The electric current leaves the battery through the --- complete this blank

Two equipotential surfaces surround a +2.90 x 10-8-C point charge. How far is the 220-V surface from the 85.0-V surface?

RUDIKE [14]

The potential difference isV=220−85=135.
Now the potential V at distance d from a point charge Q isV=Q/4πϵ0d
If you solve this for d and plug in the potential difference you will get the answer.

4 0

3 years ago

A massless, hollow sphere of radius R is entirely filled with a fluid such that its density is p. This same hollow sphere is now

Vesnalui [34]

Answer:

a. 8p

Explanation:

We are given that

Radius of hollow sphere , R1=R

Density of hollow sphere= $\rho$

After compress

Radius of hollow sphere, R2=R/2

We have to find density of the compressed sphere.

We know that

$Density=\frac{mass}{volume}$

$Mass=Density\times volume=Constant$

Therefore, $\rho_1 V_1=\rho_2V_2$

Volume of sphere= $\frac{4}{3}\pi r^3$

Using the formula

$\rho\times \frac{4}{3}\pi R^3=\rho_2\times \frac{4}{3}\pi (R/2)^3$

$\rho R^3=\rho_2\times \frac{R^3}{8}$

$\rho_2=8\rho$

Hence, the density of the compressed sphere= $8\rho$

Option a is correct.

7 0

3 years ago

Calcula el tiempo que tarda en llegar a la Tierra la luz del sol si viaja a 300.000 km/s sabiendo que la distancia del sol a la

Strike441 [17]

Calculate the time it takes for sunlight to reach Earth if it travels at 300,000 km / s, knowing that the distance from the sun to the earth is 150,000,000 km. Express it in minutes

Answer:

8.3min

Explanation:

Given parameters:

Speed of sunlight = 300000km/s

Distance of sun and earth = 150000000km

Unknown:

Time in minutes = ?

Solution:

To solve this problem;

Speed = $\frac{distance }{time}$

Time = $\frac{distance}{speed}$

Now insert the parameters and find the speed;

Time = $\frac{150000000}{300000}$ = 500s

Now;

60s makes 1 minute

500s will give $\frac{500}{60}$ = 8.3min

5 0

3 years ago

The speed of light is around 3.000E5 km/s. It takes approximately 9.221 seconds for light reflected from the moon Vega to reach

laila [671]

Answer:

$d=2.77\cdot 10^6\ Km$

Explanation:

<u>Speed</u>

The speed is calculated as the ratio of the distance d by the time t:

$\displaystyle v=\frac{d}{t}$

If we need to calculate the distance, the equation is solved for d:

d=v*t

The speed of light is

$v=3\cdot 10^5\ Km/s$

It takes t=9.221 seconds for light reflected from the moon Vega to reach planet Xartan.

We can calculate the average distance the light traveled:

$d=3\cdot 10^5\ Km/s*9.221$

$d=2,766,300\ Km$

Or, in scientific notation:

$\mathbf{d=2.77\cdot 10^6\ Km}$

6 0

3 years ago

What would be a disadvantage of asexual reproduction for an organism

Tems11 [23]

A negative mutation can make asexually produced organisms susceptible to disease and can destroy large numbers of offspring. Some methods of asexual reproduction produce offspring that are close together and compete for food and space. Unfavourable conditions such as extreme temperatures can wipe out entire colonies.

5 0

3 years ago