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3 years ago

How would you generate awareness in your school/society regarding renewable energy and its importances?

Physics

1 answer:

HACTEHA [7]3 years ago

6 0

Explanation:

<h3>Using clean, renewable energy is </h3><h3>one of the most important actions </h3><h3>you can take to reduce your impact </h3><h3>on the environment. Electricity production is our #1 source of greenhouse gases, more than all of our </h3><h3>driving and flying combined, and clean </h3><h3>energy also reduces harmful smog, toxic buildups in our air and water, and the </h3><h3>impacts caused by coal mining and gas extraction. But replacing our fossil-fuel infrastructure will take</h3><h3> time—and strong, consistent support from both state and federal </h3><h3>mandates to build renewable energy generation and demand for clean energy from consumers and businesses.</h3>

<h3>Why Renewable Energy? </h3>

<h3>Electricity generation is the second leading cause of industrial air</h3><h3> pollution in the U.S. </h3><h3>Most of our electricity comes from coal, nuclear, and other non-renewable power plants. Producing energy from these </h3><h3>resources takes a severe toll on our environment, polluting our air, land, and</h3><h3> water.</h3>

<h3>Renewable energy sources can be used to produce electricity with</h3><h3> fewer environmental impacts. It is possible to make electricity from renewable energy sources without producing carbon dioxide (CO2), the leading cause of global climate change.</h3>

<h3>Renewables Benefit the Economy</h3><h3>Renewable energy provides reliable power supplies and fuel diversification, which enhance energy security, </h3><h3>lower risk of fuel spills, and reduce</h3><h3> the need for imported fuels. Renewable energy also helps conserve the nation's natural resources.</h3>

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When a 2.60-kg object is hung vertically on a certain light spring described by Hooke's law, the spring stretches 2.86 cm. (a) W

Goryan [66]

Answer:

a) k = 891.82 N/m

b) e = 0.0143 m = 1.43 cm

c) W = 5.02 J

Explanation:

Step 1: Data given

Mass = 2.60 kg

the spring stretches 2.86 cm = 0.0286

Step 2: What is the force constant of the spring?

Force constant, k = force applied / extension produced

k = (2.60kg * 9.81N/kg) / 0.0326 m

k = 891.82 N/m

b) If the 2.60-kg object is removed, how far will the spring stretch if a 1.30-kg block is hung on it

Extension = F/k = (1.30 kg * 9.81) / 891.82 = 0.0143 m = 1.43 cm

Half the mass means half the extension

c) How much work must an external agent do to stretch the same spring 7.50 cm from its unstretched position?

W = average force used * distance

W = 1/2 * k*e * e = 1/2 k*e²

W = 1/2 * 891.82 * (0.075)² = W = 5.02 J

5 0

3 years ago

15. An e.mf. of 16 volts is induced in a coil of inductance 4H. The rate of change of current must be:

alex41 [277]

0 64 A/S for surety of

7 0

3 years ago

A uniform disk has a mass of 3.7 kg and a radius of 0.40 m. The disk is mounted on frictionless bearings and is used as a turnta

yuradex [85]

Answer:

1.25 kgm²/sec

Explanation:

Disk inertia, Jd =

Jd = 1/2 * 3.7 * 0.40² = 0.2960 kgm²

Disk angular speed =

ωd = 0.1047 * 30 = 3.1416 rad/sec

Hollow cylinder inertia =

Jc = 3.7 * 0.40² = 0.592 kgm²

Initial Kinetic Energy of the disk

Ekd = 1/2 * Jd * ωd²

Ekd = 0.148 * 9.87

Ekd = 1.4607 joule

Ekd = (Jc + 1/2*Jd) * ω²

Final angular speed =

ω² = Ekd/(Jc+1/2*Jd)

ω² = 1.4607/(0.592+0.148)

ω² = 1.4607/0.74

ω² = 1.974

ω = √1.974

ω = 1.405 rad/sec

Final angular momentum =

L = (Jd+Jc) * ω

L = 0.888 * 1.405

L = 1.25 kgm²/sec

5 0

3 years ago

Use the circuit diagram to determine the voltage drop across the 8 Ω resistor.

Rainbow [258]

First we need to find the current flowing in the circuit. The three resistors are in series, so the equivalent resistance of the circuit is the sum of the three resistances:
$R_{eq} = R_1 + R_2 + R_3 = 10.0 \Omega + 8.0 \Omega +6.0 \Omega = 24.0 \Omega$

Then we can apply Ohm's law to the whole circuit, to find the current flowing:
$I= \frac{V}{R_{eq}}= \frac{12 V}{24.0 \Omega}=0.5 A$

And now we can apply Ohm's law to the resistor of $8.0 \Omega$ to find the voltage drop across it:
$V_{8\Omega} =IR=(0.5 A)(8.0 \Omega)=4 V$

8 0

3 years ago

Read 2 more answers

Before hanging new William Morris wallpaper in her bedroom, Brenda sanded the walls lightly to smooth out some irregularities on

Allushta [10]

To solve the exercise it is necessary to apply the equations necessary to apply Newton's second law and the concept related to frictional force.

An angle of 30 degrees is formed on the vertical at an applied force of 2.3N

In this way the frictional force, opposite to the movement will be given by

$f_k = \mu_k N$

where,

$\mu_k =$ Kinetic friction constant

N = Normal Force (Mass*gravity)

The friction force is completely vertical and opposes the rising force of 2.3 N. The Normal force acts perpendicular to the surface (vertical) therefore corresponds to the horizontal component of the applied force.

The ascending force would be given by

$F_v = 2.3N*Cos30 = 1.99N$