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3 years ago

Conductors offer very little resistance to the flow of electrical current

1 answer:

5 0

Materials that have low resistance to electric current are called electric conductors. Many metals - including copper, aluminum, and steel are good conductors of electricity. The outer electrons of metal atoms are loosely bound and free to move, allowing electric current to flow

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A cannonball is launched from the ground at an angle of 30 degrees above the horizontal and a speed of 30 m/s. Ideally (no air r

marusya05 [52]

As we know that here no air resistance while ball is moving in air

So here we will say that

initial total energy = final total energy

$KE_i + U_i = KE_f + U_f$

here we know that

$Ui = U_f = 0$ (as it will be on ground at initial and final position)

so we will say

$KE_i = KE_f$

since mass is always conserved

so we will say that final speed of the ball must be equal to the initial speed of the ball

so we have

$v_f = v_i = 30 m/s$

6 0

3 years ago

Read 2 more answers

What should be the speed of an artificial satellite moving on a circular orbit around the Earth at a distance of 400 km from the

Drupady [299]

Answer:

7.67001846 km/s or 17157.38529 mph

Explanation:

G = Gravitational constant = 6.67 × 10⁻¹¹ m³/kgs²

M = Mass of the Earth = 5.972 × 10²⁴ kg

m = Mass of satellite

v = Velocity of satellite

The distance between the Earth's center and the satellite is

r = 6371000+400000 = 6771000 m

As the centripetal force balances the force of gravity we have

$\frac{mv^2}{r}=\frac{GMm}{r^2}\\\Rightarrow v=\sqrt{\frac{GM}{r}}\\\Rightarrow v=\sqrt{\frac{6.67\times 10^{-11}\times 5.972\times 10^{24}}{6771000}}\\\Rightarrow v=7670.01846\ m/s=7.67001846\ km/s$

Converting to mph

$7670.01846\times \frac{3600}{1609.34}=17157.38529\ mph$

The velocity of the satellite is 7.67001846 km/s or 17157.38529 mph

5 0

3 years ago

What is the difference between 5 mL of water and 5.0 mL of water?

ad-work [718]

There is no difference. 5 is the same as 5.0

6 0

3 years ago

A 1.5m wire carries a 7 A current when a potential difference of 63 V is applied. What is the resistance of the wire? ohms

zheka24 [161]

To find the resistance, the formula you need to use is
$r = \frac{v}{i}$
whereby i reprsents the current and v represents the potential difference.
therefore,
r=63/7
r=9 ohms

3 0

3 years ago

Name means near thyroid

fredd [130]

Answer:

parathyroid hormone

Explanation:

7 0

3 years ago