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3 years ago

14

Which of the following scientists did not contribute scientific discoveries to physical science? A) Isaac Newton B) Marie Curie

C) Gregor Mendel

1 answer:

lianna [129]3 years ago

3 0

Answer:

It is Gregor Mendel because he was a Catholic Augustinian monk and naturalist

Explanation:

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What is depth perception?

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Depth perception is the way in which some animals, such as humans, can tell if a object is close or far away from them.

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3 years ago

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According to ohm’s law, resistance is equal to voltage divided by.

olasank [31]

Answer:

current

Explanation:

According to ohm’s law, resistance is equal to voltage divided by current.

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2 years ago

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An open-end mercury manometer is connected to a low-pressure pipeline that supplies a gas to a laboratory. Because paint was spi

Svetllana [295]

Answer:

a

$P_G = 14.03 \ psig$

b

$h_m = 0.148 \ m$

Explanation:

From the question we are told that

The pressure of the manometer when there is no gas flow is $P_{m} = 15.5 \ psig = 15.5 * 6894.76 = 106868.78 \ N/m^2$

The level of mercury is $h = 950 \ mm = 0.950 \ m$

The drop in the mercury level at the visible arm is $d = 39.0 = 0.039 \ m$

Generally when there is no gas flow the pressure of the manometer is equal to the gauge pressure which is mathematically represented as

$P_g = P_m = g * \delta h * \rho$

Here $\rho$ is the density of mercury with value $\rho = 13.6 *10^{3} kg/m^3$

and $\delta h$ is the difference in the level of gas in arm one and two

So

$\delta h = \frac{106868.78}{ 13.6 *10^{3} * 9.8 }$

$\delta h = 0.802 \ m$

Generally the height of the mercury at the arm connected to the pipe is mathematically represented as

$h_m = 0.950 - 0.802$

=> $h_m = 0.148 \ m$

Generally from manometry principle we have that

$P_G + \rho * g * d - \rho * g * [h - (h_m + d)] = 0$

Here $P_G$ is the pressure of the gas

$P_G +13.6 *10^{3} * 9.8 * 0.039 - 13.6 *10^{3} * 9.8 * [0.950 - (0.148 + 0.039)] = 0$

$P_G = 9.6724 04 *10^{4} \ N/m^2$

converting to psig

$P_G = \frac{ 9.6724 04 *10^{4} }{6894.76}$

$P_G = 14.03 \ psig$

6 0

3 years ago

Need help with this science!!

noname [10]

Lol, I remember I helped my sister with this question but anyways, the card flew because of inertia and the quarter fell in the glass because of gravity :).

3 0

3 years ago

You are the design engineer in charge of testing the crashworthiness of new automobile models. Cars are tested by smashing them

BaLLatris [955]

Answer:

average force is 138900 N

Explanation:

given data

speed = 50 km/h = 13.89 m/s

mass = 1500 kg

time = 0.15 s

to find out

average force

solution

we know initial velocity of car is positive

we will apply here equation to find force that is

Force x change in time that is equal to mass x change in speed ................1

so put here all value of mass, time and velocity in equation 1

Force x 0.15 = 1500 x ( -13.89)

force = 138900 N

so average force is 138900 N

3 0

3 years ago