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4 years ago

Match the term to the correct description.

Physics

1 answer:

Lelechka [254]4 years ago

7 0

1. Open circuit

2. Electricity
3. Circuit
4. Series circuit

5. Parallel circuit

6. Resistor

7. Closed circuit

8. switch

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Anorexia nervosa is generally a problem found in young girls. True False

garik1379 [7]

Answer:

true

Explanation:

depends on how young it starts usually at age 10 or 12 sometimes 13 are the most common ages to start this

8 0

3 years ago

How is the acceleration of a car traveling on an elevated air track related to the angle of elevation and the height of elevatio

vitfil [10]

on a given inclined we know that net force is given by

$F_{net} = - mgsin\theta$

here we know that

$F_{net} = ma$

so here we have

$ma = - mg sin\theta$

$a = - gsin\theta$

so here acceleration depends directly on angle of inclination

now we also know that if height of the inclined is H and its length is L

then we can write

$sin\theta = \frac{H}{L}$

so the acceleration is given as

$a = - g*\frac{H}{L}$

so acceleration also depends directly on height of the inclined plane

4 0

3 years ago

3.7.6. A satellite is in a circular orbit around the Earth. If it is at an altitude equal to twice the radius of the Earth, 2RE,

salantis [7]

Answer:

Explanation:

For acceleration due to gravity

g = GM / R² ---------------------------- ( 1 )

At height 2R , radius of orbit is 3R .

If speed of satellite be v

m v² / 3R = GMm / (3R)² ( centripetal force = gravitational force )

v² = GM / 3R -------------------------------------- ( 2 )

Dividing (1) and (2)

v² / g = R / 3

v² = gR / 3

v = √( gR / 3 )

6 0

3 years ago

A rock of mass 0.340 kg is spun horizontally at the end of a wire that has a diameter of 1.00 mm. If the wire gets stretched by

borishaifa [10]

Answer:

Y = 78.13 x 10⁹ Pa = 78.13 GPa

Explanation:

First we will find the centripetal force acting on the wire as follows:

F = mv²/r

where,

F = Force = ?

m = mass of rock = 0.34 kg

v = speed = 19 m/s

r = length of wire

Therefore,

F = (0.34)(19)²/r

F = 122.74/r

now, we find cross-sectional area of wire:

A = πd²/4

where,

A = Area = ?

d = diameter of wire = 1 mm = 0.001 m

Therefore,

A = π(0.001)²/4

A = 7.85 x 10⁻⁷ m²

Now, we calculate the stress on wire:

Stress = F/A

Stress = (122.74/r)/(7.85 x 10⁻⁷)

Stress = 1.56 x 10⁸/r

Now, we calculate strain:

Strain = Δr/r

where,

Δr = stretch in length = 2 mm = 0.002 m

Therefore,

Strain = 0.002/r

now, for Young's modulus (Y):

Y = Stress/Strain

Y = (1.56 x 10⁸/r)/(0.002/r)

Y = 78.13 x 10⁹ Pa = 78.13 GPa

8 0

2 years ago

Which of the following is the reason why the magnetic flux through the bracelet is changing?

charle [14.2K]

Answer:

a. The magnitude of the magnetic field is changing.

b. The magnetic field is changing direction with respect to the bracelet.

c. The bracelet is moving in the magnetic field.

Explanation:

Magnetic flux is a measure of the total magnetic field that passes through a given area. The value of the flux depends on the magnitude of the magnetic field, the area it crosses and its orientation relative to the magnetic field. Therefore, all three reasons are valid.

4 0

3 years ago