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Nezavi [6.7K]
2 years ago
12

Astronomers were at first surprised to find complicated molecules in the interstellar medium. They thought ultra-violet light fr

om stars would break apart such molecules. What protects the molecules we observe from being broken apart
Physics
1 answer:
jeka57 [31]2 years ago
8 0

Answer:

The dust present in the clouds.

Explanation:

The complicated composition molecules that can be found in space are generally associated with clouds of dust. The significant amount of dust in these clouds provides protection not only for these molecules, but for any body that makes up or is associated with dust clouds.

It is exactly this dust that protects the molecules against the action of ultraviolet rays.

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Which satellite has the greatest gravitational force with Earth?
EastWind [94]

Answer:

Satellite D has a mass (kg) of 500 and the distance from Earth (km) is 320.

Explanation:

The universal law of gravitation states that the force between two objects in the universe is directly proportional to the product of their masses and inversely proportional to the square of the distance between them.

We have to choose the satellite having greatest gravitational force with earth. In all options the distance from the earth is same i.e. 320 km. So, we have to select the satellite having maximum mass because the mass of the earth is constant.

Hence, the correct option is (D) " Satellite D has a mass (kg) of 500 and the distance from Earth (km) is 320 ".

5 0
3 years ago
Read 2 more answers
A train travels 90 kilometers in 1 hour, and then 82 kilometers in 5 hours. What is it’s average speed?
PIT_PIT [208]
Distance is 90km,time 1 hr
distance 2 is 82km,time 5 hrs
average speed=total distance travelled/total time taken.
90+82=172/5+1=6
average speed=28.7km over hour
4 0
3 years ago
PLEASE HURRY
Vikentia [17]

Answer: B superconductors

Explanation:

8 0
2 years ago
What is the average velocity of the time interval 0 to 4 seconds
Anvisha [2.4K]
Average velocity over a given time interval is the distance traveled divided by the time:
v= \frac{60m-20m}{4s-0s} =40/4=10 \frac{m}{s} 
7 0
3 years ago
Assume that the turntable deccelerated during time Δt before reaching the final angular velocity ( Δt is the time interval betwe
Zina [86]

Answer:

See below...

Explanation:

Let’s express ⟨α⟩ in terms of ωi , ωf , and Δt. and torque in terms of It , ωi , ωf , and Δt.

STEP 1.  

The rate of change of angular velocity is Angular acceleration.  

The net change in angular velocity is Average angular acceleration divided by the elapsed time.

⟨α⟩ = ω f −ω i/Δt

STEP 2.

Torque is assumed this way

          dω

   τ = I ----

           dt

.

⟨τ ⟩ = I t (ω f −ω i )/Δt

6 0
3 years ago
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