3 years ago

Which of these statements would best explain the problem encountered with nuclear waste disposal?

Physics

1 answer:

irga5000 [103]3 years ago

6 0

A) <span>The isotopes have a long half-life and only remain radioactive for a long time period.

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A plane is heading south with a velocity of 150 kilometers/hour. It experiences a tallwind with a velocity of 20 kilometers/hour

pogonyaev

Answer: 170km/hr to the South

Explanation:

The resultant velocity of the plane ilwill be gotten by adding the value of the velocities of the plane with the tallwind. It should be noted that the direction of the wind is.takwn into consideration.

Therefore, the resultant velocity of the plane will be:

= 20km/hr + 150km/hr

= 170km/hr to the South

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3 years ago

Ram travel 50metre on a straight road in 30second . hari covers the same distance on the same road in 45s . who has done more wo

Likurg_2 [28]

Answer:

The ram has done more work because the rate at which the ram work is 1.6m/s and Hari is 1.1m/s

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3 years ago

What do wolves do to make hunting easier? /sharpen claws/ /hibernate/ /have distinct call/ /hunt in packs/ ASAP UNIT TEST

Novay_Z [31]

Wolves will hunt in packs to make hunting easier.

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3 years ago

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A comet is in an elliptical orbit around the Sun. Its closest approach to the Sun is a distance of 4.7 1010 m (inside the orbit

Lubov Fominskaja [6]

Answer:

58515.9 m/s

Explanation:

We are given that

$d_1=4.7\times 10^{10} m$

$v_i=9.5\times 10^4 m/s$

$d_2=6\times 10^{12} m$

We have to find the speed (vf).

Work done by surrounding particles=W=0 Therefore, initial energy is equal to final energy.

$K_i+U_i=K_f+U_f$

$\frac{1}{2}mv^2_i-\frac{GmM}{d_1}=\frac{1}{2}mv^2_f-\frac{GmM}{d_2}$

$\frac{1}{2}v^2_i-\frac{GM}{d_1}+\frac{GM}{d_2}=\frac{1}{2}v^2_f$

$v^2_f=2(\frac{1}{2}v^2_i-\frac{GM}{d_1}+\frac{GM}{d_2})$

$v_f=\sqrt{2(\frac{1}{2}v^2_i-\frac{GM}{d_1}+\frac{GM}{d_2})}$

Using the formula

$v_f=\sqrt{v^2_i+2GM(\frac{1}{d_2}-\frac{1}{d_1})}$

$v_f=\sqrt{(9.5\times 10^4)^2+2\times 6.7\times 10^{-11}\times 1.98\times 10^{30}(\frac{1}{6\times 10^{12}}-\frac{1}{4.7\times 10^{10})}$

Where mass of sun= $M=1.98\times 10^{30} kg$

$G=6.7\times 10^{-11}$

$v_f=58515.9 m/s$

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3 years ago

Animals are the only way that native plant seeds can be dispersed.<br> O True<br> O False

irakobra [83]

True
Because it’s always been true

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2 years ago

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