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White raven [17]

3 years ago

12

How does the carbon rod of a cell beomes a positiveterminal?

1 answer:

ivann1987 [24]3 years ago

7 0

Answer:

In the middle of a dry cell, is a rod made of carbon. Around the carbon rod is a chemical paste. At the same time, the carbon rod becomes positively charged. When this happens, electrical current flows out of the cell when a conductor is attached between the cell's positive and negative terminals.

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Scientific theories are deductive in nature.?

dolphi86 [110]

Answer:

deductive reasoning usually follows steps .

That is, how we predict what the observations should be if the theory were correct

8 0

3 years ago

The formula v = √2.5r models the maximum safe speed, v, in miles per hour, at which a car can travel on a curved road with radiu

mel-nik [20]

Answer:

The maximum safe speed of the car is 30.82 m/s.

Explanation:

It is given that,

The formula that models the maximum safe speed, v, in miles per hour, at which a car can travel on a curved road with radius of curvature r r, is in feet is given by :

$v=\sqrt{2.5\ r}$ .........(1)

A highway crew measures the radius of curvature at an exit ramp on a highway as 380 feet, r = 380 feet

Put the value of r in equation (1) as :

$v=\sqrt{2.5\ \times 380}$

v = 30.82 m/s

So, the maximum safe speed of the car is 30.82 m/s. Hence, this is the required solution.

4 0

3 years ago

A charge of -8.1 µC is traveling at a speed of 7.2 106 m/s in a region of space where there is a magnetic field. The angle betwe

Sergeeva-Olga [200]

Answer:

$B = 1.03 \times 10^{-4} T$

Explanation:

As we know that magnetic force on a moving charge is given by the formula

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

so we will have

$F = qvBsin\theta$

now we will have

$F = 4.6 \times 10^{-3} N$

$q = 8.1 \mu C$

$\theta = 50^o$

$v = 7.2 \times 10^6 m/s$

now we have

$4.6 \times 10^{-3} = (8.1 \times 10^{-6})(7.2 \times 10^6)Bsin50$

$B = 1.03 \times 10^{-4} T$

7 0

3 years ago

Potential energy can transform into kinetic energy and vice versa so the total energy stay the same (reflect on the skateboard s

marysya [2.9K]

I think it’s true, but I’m not quite sure

5 0

3 years ago

A sensational 130 kg midfielder has 695 J of

antoniya [11.8K]

Answer:

v = 3.27 m/s

Explanation:

KE = 1/2 mv^2

695 J = 1/2 (130kg)(v^2)

695 J / (1/2 x 130kg) = v^2

v^2 = square root of 10.69

v = 3.27 m/s

4 0

3 years ago