Answer:
In physics, a force is any influence that causes an object to undergo a certain change, either concerning its movement, direction, or geometrical construction. In other words, a force can cause an object with mass to change its velocity, i.e., to accelerate, or a flexible object to deform, or both.
Explanation:
Answer;
B. Without good stability, athletes are too clumsy to perform well.
Explanation;
Stability refers to the resistance to both linear and angular acceleration, or resistance to disruption of equilibrium.
Developing and enhancing core strength and stability helps athletes to maximize their power output and enhance game day performance. Additionally, Improving core strength and stability can also help athletes reduce their risk of injury.
The answer is CFC – 22 or HCFC - 22. To locate leaks, it is
easily accomplished using a pressure – regulated dry nitrogen charge with CFC –
22. But some technicians prefer to use Refrigerant – 22 (HCFC – 22) to
pressurize the system without the use of nitrogen. CFC – 22 is also known as Chlorodifluoromethane.
This is a hydrochlorofluorocarbon (HCFC). This is better recognized as HCFC-22, or R-22. It is usually
used as a propellant and refrigerant. While HCFC
– 22 is also known as class II hydrochlorofluorocarbon refrigerant that is less
harmful to the ozone than R -12. If HCFC – 22 is used for leak testing, all
refrigerant must be first detached from the system. After the leak test, HCFC –
22 should be remove before putting any other refrigerant. Do not mix refrigerants.
Both HCFC – 22 and R -134a fall into the kind of refrigerants known as
combustible. If exposed to oxygen, they will burn when under pressure or
exposed to high temperatures.
The law of conservation of energy states that the energy cannot be created or destroyed, either it is transferred from one object to another.
Explanation:
The principle of conservation of energy is the energy is not created or destroyed it is only moved from one place to another.
There are various examples to explain the conservation of energy. some of them are explained here.
- If the moving car hits the parking car and that makes the parked car to move, at this state the energy is transferred from the moving car to the parked car.
- If you are pushing a book across the table, then the energy from your moving arm is transferred from your body to the book and that causes book to move.
- The another example for conservation of energy is A dog is running towards the tree and it gets hit to it. In this case the energy is transferred from moving dog to the tree, and causes the tree to move.
Answer:
5.49×10⁻⁴ lbm
Explanation:
Convert volume to m³.
V = (200 cm³) (1 m / 100 cm)³ = 0.0002 m³
Find mass in kg.
m = ρV
m = (1.24507 kg/m³) (0.0002 m³)
m = 0.000249 kg
Convert mass to lbm.
m = (0.000249 kg) (2.205 lbm/kg)
m = 0.000549 lbm
m = 5.49×10⁻⁴ lbm
