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4 years ago

WHEN WAS THE FIRST CAR INVENTED?

Engineering

2 answers:

Sladkaya [172]4 years ago

8 0

The first true automobile was invented in 1885/1886 by Karl Benz

avanturin [10]4 years ago

7 0

Answer:

Exactly who invented the automobile is a matter of opinion. If we had to give credit to one inventor, it would probably be Karl Benz from Germany. Many suggest that he created the first true automobile in 1885/1886.

Explanation:

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If 20 kg of iron, initially at 12 °C, is added to 30 kg of water, initially at 90 °C, what would be the final temperature of the

rjkz [21]

Answer:

final temperature of the combined system T = 84.78°C

Explanation:

Given data

mass of iron ( m1 ) = 20 kg

temperature iron ( t1 ) = 12 °C

mass of water ( m2 ) = 30 kg

temperature of water ( t2 ) = 90 °C

To find out

final temperature of the combined system

solution

we know the energy requirement formula to rise the temp

energy = mass × specific heat × change in temperature

we combine both system so both energy will be added

and

we know specific heat of iron ( c1 ) = 0.450 kJ/kg

and specific heat of water ( c2 ) = 4.186 kJ/kg

4.186 joule/gram °C

now combine both energy

energy = mass, m1 × specific heat, c1 × change in temperature, T - t1 + mass, 2 × specific heat, c2 × change in temperature, T - t2

energy = 20 × 0.450 × T - 12 + 30 × 4.186 × T -90

(20)(0.45)(T−12)=(30)(4.186)(90−T)

final temperature of the combined system T = 84.78°C

5 0

3 years ago

What is the eye an example of? sense organ stimulus a relay neuron

Vikentia [17]

sens organ is the eye example

3 0

2 years ago

A stream of moist air flows into an air conditioner with an initial humidity ratio of 0.6 kg(vapor)/kg(dry air), and a dry air f

BaLLatris [955]

Answer:

$\omega_{out} = 0.867\,\frac{kg\,H_{2}O}{kg\,DA}$

Explanation:

The final humidity ratio is computed by the Principle of Mass Conservation:

Dry Air

$\dot m_{in} = \dot m_{out}$

Moist

$\dot m_{in} \cdot \omega_{in} + \dot m_{w} = \dot m_{out}\cdot \omega_{out}$

Then, the final humidity ratio is:

$\omega_{out} = \frac{\dot m_{in}\cdot \omega_{in}+\dot m_{w}}{\dot m_{out}}$

$\omega_{out} = \omega_{in} + \frac{\dot m_{w}}{\dot m_{out}}$

$\omega_{out} = 0.6\,\frac{kg\,H_{2}O}{kg\,DA} + \frac{0.4\,\frac{kg\,H_{2}O}{s} }{1.5\,\frac{kg\,DA}{s} }$

$\omega_{out} = 0.867\,\frac{kg\,H_{2}O}{kg\,DA}$

4 0

3 years ago

4. Porcelain enamel is sometimes referred to as A. "glass lining" B. kaolin C. vitreous enamel D. Both A and C.

Likurg_2 [28]

The answer is Both A and C. It is also known as glass lining and vitreous enamel.

Explanation:

Porcelain enamel is sometimes referred to as glass lining and vitreous enamel. It is a thin layer of ceramic or glass applied to a substrate of metal, which is used to protect surfaces from chemical attack and physical damage.

They can modify the structural characteristics of the substrate and improve the appearance of the product.

Porcelain enamel coating is used in applications like smooth, very durable, scratch and chemical resistant coating is needed. Industrial porcelain enamel is also known as glass lining are used in industrial rather than artistic and applications.

7 0

3 years ago

A car is moving at 68 miles per hour. The kinetic energy of that car is 5 × 10 5 J.How much energy does the same car have when i

Blababa [14]

Answer:

The car has an energy of 1.017 × 10⁵ J when it moves at 97 miles per hour

Explanation:

Given the data in the question;

Initial velocity v₁ = 68 miles per hour = 30.398 meter per seconds

let mass of the car be m

kinetic energy of that car is 5 × 10⁵ J

E₁ = $\frac{1}{2}$ mv²

we substitute

5 × 10⁵ = $\frac{1}{2}$ × m × ( 30.398 )²

5 × 10⁵ = m × 462.019

m = 5 × 10⁵ / 462.019

m = 1082.2065 kg

Now, Also given that; v₂ = 97 miles per hour = 43.362 meter per seconds

E₂ = $\frac{1}{2}$ mv₂²

we substitute

E₂ = $\frac{1}{2}$ × 1082.2065 × ( 43.362 )²

E₂ = $\frac{1}{2}$ × 1082.2065 × 1880.263

E₂ = 1.017 × 10⁵ J

Therefore, The car has an energy of 1.017 × 10⁵ J when it moves at 97 miles per hour

6 0

3 years ago