Answer:
The velocity of the boy and the skateboard is 24
Answer:
A closed system.
Explanation:
The three major types of system are: open, closed and isolated. Open system interacts with its surroundings with respect to its particles and energy. A closed system interacts with its surroundings with respect to energy but not its particles. While an isolated system does not interact with its surroundings in any way.
Therefore, after the jar is sealed, it is an example of a closed system. This is because the emitted gas could not escape into the surroundings, but thermal energy was emitted into its surroundings after the chemical reaction has taken place.
You are given
the mass of an object which is 3.00 kilograms. Also, you are given the energy
exerted by the object at 300 Joules. You are required to find the height or
distance travelled by your object. You need to know that potential energy is
equal to the mass times the gravitational force times the height of the object.
Let us denote P as our energy, m as the mass of the object, g as the
gravitational force and h as the height. So,
P = mgh
h = P/mg
h = (300 J)/(3kg)(9.8066
m/s2)
<u>h = 10.2 m</u>
Answer:
In the wild, clownfish rarely leave their anemone home. In fact, part of its purpose is to defend the anemone from other fish. However, clownfish bred in aquariums (without an anemone home) may still have this instinct, but it’s much calmer than wild harvested species.
Explanation:
Answer:
Explanation:
Given
two holes are made with different sizes
Hole 1 is large in size and hole 2 is small
If the volume flow rate of water is same for both the hole then small hole must be below the large hole because for same flow rate, velocity of water is large while cross-sectional area is small so it compensate to give same flow for both the holes.
Now for radius apply Bernoulli's theorem at hole 1 and 2
if hole 1 is h distance below water surface then
and
Also
and
thus