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4 years ago

14

" why is more force needed to slide a large book across a table than to slide a small book across the same table?"

1 answer:

nasty-shy [4]4 years ago

8 0

For an object to move its force must be greater than its mass for able for it to move. Let say you have a 10 kg box and a 50 kg box in the floor. you tried to push the 10 kg and its easier because force depends on its mass and your acceleration. Hope this helps

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A cool down is considered the activity performed

tangare [24]

did you mean what activities are performed during the cool down?

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3 years ago

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

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

$P_G = 14.03 \ psig$

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3 years ago

The equivalent capacitance of three capacitors, each of capacitance C connected at series

katrin2010 [14]

Answer:

In Series:

1/C = 1/c1 + 1/c2 + 1/c3

Explanation:

For equivalent,

1/C = 3/c

Ce = c/3

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3 years ago

Wood has chemical energy, which can be used to generate thermal and radiant energy when burned in a fireplace. Which best explai

Citrus2011 [14]

Answer:

C

Explanation: i took the test

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4 years ago

Read 2 more answers

A 1750kg bumpercar moving at 1.50m/s to the right collides elastically with a 1450kg car going to the left at 1.10m/s. The 1750k

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1984.08 kg that’s the answer

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3 years ago