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Vedmedyk [2.9K]
2 years ago
12

9

Physics
2 answers:
sammy [17]2 years ago
8 0
Find attached the solution
ladessa [460]2 years ago
7 0

Answer:

5 m/s

Explanation:

Rate of movement is   distance / time

6 m / 1.2 s = 5 m/s

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A coil is made of 150 turns of copper wire wound on a cylindrical core. If the mean radius of the turns is 6.5 mm and the diamet
Nadusha1986 [10]

Answer:

0.84 Ω

Explanation:

r = mean radius of the turn = 6.5 mm

n = number of turns of copper wire = 150

Total length of wire containing all the turns is given as

L = 2πnr

L =  2 (3.14)(150) (6.5)

L = 6123 mm

L = 6.123 m

d = diameter of the wire = 0.4 mm = 0.4 x 10⁻³ m

Area of cross-section of the wire is given as

A = (0.25) πd²

A = (0.25) (3.14) (0.4 x 10⁻³)²

A = 1.256 x 10⁻⁷ m²

ρ = resistivity of copper = 1.72 x 10⁻⁸ Ω-m

Resistance of the coil is given as

R = \frac{\rho L}{A}

R = \frac{(1.72\times 10^{-8}) (6.123))}{(1.256\times 10^{-7}))}

R = 0.84 Ω

6 0
4 years ago
Some jovian planets give off more energy than they receive because ofa. fusion in their coresb. tidal heatingc. ongoing contract
faltersainse [42]

Answer:

the energy emission process is due to nuclear fusion

Explanation:

In the planetary system the energy emitted by bodies is a part of the energy received by a hot body (star), this star is what creates the entire energy cycle of a given planet. This creates the entire tidal movement, continental drift

 If the planets reach a certain size the gravitational force near their center is so great that the atoms are crushed and some beginnings of fusion processes are formed where some atoms are transformed from hydrogen to helium releasing a certain amount of energy and heat that believe that the planet emits more energy than it receives from its star.

In summary, the energy emission process is due to nuclear fusion

7 0
3 years ago
Read 2 more answers
A 45-gram object that has a volume of 9 mL has a density of
Elan Coil [88]
The answer : a. 5 g/mL
7 0
4 years ago
If 20N force produces an acceleration of 5ms^-2 In a body then the mass of the body will be:
meriva
F = ma
m = F/a
m = 20N / 5m/s^2
m = 4kg
5 0
3 years ago
A communications satellite transmits a radio wave at a frequency of 5 • 10^9 Hz. What is the signal's wavelength? Assume the wav
ycow [4]
Frequency f =5×10^9Hz
Speed of radio waves=speed of light c =3×10^8m/s

Wavelength λ = c/f
= 3×10^8/5×10^9
= 0.06m
3 0
4 years ago
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