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3 years ago

HELP FAST What is voltage, and what is its relationship to amperage and power? (10 points)

Physics

1 answer:

Amanda [17]3 years ago

6 0

Answer:

Amperage is the rate of electrical charge per time.

1 amp = 1 coulomb / second

Power is the product of amperage and voltage.

P = IV

Explanation:

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Ladybug walks 10 cm forward and 5 cm backwards in 20 seconds what is the average speed of ladybug what is the average velocity

lbvjy [14]

Answer:

Average speed = 0.0075 m/s

Average velocity = 0.0025 m/s along forward direction

Explanation:

Speed is the ratio of distance and time and velocity is the ratio of displacement and time.

Distance traveled = 10 + 5 = 15 cm = 0.15 m

Displacement = 10 - 5 = 5 cm = 0.05 m

Time = 20 seconds

$\texttt{Average speed = }\frac{\texttt{Distance}}{\texttt{Time}}\\\\\texttt{Average speed = }\frac{0.15}{20}=7.5\times 10^{-3}m/s\\\\\texttt{Average velocity = }\frac{\texttt{Displacement}}{\texttt{Time}}\\\\\texttt{Average velocity = }\frac{0.05}{20}=2.5\times 10^{-3}m/s$

Average speed = 0.0075 m/s

Average velocity = 0.0025 m/s along forward direction

3 0

4 years ago

Read 2 more answers

In which changes of state do atoms lose energy

Anika [276]

Yeah, it's every state. Atoms need a certain quanta of energy to jump to each state of energy, and therefore change state depending on how much energy is absorbed and/or released. This applies to all states of matter.

6 0

3 years ago

Uranium-238 has a half-life of 4.5 billion years. Given that scientists estimate Earth's age to be 4.6 billion years, what is th

anyanavicka [17]

Answer:

103.3 %

Explanation:

For a radioactive isotope, the number of radioactive nuclei left (parent nuclei) after a time t, N(t), is

$N(t)=N_0 (\frac{1}{2})^{\frac{t}{\tau}}$

where

N0 is the initial number of radioactive nuclei

t is the time

$\tau$ is the half-life of the isotope

Here we have

$t=4.5 \cdot 10^9 y\\\tau = 4.6\cdot 10^9 y$

So we find

$\frac{N(t)}{N_0}=(\frac{1}{2})^{\frac{4.5\cdot 10^9}{4.6\cdot 10^9}}=0.508$

Which means that the fraction of parent nuclei left after this time is 0.508 (50.8% of the initial value). So the fraction of daugther nuclei at this time is

$\frac{N_d}{N_0}=1-0.508=0.492$

So the percentage of parent to daughter isotopes is

$\frac{N(t)}{N(d)}=\frac{0.508}{0.492}=1.033$

Which corresponds to 103.3 %.

5 0

4 years ago

The speed of light is 3.00 × 108 m/s in the vacuum of space. what index of refraction would light travel slowest?

ehidna [41]

The refractive index or index of refraction of a medium is the ratio of speed of light in vacuum to that in the medium. It is measured by, $n=\frac{c}{v}$ . 'n' is the refractive index, c is the speed of light in the vacuum and v is the speed of light in the medium. So, the light would travel the slowest in the medium of highest refractive index. Diamond is known to have highest refractive index among the all the natural material. Its refractive index is 2.4175.