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4 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 <span>scientific knowledge which is what makes forensic scientists expert witnesses</span>

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(3mrks) physics solar panel question

shtirl [24]

Some benefits to solar power:
Isolated power is very abundant on earth.
Is very sustainable (5 billion years of good use)
Eco friendly excluding panel production.
Some disadvantages:
Very expensive to set up
Takes up a lot of space per person
Requires exotic materials to construct
Energy storage is difficult with solar cells compared to fossil fuels.

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3 years ago

Does anyone know? Please help! Thank you!

Vedmedyk [2.9K]

B density will increase

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3 years ago

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A solid steel column is 4.0 m long and 0.20 m in diameter. Young's modulus for this steel is 2.0 × 1011 N/m2. By what distance d

zzz [600]

Answer:

3.12 x 10^-5 m

Explanation:

Length of steel column, L = 4 m

diameter, d = 0.2 m

radius = half of diameter = 0.1 m

Young's modulus, Y = 2 x 10^11 N/m^2

Mass of truck, m = 5000 kg

Force, F = mass of truck x acceleration due to gravity

F = 5000 x 9.8 = 49000 N

Area of crossection of cable,

A = $\pi r^{2}=3.14\times\0.1\times0.1=0.0314m^{2}$

Let ΔL be the shrink in length of cable, then by the formula of Young's modulus

$Y=\frac{F\times L}{A\times\Delta L}$

$\Delta L = \frac{F\times L}{A\times Y}$

$\Delta L = \frac{49000\times 4}{0.0314\times 2\times10^{11}}$

ΔL = 3.12 x 10^-5 m

Thus, the shrink in the length of cable is 3.12 x 10^-5 m.

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3 years ago

A horizontal force of magnitude 34.0 n pushes a block of mass 3.93 kg across a floor where the coefficient of kinetic friction i

Katyanochek1 [597]

Some dogs may inherit a susceptibility to epilepsy.

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3 years ago

A certain car is capable of accelerating at a rate of 0.60 m/s^2. How long does it take for this car to go from a speed of 55mi/

motikmotik

Final velocity = Initial velocity – 9.8 * t
Final velocity = 80.5 – 9.8 * 0.0124 = 80.378 m/s
OR
Final velocity = 80.5 – 9.8 * 16.416 = 80.378 m/s

A. -32 m/s
B. -97 m/s
C. -64 m/s
D. -81 m/s
E. -48 m/s

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4 years ago

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