Answer:we can calculate the answer by the following formula;
Explanation:
<span>The amount of energy required to raise the
temperature of 1 kilogram of a substance by 1 Kelvin is called the specific
heat. The answer is a. For example, water. Water has a specific heat of 4.18
Joules per kilogram per Kelvin. This means that in order for water to change from
one state to the other at one kelvin, it needs 4.18 Joules of energy per one
kilogram of water. But it does not apply to changes in phase, because the heat
added or removed during a phase change does not change the temperature of a
substance.</span>
Answer:
Speed of astronaut = 38.34 m/s
Explanation:
Centripetal acceleration is given by the expression, , where v is the velocity and r is the radius.
Here centripetal acceleration is given, radius is given, we need to find velocity.
Centripetal acceleration = 98 m/s²
Radius = 15 m.
We have,
Speed of astronaut = 38.34 m/s
Retrograde. Planets seem to move forward and then backward sometimes. This is really because we pass them as we move in our orbit but astronomers wanted to try to describe the solar system with earth at the center so elaborate models were employed.
Answer:
Explanation:
Given:
- power of battery,
- voltage across the load resistor,
- emf of the battery,
<u>Now as we know that the electric power is given as:</u>
here: resistance of the load
a)
Now the load resistance:
b)
Using Ohm's law, current in the load:
Now,
where: internal resistance