Answer:
Power generate by generator = 265 W (Approx.)
Explanation:
Given:
Mass of student = 62 kg
Height of stairs = 3.4 meter
Time taken = 7 second
Find:
Power generate by generator
Computation:
Power = Force x [Distance / Time]
Power = [Mass x gravitational acceleration] x [Distance / Time]
Power = [62 x 9.8][3.4/7]
Power = [607.6][3.4/7]
Power = 265.12
Power generate by generator = 265.12
Power generate by generator = 265 W (Approx.)
Answer:
a) 27.2 V
b)27.2 V
Explanation:
Charge of the electron =charge of the proton = q = 1.6 × 10⁻¹⁹ C
Radius = r = 0.53×10⁻¹⁰ m
Electric Potential = V = k q/r
k = 9 ×10⁹ N m²/C² = Coulomb's constant.
V = (9 ×10⁹)(1.6 × 10⁻¹⁹)/( 0.53×10⁻¹⁰) = 27.2 V
b) Potential Energy of the electron = k q × q / r
= [(9 ×10⁹)(1.6 × 10⁻¹⁹)(1.6 × 10⁻¹⁹) / (0.53×10⁻¹⁰)] / (1.6 × 10⁻¹⁹) eV,
since 1 electron volt = (1.6 × 10⁻¹⁹)joules
= 27.2 eV
Answer:
D. A negative externality.
Explanation:
Particulate pollution is a form of pollution that is responsible for the degradation of the environment.
Particulate matter is also referred to as particle pollution or atmospheric aerosol particles and it can be defined as a complex microscopic mixture of liquid droplets and solid particles that are suspended in air.
An externality is typically an unwarranted cost or benefit by a manufacturer or producer of goods and services that affects a third party.
In Economics, an externality could either be positive or negative depending on its effect on a third party.
A negative externality arises when the production or consumption of a finished product or service has negative impact (cost) on a third party.
In conclusion, air pollution is an example of a negative externality because it causes harm to a third party.
Answer:
3.85 nm
Explanation:
The volume of a sphere is:
V = 4/3 * π * r^3
The volume of a shell is the volume of the big sphere minus the volume of the small sphere
Vs = 4/3 * π * r2^3 - 4/3 * π * r1^3
Vs = 4/3 * π * (r2^3 - r1^3)
If the difference between the radii is 1 nm
r2 = r1 + 1 nm
Vs = 4/3 * π * ((r1 + 1)^3 - r1^3)
Vs = 4/3 * π * ((r1 + 1)^3 - r1^3)
Vs = 4/3 * π * (r1^3 + 3*r1^2 + 3*r1 + 1 - r1^3)
Vs = 4/3 * π * (3*r1^2 + 3*r1 + 1)
The volme of the shell is equall to the volume of the inner shell:
4/3 * π * (r1^3) = 4/3 * π * (3*r1^2 + 3*r1 + 1)
r1^3 = 3*r1^2 + 3*r1 + 1
0 = -r1^3 + 3*r1^2 + 3*r1 + 1
Solving this equation electronically:
r1 = 3.85 nm
