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4 years ago

As the elephant falls from 10 m does it lose or gain KE? Explain.

Physics

2 answers:

ivolga24 [154]4 years ago

7 0

He loss KE hope this helps

aleksandr82 [10.1K]4 years ago

6 0

It gains it. As it was stationary before it fell, it had gravitational potential energy, which in terms means it had zero kinetic energy. As it started falling, that GPE was converted to kinetic energy which means an obvious gain in said energy.

Hope this helped!

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Consider a uniformly volume‑charged sphere of radius R and charge Q . What is the electric potential on the surface of the spher

VARVARA [1.3K]

To solve this problem we will start by applying the given load ratio, and we will rely on the two types of distances given. Later we will use Gauss's law and through its integrals, in which it is equivalent to the potential we will obtain its value in the center of the sphere. Since it is uniformly charged we have to,

$\frac{Q'}{Q} = \frac{4\pi r^3}{4\pi R^3}$

$Q' = \frac{r^3}{R^3} Q$

By Gauss Law

$\phi = E \cdot 4\pi r^2$

Here, E is the electric Field and is equal to

$E = \frac{Q'}{\epsilon_0}$

For $\epsilon_0$ being the Permeability constant at free space

Replacing with the previous value we have,

$\phi = \frac{Qr^3}{\epsilon_0 R^3}$

Then the value of the electric field is,

$E = \frac{QR}{4\pi \epsilon_0 R^3}$

Now potential

$V = \int_0^R E\cdot dr'$

$V = - \frac{QR^2}{8\pi \epsilon_0 R^3}$

$V = -\frac{Q}{8 \pi \epsilon_0 R}$

6 0

3 years ago

How can Ohm's Law relate to a house fire?

8_murik_8 [283]

There is no connection there that I can think of.

3 0

4 years ago

The gravitational potential energy of the ball changes as it bounces. Where is the ball located when its gravitational potential

Cloud [144]

When the planet is closest to the Sun, speed v and kinetic energy are the highest, and gravitational potential energy is the lowest. When the planet moves farther away, the speed and kinetic energy decrease, and the gravitational potential energy increases.

5 0

3 years ago

If If the mass of a material is 88 grams and the volume of the material is 24 cm3, what would the density of the material be?

Tanzania [10]

Answer:Mass is measured on a triple beam balance units = GRAMS.

Volume is measured in two ways.

Regular Object = Length X Width X Height units = cm3

Irregular Objects units = mL

 Pour about 50 mL of water into a graduated cylinder. Measure and record the exact amount.

 Add the object. Measure and record the new water level.

 SUBTRACT the original water amount from the new water level to find the volume of the object.

= MASS (g)

VOLUME (cm3

)

Example One:

A mineral has a mass of 100g and a volume of 10 mL. What is its density?

= mass = 100g = 10 g/mL

Volume 10 mL

Example Two:

A mineral has a mass of 25 g and a volume of 5 cm3

. What is its density?

= mass = 25g = 5 g/cm3

Volume 5 cm3

**Mass ÷ Volume to find the numerical answer. Bring over BOTH units**

Explanation:

5 0

4 years ago

A light-year is the distance that light travels in one year. The speed of light is 3.00 × 108 m/s. How many miles are there in o

Alinara [238K]

Answer:

(a) $5.88\times 10^{12}mi$

Explanation:

We have given speed of light $c=3\times 10^8m/sec$

Given time = 1 year =365 days

We know that in 1 minute = 60 sec

1 hour = 60×60 = 3600 sec

In one day = 24 hour = 24×60×60=86400 sec

So in 365 days = 365×86400 $=3.1536\times 10^7sec$

We know that distance = speed ×time $=3.1536\times 10^7\times 3\times 10^8=9.46\times 10^{15}m$

We have given that 1 mi = 1609 m

So $9.46\times 10^{15}m=\frac{9.46\times 10^{15}}{1609}=5.88\times 10^{12}mi$ So option (a) is correct

8 0

3 years ago