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2 years ago

What are advantages and disadvantages of using a solar cooker compared to other meanings of cookings?

1 answer:

8 0

The advantage of using a solar cooker is that it is Eco-friendly and the disadvantage is that it can be used only under certain conditions.

<h3><u>Explanation:</u></h3>

A solar cooker is used for cooking food without having to use electricity or gas. Instead, the appliance uses heat from the sun to cook food. It is used widely in by people who travel in remote areas or go on trips. But the appliance has limitations of its own too.

ADVANTAGES

Using it is friendly to the environment
It can be easily assembled without expert assistance
No compromise on the quality and taste of foo

DISADVANTAGES

Requires sun to function and prepare food
Cannot function in winters or monsoon when the sun isn't present
Does not retain heat as efficiently and quickly as compared to other cooking appliances

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blsea [12.9K]

Answer: Hey

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2 years ago

2. How many grams of water can be heated from 20.0°C to 75°C using<br><br><br> 12500.0 Joules?

bogdanovich [222]

Answer:

Grams of water can be heated from 20.0°C to 75°C using 12500.0 Joules = 54.3 g

Explanation:

Heat required to increase temperature

H = mcΔT

m = mass of material

C = specific heat of material

ΔT = Change in temperature.

Here we need to find how many grams of water can be heated from 20.0°C to 75°C using 12500.0 Joules

That is

H = 12500 J

Specific heat of water, C = 4186 J/kg°C

ΔT = 75 - 20 = 55

Substituting

12500 = m x 4186 x 55

m = 0.0543 kg

m = 54.3 g

Grams of water can be heated from 20.0°C to 75°C using 12500.0 Joules = 54.3 g

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2 years ago

How does the theory of natural selection explain the diversity of life?

Pavlova-9 [17]

Because the ones that have better adaptions survive and spread on the genes for that adaptation

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2 years ago

There is a known potential difference between two charged plates of 12000 Volts. An object with a charge of 6.5 x 10-6 C charge

s344n2d4d5 [400]

Answer:

1.97 m/s.

Explanation:

From the question,

Using the law of conservation of energy,

The energy stored in the charged plate = Kinetic energy of the mass

1/2(qV) = 1/2mv².......................... Equation 1

Where q = charge, V = voltage, m = mass, v = velocity.

make v the subject of the equation

v = √(qV/m)......................... Equation 2

Given: q = 6.5×10⁻⁶ C, V = 12000 Volts, m = 0.02 kg

Substitute these values into equation 2

v = √(6.5×10⁻⁶×12000 /0.02)

v = √3.9

v = 1.97 m/s.

7 0

3 years ago

A school bus has a mass (including the driver and passengers) of 1.64 times 10^4 kg and is driving north at a speed of 15.2 km/h

Butoxors [25]

Answer:

Explanation:

Given

mass of bus along with travelers travelling in North direction is $m_1=1.6\times 10^4 kg$

speed of bus towards North $v_1=15.2 km/h\approx 4.22\ m/s$

mass of bus travelling in South direction is $m_2=1.578\times 10^4 kg$

speed of bus $v_2=12.2 km/h\approx 3.38\ m/s$

mass of each Passenger in south moving bus $m_0=64.8 kg$

Momentum of North moving bus

$P_1=m_1\times v_1$

$P_1=1.6\times 10^4\times 4.22$

$P_1=6.768\times 10^4 kg-m/s$

Momentum with south moving bus

$P_2=m_2\times v_2+n\cdot m_0\times v_2$

$P_2=(1.578\times 10^4+n\cdot 64.8 )\cdot 3.38$

For total momentum to be towards south

$P_2-P_1$ should be greater than 0

thus for least value of n

$P_2=P_1$

$(1.578\times 10^4+n\cdot 64.8 )\cdot 3.38=6.768\times 10^4$

$1.578\times 10^4+n\cdot 64.8=2.0023\times 10^4$

$n=\frac{4243.6686}{64.8}=65.48\approx 66$

5 0

2 years ago