Answer:
The crumpled paper hits the ground first due to air resistance. The crumpled paper has less surface area than the flat paper, therefore the crumpled paper hits first.
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Answer:
its something that hold the air for forceing liy by the exgen
Explanation:
Answer:
2025000 J
Explanation:
The formula for kinetic energy is KE=.5(m)(v²).
The initial kinetic energy is 0 because it is at rest. .5(m)(0) = 0.
To calculate the final kinetic energy, use the kinetic energy equation. KE = .5(2000)(45²) = 2025000 J.
To find the change in kinetic energy, you do KE(f) - KE(i). 2025000-0 = 2025000 J.
Answer:
Emf induced in the coli will be equal to 26 volt
Explanation:
We have given number of turns N = 13
It is given that magnetic flux changes from 2.1 Weber to 2.7 Weber in 0.3 sec
Change in flux 
Change in time dt = 0.3 sec
We have to find the induced emf
Induced emf is equal to 
So emf induced in the coil will be equal to 6 volt
Answer:
E = -8.23 10⁻¹⁷ N / C
Explanation:
In the Bohr model, the electric potential for the ground state corresponding to the Bohr orbit is
E = k q₁ q₂ / r²
in this case
q₁ is the charge of the proton and q₂ the charge of the electron
E = - k e² / a₀²
let's calculate
E = - 9 10⁹ (1.6 10⁻¹⁹)² / (0.529 10⁻¹⁰)²
E = -8.23 10⁻¹⁷ N / C
