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lawyer [7]
3 years ago
13

3. How many elements are found naturally on the Farth? *

Physics
1 answer:
valentinak56 [21]3 years ago
6 0

Answer:

Fir wat glasss

Explanation:

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Two identical metal balls a and b are mounted on insulating rods. Ball a has a charge of +q/2 and ball b is initially uncharged.
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Answer:

Help me please?

Explanation:

Did you get the answer? I believe it’s either C. +q or D. 0

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What is the average speed of a bird that flies 1.55 km in 30 minutes
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Question
MariettaO [177]
Electrical Energy to ThermalEnergy Conversions. 
1. A toaster draws electric current (electrical energy) from a wall outlet and converts these moving electriccharges into heat (thermal energy) in the filaments that turn red hot to cook your toast.

Part 2:
the law of conservation of energy states that the total energy of an isolated system in a given frame of reference remains constant—it is said to be conserved over time. Energy can neither be created nor destroyed; rather, it transforms from one form to another.

Hope I could help
source: wiki & soft schools
7 0
3 years ago
A ball thrown horizontally from the top of a building hits the ground in 0.600 s. If it had been thrown with twice the speed in
ludmilkaskok [199]

Answer:

none of the answers is correct, the time  is the same  t₁ = t₂ = 0.600 s

Explanation:

This is a kinematics exercise, analyze the situation a bit. The vertical speed in both cases is the same is zero, the horizontal speed in the second case is double (vₓ₂ = 2 vₓ₁)

let's find the time to hit the ground

     y = y₀ + I go t - ½ g t²

     0 = y₀ - ½ g t²

     t = √ 2y₀ / g

with the data from the first launch

     y₀i = ½ g t²

     y₀ = ½  9.8  0.6²

     y₀ = 1,764 m

with this is the same height the time to descend in the second case is the same

    t₂ = 0.600 s

this is because the horizontal velocity change changes the offset on the x axis, but does not affect the offset on the y axis

Therefore, none of the answers is correct, the time  is the same

t₁ = t₂ = 0.600 s

5 0
3 years ago
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