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3 years ago

Describe the differences and similarities between levers and hydraulics

1 answer:

3 0

It has been known that the discovery of machines have been one of the most beneficial inventions of all time. These simple machines include levers, wheels gears, pulleys and wedges. Among these machines, lever is more likely confused and associated with hydraulics. To differentiate the two; a lever is machine that has inverse effect of one side when a force is applied on the other side, for example a seesaw. While hydraulic machine is quite more complicated than the aforementioned machines and uses liquid power to do simple work like that of an excavator.

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If racing alcohol has a mass density of 790kg/m3, what mass will a 1250-litre tank hold?

Marina86 [1]

Density = Mass per unit Volume
that is,
D = m / V

Now,
We've been provided with,

Density = 790 kg/m³
Volume = 1250 litres = 1.250 m³

Now,
$density = \frac{mass}{volume} \\ 790 = \frac{m}{1.250} \\ 790 \times 1.250 = m \\ m = 790 \times 1.250 \\ m = 790 \times \frac{1250}{1000} \\ m = 790 \times \frac{5}{4} \\ m = 197.5 \times 5 \\ m = \frac{1975}{10} \times 5 \\ m = \frac{1975}{2} = 987.5 \: kg$

987.5 kg of mass will a 1250 litres tank will hold.

Please Mark It As Brainliest Answer_

3 0

4 years ago

Based on its location on the periodic table, which metal is likely to be less reactive than rubidium and more reactive than calc

Korvikt [17]

Answer:

A i think tell me if i got it right

Explanation:

Based on the location on the periodic table, Potassium (K) is the metal that will be less reactive than rubidium and more reactive than calcium.

6 0

4 years ago

Which planets receive more of the Sun's concentrated light?

Ilia_Sergeevich [38]

Answer: Mercury is closest to the Sun and receives more of the Sun's concentrated light.

Explanation: I hope this helps :]

7 0

3 years ago

Read 2 more answers

The heat flux for a given wall is in the x-direction and given as q^n = 11 W/m^2, the walls thermal conductivity is 1.7 W/mK and

MrMuchimi

Answer:

$\frac{dT}{dx} = 6.47 ^oC/m$

Also as we can see the equation that heat flux directly depends on the temperature gradient so more is the temperature gradient then more will be the heat flux.

For positive temperature gradient the heat will flow outwards while for negative temperature gradient the heat will flow inwards

Explanation:

As we know that heat flux is given by the formula

$q^n = K\frac{dT}{dx}$

here we know that

K = thermal conductivity

$\frac{dT}{dx}$ = temperature gradient

now we know that

$q^n = 11 W/m^2$

also we know that

K = 1.7 W/mK

now we have

$11 = 1.7 \frac{dT}{dx}$

so temperature gradient is given as

$\frac{dT}{dx} = \frac{11}{1.7} = 6.47 K/m$

also in other unit it will be same

$\frac{dT}{dx} = 6.47 ^oC/m$

Also as we can see the equation that heat flux directly depends on the temperature gradient so more is the temperature gradient then more will be the heat flux.

For positive temperature gradient the heat will flow outwards while for negative temperature gradient the heat will flow inwards

5 0

3 years ago

If you push on a wall of a building what will happen

mixas84 [53]

Answer: It will push back with an equal amount of force.

8 0

3 years ago