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3 years ago

What criteria might be used to establish someone as an expert witness?

1 answer:

7 0

The criteria someone has to have to establish themselves as an expert witness to offer evaluations of the evidence due to their training and specialized scientific knowledge which is what makes forensic scientists expert witnesses

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True or False: For a longitudinal wave, the wavelength is the distance between compressions.

Schach [20]

Answer:

false....

Explanation:

brainliest

5 0

3 years ago

In your physics lab you are given a 10.1-kg uniform rectangular plate with edge lengths 68.7 cm by 47.5 cm. Your lab instructor

VladimirAG [237]

Answer:

2.35 kgm^2

Explanation:

we take length 68.7 cm as x-axis and 47.5 cm as y-axis then the axis about which we have to find out moment of inertia will be z-axis.

moment of inertia about x-axis

$I_x = ML^2 /3 = 10.1\times 0.4752 /3 = 0.7596$ kg-m2

$I_y = 10.1\times 0.6872 / 3 = 1.5889 kgm^2$

by perpendicular axis theorem

$I_z = I_x + I_y = 0.7596 + 1.5889 = 2.35 kgm^2$

4 0

3 years ago

A converging-diverging nozzle has a throat area of 10 cm2 and an exit area of 28.96 cm2 . A normal shock stands in the exit when

Svetllana [295]

The tank pressure is 5.08 kPa and the mass flow rate is 2.6 kg/s.

The given parameters:

Throat area of the nozzle, $A^*$ = 10 cm² = 0.001 m²
The exit area of the nozzle, A = 28.96 cm² = 0.002896 m²
Air pressure at sea level = 101.325 kPa

The ratio of the areas of the converging-diverging nozzle is calculated as follows;

$= \frac{A}{A^*} \\\\= \frac{0.002896}{0.001} \\\\= 2.896$

From supersonic isentropic table, at $\frac{A}{A^*} = 2.896$ , we can determine the following;

$M_e = 2.6 \ kg/s\\\\\frac{P_o}{P_e} = 19.954$

The tank pressure is calculated as follows;

$\frac{P_o}{P_e} = 19.954 \\\\P_e = \frac{P_o}{19.954} \\\\P_e = \frac{101.325 \ kPa}{19.954} \\\\P_e = 5.08 \ kPa$

Thus, the tank pressure is 5.08 kPa and the mass flow rate is 2.6 kg/s.

Learn more about converging-diverging nozzle design here: brainly.com/question/13889483

8 0

2 years ago

Name the four layers of the atmosphere (in order starting at the bottom

Galina-37 [17]

Answer:

Troposphere, stratosphere, mesosphere and thermosphere. The next region is the exosphere, but that region is 500+ km from the Earth's surface.

6 0

3 years ago

Read 2 more answers

a capacitor is connected accross a bettery? why does each plate recieve a charge of equal to magnitude?

aniked [119]

If you're talking about capacitor connected in series than the charge on each of the capacitor would be same since charge induced on the left plate of capacitor I.e +Q would then induce charge on the right plate of the capacitor as -Q (equal in magnitude but opposite charge) then again the other capacitor next to it would generate +Q charge and so on.

8 0

3 years ago

Read 2 more answers