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4 years ago

7

Explain why a balloon filled with air cannot float in the middle of a room without moving downwards but a helium balloon of the

same size can?

1 answer:

ELEN [110]4 years ago

6 0

Helium is less dense than normal air

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Please describe the relationship between the lithosphere and asthenosphere making sure to incorporate these terms: divergent bou

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4 years ago

A Submerged Ball Part A A ball of mass mb and volume V is lowered on a string into a fluid of density Pi (Figure 1) Assume that

frozen [14]

Answer:

T = mg - $\rho_f$ ×V×g

Explanation:

Here we have the mass of the ball is given as $m_b$

The density of the fluid = $\rho_f$

The volume of the ball = V

Acceleration due to gravity = g

According to Archimedes's principle, the upthrust = Weight of fluid displaced

Tension in string = T = weight of ball - upthrust

T = mg - $\rho_f$ ×V×g

5 0

3 years ago

Which object will have the greatest change in

Brut [27]

(4) a metal sphere with a charge of 1.0 × 10^−9 C <span>moved through a potential difference of 4.0 V would undergo the greatest change in electrical energy from the list. </span>

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3 years ago

Suppose 2.10 C of positive charge is distributed evenly throughout a sphere of 1.30-cm radius. 1) What is the charge per unit vo

Anuta_ua [19.1K]

Answer:

$\rho=2.28\times 10^5\ C/m^3$

Explanation:

Given that,

Charge, Q = 2.1 C

The radius of sphere, r = 1.3 cm = 0.013 m

We need to find the charge per unit volume for this situation. It can be calculated a follows:

$\rho=\dfrac{Q}{\dfrac{4}{3}\pi r^3}\\\\\rho=\dfrac{2.1}{\dfrac{4}{3}\pi \times (0.013)^3}\\\\\rho=2.28\times 10^5\ C/m^3$

So, the charge per unit volume is $2.28\times 10^5\ C/m^3$ .

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3 years ago

One of the possible criteria of Schizophrenia is hallucinations.

Helen [10]

It is true but that’s not Physics

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