3 years ago

Identify the characteristic of gravity that is incorrect,

Physics

2 answers:

34kurt3 years ago

7 0

You can that gravity is not real

lapo4ka [179]3 years ago

3 0

Answer:It makes astronauts weightless.

Explanation:

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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

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

$500+1.598=T_2+115.4$

$T_2=500+1.598-115.4$

$T_2=386.2^{\circ}F$

7 0

3 years ago

A uniform rod of length L, mass M, is suspended by two thin strings. Which of the following statements is true

Fantom [35]

Answer:

(d) not enough info

Explanation:

because it doesn't specify where the strings are attached

if it was the two ends of the rod then T1 would be equal to T2

6 0

2 years ago

A 15g football was kicked to an acceleration of 55m/s2. What was the force applied to it? 40N 3.7N 825N

Pepsi [2]

Answer:

f =ma = 0.015 * 55 = 0.825 N

so yeah that's ur ans

8 0

2 years ago

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which statement is true about wind energy? A) It is clean and non-polluting. B) It is only effective near water. C) It is costly

nikitadnepr [17]

I think it would be option A .

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3 years ago

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What is the ultimate energy for all life on earth

professor190 [17]

The sun. Is the answer

7 0

2 years ago