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Triss [41]
4 years ago
14

What is Precambrian time?

Physics
1 answer:
Ilia_Sergeevich [38]4 years ago
3 0

Answer:

The Precambrian Era comprises all of geologic time prior to 600 million years ago. The Precambrian was originally defined as the era that predated the emergence of life in the Cambrian Period.

Explanation:

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What is the role of pressure and dissolved gases in eruptions?.
Katarina [22]

Answer:

Explanation:

Magma contains dissolved gases, which provide the driving force that causes most volcanic eruptions. As magma rises towards the surface and pressure decreases, gases are released from the liquid portion of the magma (melt) and continue to travel upward, and are eventually released into the atmosphere.

8 0
2 years ago
For a freely falling object dropped from rest, what is the acceleration at the
Zinaida [17]

The acceleration of the object after 3 seconds of fall is -9.8 m/s².

The given parameters;

  • initial velocity of the object, u = 0
  • time of motion of the object, t = 3 seconds

Acceleration is the change in velocity per change in time of motion.

The acceleration of the object after 3 seconds of fall is calculated as follows;

  • Since the object is in free fall, the object experiences only acceleration due to gravity.
  • the magnitude of this acceleration due to gravity is 9.8 m/s²
  • the direction of this acceleration is downwards

 

Thus, the acceleration of the object after 3 seconds of fall is -9.8 m/s².

Learn more here: brainly.com/question/13197713

7 0
3 years ago
A 3.00 kg cart on a frictionless track is pulled by a string so that it accelerates at 2.00 m/s/s. what is the tension in the st
AnnZ [28]
Maybe the picture helps. The blue block represents the cart with a mass of 3 kg. The person(black block) is pulling the cart to the right with a force F so that the acceleration a is 2 m/s². According to Newton's 2nd law: F = m*a.

5 0
3 years ago
Read 2 more answers
In an insulated container, 0.50 kg of water at 80°C is mixed with 0.050 kg of ice at −5.0°C. After a while, all the ice melts, l
Phoenix [80]

Explanation:

When ice tends to absorb heat energy then it will change into liquid state. Now,  change in the temperature of cold water dT = T_{f} - 0^{o}C = T_{f}

Change in the temperature of original water in the container dT' = 80 -T_{f
}

Latent heat of melting of ice L = 80 cal/g

Specific heat of water C = 1 cal/g C

Heat absorbed by ice to melt = mass(m_{i}) x latent heat(L)

Heat absorbed by water = mass(m_{w}) x specific heat(C) x change in temperature (dT')

m_{i} = 0.050 kg = 50 g and m_{w} = 0.50 kg = 500 g

Now, heat lost by water is as follows.

heat lost by hot water( at 80^{o}C)  = heat absorbed by the ice + heat absorbed by cold water

         m_{i} \times L + m_{i} \times C dT = m_{w} \times C dT'

            50 \times 80 + 50 \times 1 \times (T_{f}) = 500 \times 1 \times (80 - T_{f})

So, we will cancel out 50 from each term given above. Hence,

              80 + T_{f} = 800 - 10T_{f}  

               11 T_{f} = 720

               T_{f} = 65.45^{o}C

Thus, we can conclude that final temperature of the water is 65.45^{o}C.

6 0
3 years ago
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Which equation represents the total energy of a system?
suter [353]
Initial Energy+Work=Final Energy
3 0
3 years ago
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