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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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If the mass of a material is 111 grams and the volume of the material is 23 cm3, what would the density of the material be? g/cm
Butoxors [25]
Density can be kg/m^3 or g/cm3
In g/cm3 density =mass /volume =111g/23cm3
=4.826g/cm3.

In kg/m3,density=mass/volume. converting mass in grams to kg, 1000g=1kg,111g=0.111kg.
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density=0.111kg/0.000023m3 or 2.3*10^-5=4,826.1kg/m3.

the other is a long process.
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3 years ago
A motorcycle is stopped at a stop light. When the light turns green it
ss7ja [257]

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i did the kinematic equation & found the answer.

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Mars has a mass of about 6.4 x 1023 kg, and its moon Phobos has a mass of about 9.6 x 1015 kg. If the magnitude of the gravitati
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8 0
3 years ago
A 50-kg satellite circles the Earth in an orbit with a period of 120 min. What minimum energy is required to change the orbit to
uysha [10]

Answer: 2.94×10^8 J

Explanation:

Using the relation

T^2 = (4π^2/GMe) r^3

Where v= velocity

r = radius

T = period

Me = mass of earth= 6×10^24

G = gravitational constant= 6.67×10^-11

4π^2/GMe = 4π^2 / [(6.67x10^-11 x6.0x10^24)]

= 0.9865 x 10^-13

Therefore,

T^2 = (0.9865 × 10^-13) × r^3

r^3 = 1/(0.9865 × 10^-13) ×T^2

r^3 = (1.014 x 10^13) × T^2

To find r1 and r2

T1 = 120min = 120*60 = 7200s

T2 = 180min = 180*60= 10800s

Therefore,

r1 = [(1.014 x 10^13)7200^2]^(1/3) = 8.07 x 10^6 m

r2 = [(1.014 x 10^13)10800^2]^(1/3) = 10.57 x 10^6 m

Required Mechanical energy

= - GMem/2 [1/r2 - 1/r1]

= (6.67 x 10^-11 x 6.0 x 10^24 * 50)/2 * [(1/8.07 × 10^-6 )- (1/10.57 × 10^-6)]

= (2001 x 10^7)/2 * (0.1239 - 0.0945)

= (1000.5 × 10^7) × 0.0294

= 29.4147 × 10^7 J

= 2.94 x 10^8 J.

6 0
3 years ago
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