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Anni [7]
3 years ago
15

What resistance would produce a current of 120A from a 6-volt battery?

Physics
1 answer:
andriy [413]3 years ago
6 0
120/6=20 ohms :) would be the ans
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Count the number of atoms of each element in this molecule: 3He(H20)2 PLEASE HELPP!!!!!!​
kykrilka [37]

Answer:

He=3 H=6 O=6

Explanation:

8 0
3 years ago
A fuse in an electric circuit is a wire that is designed to melt, and thereby open the circuit, if the current exceeds a predete
zmey [24]

Answer:

The diameter of wire should be 4.04 \times 10^{-4} m

Explanation:

Given:

Current density J = 500 \times 10^{4} \frac{A}{m^{2} }

Current I = 0.64 A

From the formula of current density,

  J = \frac{I}{A}

Where A = area of cylindrical wire = \pi r^{2}

  \pi r^{2} = \frac{I}{J}

  r^{2} = \frac{I}{\pi J }

   r = \sqrt{\frac{0.64}{3.14 \times 500 \times 10^{4} } }

   r = 2.02 \times 10^{-4}m

For finding the diameter of wire,

   d = 2r

   d = 4.04 \times 10^{-4}m

Therefore, the diameter of wire should be 4.04 \times 10^{-4} m

8 0
3 years ago
How much thermal energy is required to raise the temperature of 5 kg of water 50℃? The specific heat of water is 4168 J/kg*C.
sasho [114]

Answer/solution:

Given :

Mass =5kg

T 1 =20 C,T 2  =100 ∘C

ΔT=100−20=80 ∘C

Q=m×C×ΔT

where C= specific heat capacity of water

=4200J/(kgK)

Q=5×4200×80

=1680000 Joule.

=1680KJ

3 0
2 years ago
What is the velocity of a wave with a wavelength of 1.5m and a frequency of 500 Hz
Schach [20]
Wave speed  =  (wavelength) x (frequency)

                       = (1.5 m) x (500 / sec)

                       =       750 m/s .  
4 0
3 years ago
What is the physical significance of momentum. Like velocity gives us how position is changing with respect to time, what does m
disa [49]
Momentum helps us quantify how much movement an object has. For example, if we want to know how much movement an object of 2 kg moving at 4 m/s has, we take their product.
7 0
3 years ago
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