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Sladkaya [172]
3 years ago
8

An electron is accelerated by a constant electric field of magnitude 410 N/C. Find the acceleration of the electron. The electro

n has a charge of e = 1.6 X 10-19 C.
a. 1.82 X 108 m/s2
b. 6.56 X 1013 m/s2
c. 0 d. 2.56 X 1021 m/s2
e. 3.90 X 10-22 m/s2
Physics
1 answer:
Arisa [49]3 years ago
8 0

Answer:

option B

Explanation:

given,

magnitude of electric field, E = 410 N/C

charge of electron , q = 1.6 x 10⁻¹⁹ C

we know,

F = q E

and also

F = m a

equating both the force equation

m a = q E

m is the mass of electron = 9.11 x 10⁻³¹ Kg

so,

a = \dfrac{q E}{m}

a = \dfrac{1.6\times 10^{-19}\times 410}{9.11\times 10^{-31}}

     a = 7.2 x 10¹³ m/s²

The nearest answer is option B.

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Answer:

6.71 × 10^8 mi/hr

Explanation:

Light is usually defined as an electromagnetic wave that is comprised of a definite wavelength. It is of both types, visible and invisible. The light emitted from a source usually travels at a speed of about 3 × 10^8 meter/sec. This speed of light is commonly represented by the letter 'C'.

To write it in the metric system, it has to be converted into miles/hour.

We know that,

1 minute = 60 seconds

60 minutes = 1 hour

1 kilometer = 1000 meter

1 miles = 1.6 kilometer

Now,

= \frac{3 \times\ 10^8 meter \times\ 60 sec \times\ 60 min}{1 sec \times\ 1 min \times\ 1 hr}

= 1.08 × 10^12 m/ hr (meter/hour)

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Thus, the value for speed of light (C) in metric unit is 6.71 × 10^8 mi/hr.

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3 years ago
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2 years ago
A truck with a heavy load has a total mass of 7100 kg. It is climbing a 15∘ incline at a steady 15 m/s when, unfortunately, the
Andrej [43]

Answer:

The load has a mass of 2636.8 kg

Explanation:

Step 1 : Data given

Mass of the truck = 7100 kg

Angle = 15°

velocity = 15m/s

Acceleration = 1.5 m/s²

Mass of truck = m1 kg

Mass of load = m2 kg

Thrust from engine = T

Step 2:

⇒ Before the load falls off, thrust (T) balances the component of total weight downhill:

T = (m1+m2)*g*sinθ

⇒ After the load falls off, thrust (T) remains the same but downhill component of weight becomes  m1*gsinθ .

Resultant force on truck is F = T – m1*gsinθ  

F causes the acceleration of the truck: F= m*a

This gives the equation:

T – m1*gsinθ = m1*a  

T = m1(a + gsinθ)

Combining both equations gives:

(m1+m2)*g*sinθ = m1*(a + gsinθ)

m1*g*sinθ + m2*g*sinθ =m1*a + m1*g*sinθ

m2*g*sinθ = m1*a

Since m1+m2 = 7100kg, m1= 7100 – m2. This we can plug into the previous equation:

m2*g*sinθ = (7100 – m2)*a

m2*g*sinθ = 7100a – m2a

m2*gsinθ + m2*a = 7100a

m2* (gsinθ + a) = 7100a

m2 = 7100a/(gsinθ  + a)

m2 = (7100 * 1.5) / (9.8sin(15°) + 1.5)

m2 = 2636.8 kg

The load has a mass of 2636.8 kg

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Answer:

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Explanation:

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