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Luden [163]
3 years ago
5

Which example describes a nonrenewable resource? In some areas in California, people can use heat found deep in the Earth to hea

t their homes. Refineries process oil, found in the Earth, and turn it into gasoline to be used by cars. The town has decided to install solar panels on all city buildings. The hilltop lodge has a windmill that generates enough electricity to power the entire house.
Physics
2 answers:
sveta [45]3 years ago
5 0

The correct answer is B. Refineries process oil, found in the Earth, and turn it into gasoline to be used by cars.

Explanation

A non-renewable resource is a term used to refer to minerals and resources extracted from the Earth that cannot be renewed after their use, for example, fossil fuels such as oil or gas from the subsoil of the Earth, because after their use, they cannot be renewed unlike resources such as wind or sun that do not end. So, the correct answer is B. Refineries process oi, found in the Earth and turn it into gasoline to be used by cars.

Anna007 [38]3 years ago
4 0
The second one: Refineries process oil found in the Earth, and turn it into gasoline to be used by cars. 

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Interestingly, there have been several studies using cadavers to determine the moment of inertia of human body parts by letting
loris [4]

Answer:

0.08735 kgm²

Explanation:

m = Mass of lower leg = 5 kg

L = Length of leg = 18 cm

g = Acceleration due to gravity = 9.81 m/s²

f = Frequency = 1.6 Hz

I = Moment of inertia

Time period is given by

T=2\pi\sqrt{\dfrac{I}{mgL}}

Also

T=\dfrac{1}{f}

So,

I=\dfrac{mgL}{(2\pi f)^2}\\\Rightarrow I=\dfrac{5\times 9.81\times 0.18}{(2\pi 1.6)^2}\\\Rightarrow I=0.08735\ kgm^2

The moment of inertia of the lower leg is 0.08735 kgm²

8 0
4 years ago
Water enters a house at 1.5 m/s through a pipe with an inside radius of 1.0cm and at a pressure of 400,000 Pa. The water then tr
kupik [55]

Answer:

pressure of the water = 3.3 × 10^{5} pa

Explanation:

given data

velocity v1 = 1.5 m/s

pressure P = 400,000 Pa

inside radius r1 = 1.00 cm

pipe radius r2 = 0.5 cm  

h1 = 0 (datum at inlet)

h2 = 5.0 m (datum at inlet)

density of water ρ = 1000 kg/m³

to find out

pressure of the water

solution

we consider here flow speed in bathroom that is =  v2 and Pressure in bathroom is =  P2  

here we will use both continuity and Bernoulli equations

because here we have more than one unknown so that  

v1 × A1 = v2 × A2 × P1 +  ρ g h1 + (0.5)ρ v1² = P2 + ρ g h2 + (0.5) ρ v2²

now we use here first continuity equation for get v2

v2 = v1 \frac{A1}{A2}    

v2 = 1.5 \frac{\pi * 0.01^2}{\pi * 0.005^2}    

v2 = 6 m/s

and now we use here bernoulli eqution for find here p2 that is

P2 = P1 - 0.5× ρ ×(v2² - v1²) - ρ g (h2- h1 )

P2 = 400000  - 0.5× 1000 ×(6² - 1.5²) - 1000 × 9.81 × (5-0 )

P2 = 3.3 × 10^{5} pa

3 0
3 years ago
The wave speed on a string under tension is 200 m/s. What is the speed if the tension is doubled?
Maksim231197 [3]

Answer:

v = 282.84 m / s

Explanation:

The speed of a wave in a wire is given by the equation

       .v = √ T /ρ

Where v is the speed of the wave, T the tension in the wire and ρ the density of the wire

 If the tension is doubled

        T = 2T₀

        v = √ (2T₀ / ρ)

        v = √2   √ T₀ / ρ

        v = √2  v₀

calculate

       v = √2  200

       v = 282.84 m / s

3 0
3 years ago
A spring with a constant of 92N/m is compressed 2.8 cm. How much potential energy is stored in the spring?
Arada [10]

Answer:

0.036J

Explanation:

Given parameters:

Spring constant , K  = 92N/m

Compression  = 2.8cm  = 0.028m

Unknown:

Potential energy  = ?

Solution:

To solve this problem;

          P.E  =\frac{1}{2} K e²

 K is the spring constant

 e is the compression

so;

      P.E = \frac{1}{2}  x 92 x 0.028²  = 0.036J

6 0
3 years ago
A woman can row a boat at 4.0 mph is still water.
vovikov84 [41]

Answer:

1) \theta=120^{\circ} from the positive x-axis.

2) t=20\ min

Explanation:

Given:

speed of rowing in still water, v=4\ mph

1)

speed of water stream, v_s=2\ mph

we know that the direction of resultant of the two vectors is given by:

tan\ \beta=\frac{v.sin\ \theta}{v_s+v.cos\ \theta}

where:

\beta=the angle of resultant vector from the positive x-axis.

\theta = angle between the given vectors

When the rower wants to reach at the opposite end then:

\beta =90^{\circ}

so,

tan\ 90^{\circ}=\frac{v.sin\ \theta}{v_s+v.cos\ \theta}

\Rightarrow v_s+v.cos\ \theta=0

2+4\times cos\ \theta=0

cos\ \theta=-\frac{1}{2}

\theta=120^{\circ} from the positive x-axis.

2)

Now the resultant velocity of rowing in the stream:

v_r=\sqrt{v^2+v_s^2+2\times v.v_s.cos\ \theta}

v_r=\sqrt{4^2+2^2+2\times 4\times 2\times cos\ 120}

v_r=12\ mph

Therefore time taken to cross a 4 miles wide river:

t=\frac{4}{12}

t=\frac{1}{3}\ hr

t=20\ min

8 0
3 years ago
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