3 years ago

How does radiation work in solid , liquid gases

Physics

1 answer:

lakkis [162]3 years ago

5 0

radiation waves strike a material. some of the energy can be absorbed, some can be reflected some can be transmitted.

Radiation travels more rapidly and efficiently through gases

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What is the twisted ladder shape of the DNA called?

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Answer:

Double helix

Explanation:

The Double helix is a DNA molecule. The two strands around the Double Helix is called the twisted ladder.

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You have two springs that are identical except that spring 1 is stiffer than spring 2, (k1 > k2). On which spring is more wor

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Answer:

Explanation:

Given

Two springs with spring constant $k_1$ and $k_2$

(a)If they are stretched using the same force

Force $F=k_1x_1=k_2x_2$

where $x_1$ and $x_2$ are the extension in the spring

so $\frac{k_1}{k_2}=\frac{x_2}{x_1}$

therefore $x_2 > x_1$

Work done is given by

$W=F\cdot x$

$W_1=F\cdot x_1$

$W_2=F\cdot x_2$

thus $W_2 > W_1$

(b)If they are stretched the same distance

$\frac{F_1}{F_2}=\frac{k_1}{k_2}$

Thus $F_1 > F_2$

For same extension, work done by Force 1 is more

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4 years ago

The magnitude of the action potential is correlated with the strength of the stimulating input. True or False

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Answer:

True

Explanation:

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3 years ago

26. A 40 kg boy jumps from a height of 4m onto a plate-form mounted on springs. As the

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Answer:

c. 1600J

Explanation:

The loss in potential energy of the boy is given by:

$U=mg \Delta h$

where

m = 40 kg is the mass of the boy

g = 9.8 m/s^2 is the acceleration of gravity

$\Delta h = 4 m + 0.02 m = 4.02 m$ is the total change in the height of the boy (4 metres + 2 cm due to the compression of the spring)

Substituting, we find

$\Delta U = (40 kg)(9.8 m/s^2)(4.02 m) = 1577 J \sim 1600 J$

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<span>fast-moving particles colliding with slow-moving particles</span>

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