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3 years ago

A tuning fork vibrates 240 times per second. What is the frequency and period?

Physics

1 answer:

OverLord2011 [107]3 years ago

7 0

Answer:

Frequency is expressed in Hertz, which is simply cycles per second. If a tuning fork (or anything else, for that matter) vibrates 1 time each second, it's frequency is 1 Hz. So then, if it vibrates 4280 in 20 seconds, then 4280÷20=214 cycles per second = 214 Hz.

Explanation:

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Two point charges of equal magnitude are 8.0 cm apart. At the midpoint of the line connecting them, their combined electric fiel

bagirrra123 [75]

Answer:

r = 8/2 = 4cm = 0.04m

k = 9×10^9

Enet = 51 N/C

Enet = E1 + E2

since E1 = E2

E1 = Enet/2 = 51/2

E/2 = kq/r²

q = Er²/2k

q = (51 × 0.04²)/(2×9×10^9)

q = 4.5×10^-12 C

q1 = q2 = 4.5 pC

Explanation:

The electric field is a region around a

charge in which it exerts electrostatic force

on another charges. While the strength of

electric field at any point in space is called

electric field intensity. It is a vector

quantity. Its unit is NC¯¹.

According to coulomb’s law ,if a unit

positive charge q (call it a test charge) is

brought near a charge q (call a field

charge) placed in space,the charge q will

experience a force. The value of this force

depends upon the distance between the

two charges. If the charge q is moved

away from q ,this force would decrease till

at a certain distance the force would be

practically reduced to zero. The charge q

is then out of the influence of charge q.

The region of space surrounding the charge

q in which it exerts a force on the charge

q is known as E.F of the charge

q. Mathematically it is expressed as:

E =F/q

The direction of the vector E is the same

as the direction of F,because q is a

positive scalar. Dimensionally,the E.F is

force per unit charge,and its SI unit is the

newton/coulomb (N/C).

7 0

2 years ago

Carlos is making phosphorous trichloride using the equation below. He adds 15 g of phosphorus.

Degger [83]

Given:

The balanced chemical reaction of the synthesis of phosphorus trichloride:

2P + 3Cl2 ===> 2PCl3

Initial amount of phosphorus = 15 grams

The amount of product produced from 15 grams of phosphorus:

15 grams / 31 g/mol * (2/2) = 66.46 grams PCl3

The amount of chlorine is 44.31 grams, nearest to 45 grams.

8 0

3 years ago

Read 2 more answers

During the latter part of your European vacation, you are hanging out at the beach at the gold coast of Spain. As you are laying

Jlenok [28]

Well, I guess you can come close, but you can't tell exactly.

It must be presumed that the seagull was flying through the air
when it "let fly" so to speak, so the jettisoned load of ballast
of which the bird unburdened itself had some initial horizontal
velocity.

That impact velocity of 98.5 m/s is actually the resultant of
the horizontal component ... unchanged since the package
was dispatched ... and the vertical component, which grew
all the way down in accordance with the behavior of gravity.

98.5 m/s = √ [ (horizontal component)² + (vertical component)² ].

The vertical component is easy; that's (9.8 m/s²) x (drop time).
Since we're looking for the altitude of launch, we can use the
formula for 'free-fall distance' as a function of acceleration and
time:

   Height = (1/2) (acceleration) (time²) .

If the impact velocity were comprised solely of its vertical
component, then the solution to the problem would be a
piece-o-cake.

Time = (98.5 m/s) / (9.81 m/s²) = 10.04 seconds
whence
   Height = (1/2) (9.81) (10.04)²

      = (4.905 m/s²) x (100.8 sec²) = 494.43 meters.

As noted, this solution applies only if the gull were hovering with
no horizontal velocity, taking careful aim, and with malice in its
primitive brain, launching a remote attack on the rich American.

If the gull was flying at the time ... a reasonable assumption ... then
some part of the impact velocity was a horizontal component. That
implies that the vertical component is something less than 98.5 m/s,
and that the attack was launched from an altitude less than 494 m.

8 0

3 years ago

A fan converts 4.2 kJ of electrical energy to kinetic energy every minute. The power of the fan is...

miss Akunina [59]

The power of the fan is 70 Watt.

<h3 /><h3>What is power?</h3>

Power can be defined as the rate at which energy is used. The S.I unit of power is Watt (W)

The power of the fan can be calculated using the formula below.

<h3>Formula:</h3>

P = E/t.......................... Eqaution 1

<h3>Where:</h3>

P = Power of the fan
E = Energy of the fan
t = time

From the question,

<h3>Given:</h3>

E = 4.2 kJ = 4200 J
t = 1 minutes = 60 seconds.

Substitute these values into equation 1

P = 4200/60
P = 70 Watt.

Hence, The power of the fan is 70 Watt.

Learn more about power here: brainly.com/question/3631756

4 0

2 years ago

What is frequency of light is emitted when an electron jumps into the smallest orbit of hydrogen, coming from a very large radiu

mrs_skeptik [129]

Answer:

$3.28403\times 10^{15}\ Hz$

Explanation:

$n_1$ = 1

$n_2=\infty$

h = Planck's constant = $6.626\times 10^{-34}\ m^2kg/s$

The energy is given by

$E(n)=E_1(\dfrac{1}{n_1^2}-\dfrac{1}{n_2^2})\\\Rightarrow E(1)=13.6\ eV$

Energy is also given by

$E=hf\\\Rightarrow f=\dfrac{E}{h}\\\Rightarrow f=\dfrac{13.6\times 1.6\times 10^{-19}}{6.626\times 10^{-34}}\\\Rightarrow f=3.28403\times 10^{15}\ Hz$

The frequency of light emitted would be $3.28403\times 10^{15}\ Hz$

7 0

3 years ago