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3 years ago

عند زيادة تردد الدينامو . فماذا يحدث لشده التيار المار بالدائرة

Physics

1 answer:

saveliy_v [14]3 years ago

4 0

Answer:

تقل شدة التيار

Explanation:

عند زيادة التردد تزداد سرعة الدوران وهذا يعني زيادة في الفولتية.

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The outer ear channels sound waves down the external __________ to the __________, a tight membrane that vibrates in response to

kakasveta [241]

Answer:

B. pinna . . . eardrum

Explanation:

Hearing is one unique feature of organisms performed by the EAR in humans and some other animals. The ear functions to transmit sound vibrations as impulses to the brain, which sends it back as sound. Specific part of the ear plays a pivotal role in bringing about the hearing process.

The external or visible part of the ear called PINNA channels or guide the sound waves coming from the external environment into the EARDRUM OR TYMPANIC MEMBRANE, which vibrates in response to the reception of the sound waves.

7 0

3 years ago

Read 2 more answers

7. A 1300 kg car starts at rest and rolls down a hill from a height of 10.0 m. It then moves across a level (frictionless) surfa

makkiz [27]

Answer:

0.505 m

Explanation:

From the question,

The kinetic energy of the car = energy stored in the spring

1/2mv² = 1/2ke²...................... Equation 1

Where m = mass of the car, v = velocity of the car, k = spring constant of the car, e = extension/compression

make e the subject of the equation

e = v√(m/k)............... Equation 2

We can calculate the value of v, by applying,

v² = u²+2gH...................... Equation 3

Where u = initial velocity of the car, H = height of the car, g = acceleration due to gravity.

Given: u = 0 m/s (from rest), H, 10 m, g = 9.8 m/s²

Substitute into equation 2

v² = 2(10×9.8)

v² = 196

v = √196

v = 14 m/s

Also given: m = 1300 kg, e = 1.0×10⁶ N/m =1000000 N/m

Substitute into equation 2

e = 14√(1300/1000000)

e = 14√(0.00013)

e = 14(0.036)

e = 0.505 m

Hence the maximum distance of the spring is compressed = 0.505 m

5 0

3 years ago

Which sections of the heating curve illustrate this process?

kirill115 [55]

Answer:

B followed by D

Explanation:

The heat energy absorbed at B goes into potential energy that breaks the inter-molecular bonds and thus the constant temperature. Once the molecules have gained enough energy they escape the closely bonded structure and thus are free to move in random directions due to high kinetic energy. At this point (part D) an increase in heat energy leads to an increase in the kinetic energy leading to an increase in the temperature.

5 0

3 years ago

Where are the physics in football

sasho [114]

Answer:

The branch of physics that is most relevant to football is mechanics, the study of motion and its causes.

Explanation:

When the ball leaves the punter's foot, it is moving with a given velocity (speed plus angle of direction) depending upon the force with which he kicks the ball. The ball moves in two directions, horizontally and vertically. Because the ball was launched at an angle, the velocity is divided into two pieces: a horizontal component and a vertical component.

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3 years ago

A stone is thrown straight up. While the stone is rising:

melamori03 [73]

Answer:

D. its acceleration is zero

Explanation:

Acceleration can be defined as the rate of change of the velocity of an object with respect to time.

This simply means that, acceleration is given by the subtraction of initial velocity from the final velocity all over time.

Hence, if we subtract the initial velocity from the final velocity and divide that by the time, we can calculate an object’s acceleration.

Mathematically, acceleration is given by the equation;

$Acceleration (a) = \frac{final \; velocity - initial \; velocity}{time}$

In this scenario, a stone is thrown straight up. While the stone is rising its acceleration is zero because it's initial velocity is zero and it's until the stone reaches its highest point before the acceleration becomes constant and acting downward.

5 0

3 years ago

عند زيادة تردد الدينامو . فماذا يحدث لشده التيار المار بالدائرة ​

عند زيادة تردد الدينامو . فماذا يحدث لشده التيار المار بالدائرة