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Amanda [17]
4 years ago
11

What time period did fish develop

Physics
1 answer:
marysya [2.9K]4 years ago
5 0

Answer:

They developed during the Cambrian time period, which was around 530 million years ago.

Explanation:

Hope this Helps!

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If a special type of ice has a specific heat capacity of 2060 J/kg K. How
KengaRu [80]

Answer:

Q = 144612 Joules.

Explanation:

Given the following data;

Mass = 2.6 kg

Initial temperature = -27°C to Kelvin = 273 + (-27) = 246K

Final temperature = 0°C to Kelvin = 273K

Specific heat capacity = 2060 J/kgK.

To find the quantity of heat absorbed;

Heat capacity is given by the formula;

Q = mcdt

Where;

Q represents the heat capacity or quantity of heat.

m represents the mass of an object.

c represents the specific heat capacity of water.

dt represents the change in temperature.

dt = T2 - T1

dt = 273 - 246

dt = 27 K

Substituting the values into the equation, we have;

Q = 2.6*2060*27

Q = 144612 Joules.

4 0
3 years ago
What are electrons and how are they involved in creating and electric current?
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Electrons are a stable sub atomic particle that has a negative charge and is found in all atoms and is the main carrier of electricity through solids.

In a metal, some of the electrons can escape from the atoms and are free to move around inside the metal. These electrons are referred to as 'conduction electrons'. 

<span>A current is a flow of charge. In metal a current is the flow of the conduction electrons through the metal. This can occur when connected to battery for example: The battery pumps the conduction electrons around the circuit. </span>

6 0
3 years ago
Which describes the difference between a bowling ball sitting in the rack waiting to be used and the bowling ball knocking pins
777dan777 [17]
The answer is A. In the rack, the bowling ball has only potential energy. As it knocks pins down, its potential energy has decreased, while its kinetic energy has increased.
7 0
4 years ago
Read 2 more answers
What is the form of energy that is produced in all energy transformations?
Damm [24]

Answer: Long Answer...

Explanation: Most of the time, chemical energy is released in the form of heat, and this transformation from chemical energy to heat, or thermal energy, is called an exothermic reaction. Next, there are two main types of mechanical energy: kinetic energy and potential energy.

5 0
3 years ago
What challenges do scientists face in studying the Sun?
12345 [234]

Answer:

Explanation:

The sun sends out solar wind constantly - charged particles that can degrade visual sensors and the skin of spacecraft, and the occasional blast of a solar flare, which can send out clouds of charged ions that can disrupt communications and electronics on board probes and satellites.

Hope this Helps <3

4 0
3 years ago
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