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3 years ago

14

Do i become a professional astrophysicist after getting PhD in Astrophysics ? Or will i be a postdoc research student i mean wil

l i be practicing under another researcher ? Will i get the correct salary just after finishing PhD ?

1 answer:

DaniilM [7]3 years ago

4 0

Most jobs in Astrophysics require a PhD. That's why that's what I'll be going for when I start my degree in it.

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7. Sanitizing method that are uses chlorine, iodine, and quaternary ammonium. A. ) heat C.) cooking B) chemicals D.) detergent

AleksandrR [38]

Answer:

Chemicals

Explanation:

Sanitizing method that are uses chlorine, iodine, and quaternary ammonium is <u>chemicals</u>.

Extra Info : -

Sanitizing is also achieved through the use of chemical compounds capable of destroying disease causing bacteria. Common sanitizers are chlorine (bleach), iodine, and quaternary ammonium. Chemical sanitizers have found widespread acceptance in the food service industry.

7 0

2 years ago

A young child is playing with a very flexible hose. She is moving her hand back and forth making transverse type waves. She move

aev [14]

Answer:

The waves will increase in frequency

Explanation:

As the young girl moves her hand back and forth faster, it will be observed that number of back and forth motions increase every second. Also the distance between crest and trough of the wave (wavelength) will be reduced as she moves her hand back and forth faster.

Frequency = number of turns (moves) per second

The waves will increase in frequency since there will be more number of back and forth motions in every second.

Also,

The distance between crest and trough will be reduced, which implies that there will be decrease in waves wavelength.

This can also be verified using wave equation;

V = Fλ

At constant velocity,

F ∝ ¹/λ

Thus, decrease in wavelength will cause increase in frequency of the waves.

The right answer is : The waves will increase in frequency

5 0

3 years ago

Use a common denominator to find-2/3 + -4/5

Juliette [100K]

Answer:

-22/15

Explanation:

the least common denominator is 15 so first you multiply -2/3 by 5 in both the numerator and denominator making it -10/15

Then you do the same to -4/5 except you multiply the numerator and denominator by 3 giving you -12/15

If you add -10/15+ -12/15 you get -22/15

6 0

3 years ago

If a 2 cm vector represents speed, and 1 cm equals 5 m/s, how fast is the represented

Ne4ueva [31]

Answer: 10m/s

Explanation: Since a single vector with length of 1cm expresses 5m/s, the vector which has a length doubled from the original vector should have the speed which is also doubled.

6 0

3 years ago

Dana is on a train traveling at a speed of 20 km/h. Dana walks from the front of the train to the back of the train at a speed o

dezoksy [38]

Answer:

Diana's speed relative to ground is <u>16 km/h</u> in the direction of motion of train.

Explanation:

Given:

Velocity of train in forward direction is, $v_{t,g}=20\ km/h$

Here, $v_{t,g}\to \textrm{velocity of the train relative to ground.}$

Velocity of Diana relative to train in the backward direction is, $v_{D,t}=-4\ km/h$

Negative sign implies backward motion or motion opposite to the direction of train's motion. Here, Diana is walking from front of train to back. So, Diana is moving in the opposite direction.

Now, we know that, for two bodies 'A' and 'B', velocity of 'A' relative to ground is given as:

$v_{A,g}=v_{B,g}+v_{A,B}$

Therefore, velocity of Diana relative to ground is given as:

$v_{D,g}=v_{t,g}+v_{D,t}$

$v_{D,g}=(20-4)\ km/h$

$v_{D,g}=16\ km/h$

So, Diana's speed relative to ground is 16 km/h in the direction of motion of train.

5 0

3 years ago