: physical properties such as color and shape are easy to observe

6: in a chemical change an altered substance forms

7: cooking or baking food will result in a chemical change

8: a melting ice cube is a physical change

9: the rusting of iron is a chemical change

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7 0
3 years ago
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