Answer:
t = 0.0689 s
Explanation:
Given that,
Mass of a basketball, m = 0.622 kg
Initial velocity, u = 4.23 m/s (downward or negative)
Final velocity, v = 3.85 m/s (up of positive)
Average force, F = 72.9 N
We need to find the time it was in contact with the floor. The force is given by :
So, the time of contact is 0.0689 s.
Answer:
The value is 
Explanation:
From the question we are told that
The temperature is 
Generally the root mean square speed of the oxygen molecules is mathematically represented as
Here R is the gas constant with a value 
M is the molar mass of oxygen molecule with value 
So
=>
Answer:
Total time = 20 hours
Explanation:
Half life is the amount of time it takes for a substance to decay tohalf of it's original amount.
Half life = 5 hours.
We have to obtain the number of half lives to get the time required.
1st half life = 1/2
2nd half life = 1/4
3rd half life = 1/8
4th half life = 1/16
So ffour half lives.
Total time = number of half lives * Time of half life
Total time = 4 * 5
Total time = 20 hours
? Combustion is a chemical change in matter, being caused by reactions with oxygen and some type of burnable material.
Supporting combustion is a chemical property
Answer:
How does energy travel?
One way the energy can travel is through radiation. An object can radiate energy in the form of electromagnetic waves, for example when a strong light is turned on and you can feel some heat coming from it, or when you walk under the sunlight and you can feel the heat in your skin.
Where is the initial source of energy in our solar system?
In the solar system, the source of energy comes from the Sun, and the sun irradiates that energy to all the nearby objects.
What is the process that gives off energy from the sun called?
The process is called radiation, this is all the energy that comes from the sun in the form of different electromagnetic waves (light in the visible range, UV rays, etc...)
