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2 years ago

What is a vortex? what cause a vortex to from?

Physics

1 answer:

Shtirlitz [24]2 years ago

7 0

Answer:

A vortex is a physics phenomenon that occurs when a gas or a liquid moves in circles. At the center is a vortex line that the matter swirls around. They are formed when there is a difference in the velocity of what surrounds the line.

Explanation: birb

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Two footballs (A & B) are thrown with the same amount of force. Football A has a greater mass. Describe the acceleration for

Sauron [17]

Newton's second law gives the relationship between force applied to an object, its mass and its acceleration:
$F=ma$
where F is the force, m the mass and a the acceleration.

A force F is applied to football A, whose mass is $m_A$ , and so the acceleration of this football will be given by (re-arranging the previous equation)
$a_A = \frac{F}{m_A}$

Similarly, the acceleration of football B will be
$a_B= \frac{F}{m_B}$
where $m_B$ is the mass of football B, and where the force F applied to the two footballs is the same.

Since football A has greater mass than football B, $m_A \ \textgreater \ m_B$ , if we compare the two previous formula we see that the acceleration of football B is greater than the acceleration of football A:
$a_B \ \textgreater \ a_A$
Therefore, if the same force is applied to the two footballs, football B will accelerate more than football A.

8 0

4 years ago

Oscillations of electricity and magnetism create ________________________ waves, which include visible light waves.

kaheart [24]

Explanation:

radio waves, which include visible light waves.

4 0

3 years ago

What is the effective resistance r of the two-resistor system? express the effective resistance in terms of r1 and r2?

Alekssandra [29.7K]

As per the question, the resistor system contains two resistors.

The two resistors are denoted as $r_{1}\ and\ r_{2}\ respectively$

We are asked to calculate the effective resistance in terms of $r_{1}\ and\ r_{2}\ respectively$

The two resistors can be connected in two ways.

CASE-1: Let the resistors are connected in series.

When the resistors are connected in series, the effective resistance is the algebraic sum of the individual resistors.

Hence, the effective resistance $r= r_{1} +r_{2}$ [ans]

CASE-2: Let the resistors are connected in parallel.

The effective resistance is calculated as follows-

$\frac{1}{r}= \frac{1}{ r_{1}}+ \frac{1}{r_{2}}$

$=\frac{r_{1}+ r_{2}} {r_{1} r_{2}}$

⇒ $r =\frac{r_{1} r_{2}} { r_{1} +r_{2}}$ [ans]

4 0

4 years ago

1. If a radioactive sample has an initial count rate of 600 Bq. What is its count

Virty [35]

Answer:

See explanation

Explanation:

Since the original count rate is 600 Bq,

i) after 1 half life, the count rate decreases to 1/2 of 600 Bq = 300 Bq

ii) after 2 half lives, the count rate decreases to 1/4 of 600 = 150 Bq

iii) after 3 half lives, the count rate decreases to 1/6 of 600 = 100 Bq

iv) after 4 half lives, the count rate decreases to 1/8 of 600 = 75 Bq

3 0

3 years ago

5. A projectile is fired in Earth's gravitational field with a horizontal velocity of y = 9.00 m/s.

aniked [119]

Answer:

Explanation:

Given

Horizontal velocity = 9.00m/s

time taken = 0.550 s

Required

How far does the projectile fall in the vertical direction

Using the formula for finding the maximum height of the projectile

H = U²sin²θ/2g where;

U = 9.00m/s

θ = 90° (object launched in the vertical direction)

g = 9.81m/s²

Substituting the given parameters into the formula;

H = 9²sin²90/2(9.81)

H = 81(1)/19.62

H = 81/19.62

H = 4.128 m

H ≈ 4.13m

Hence the distance that the projectile fall in the vertical direction is 4.13m

3 0

4 years ago