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3 years ago

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A typical adult can deliver about 12.5 N·m of torque when attempting to open a twist-off cap on a bottle. Assume that bottle cap

is about 2.0 cm in diameter.1) What is the maximum force that the average person can exert with his fingers?

1 answer:

Nikitich [7]3 years ago

3 0

Uhhhhhhhhh just tryna get a point so I can ask a question so eh I’m using ur question heheheheheh

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A ball of mass 0.6 kg flies through the air at low speed, so that air resistance is negligible. What is the net force acting on

Anettt [7]

To solve this problem we will apply Newton's second law. The second law says that mass by acceleration is equivalent to the Force exerted on a body. Mathematically this

$F = ma$

Here,

m = mass

a = Acceleration

The ball flies through the air under the effect of gravity only. Therefore the acceleration is due to gravity, we have that

$a = - g$

Then,

$F = -mg$

Replacing

$F = -0.6*9.8$

$F = -5.88N$

The negative sign implies that the force acting on the ball is in the downward direction that is towards the negative y direction.

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Steam enters a well-insulated nozzle at 200 lbf/in.2 , 500F, with a velocity of 200 ft/s and exits at 60 lbf/in.2 with a velocit

Ede4ka [16]

Answer:

$386.2^{\circ}F$

Explanation:

We are given that

$P_1=200lbf/in^2$

$P_2=60lbf/in^2$

$v_1=200ft/s$

$v_2=1700ft/s$

$T_1=500^{\circ}F$

$Q=0$

$C_p=1BTU/lb^{\circ}F$

We have to find the exit temperature.

By steady energy flow equation

$h_1+v^2_1+Q=h_2+v^2_2$

$C_pT_1+\frac{P^2_1}{25037}+Q=C_pT_2+\frac{P^2_2}{25037}$

$1BTU/lb=25037ft^2/s^2$

Substitute the values

$1\times 500+\frac{(200)^2}{25037}+0=1\times T_2+\frac{(1700)^2}{25037}$

$500+1.598=T_2+115.4$

$T_2=500+1.598-115.4$

$T_2=386.2^{\circ}F$

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Answer:

1. D. They can be a substance, material, object or source of energy.

2. B. The properties will be different.

3. C. When two reactants form one product, the reaction is spontaneous.

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C. is the answer because acceleration is the change in velocity in time while velocity is speed with a direction

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B the metals in the core are very heavy

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