Answer:
Simply. It is their wish weather to sit or stand or crul or something
Explanation:
It is their wish to do their work
I'm going to make an assumption here. The speed of the wave is 343m/s = c.
The equation for speed of a wave is c = λf. λ: wavelength f: frequency
Substituting known values, we get 343m/s = λ(784Hz)
λ = 0.4375m
Answer:
v = -5 m/s
Explanation:
It is given that,
The initial velocity of the ball, u = 25 m/s
We need to find its velocity after 2 seconds in the air.
Let v is the velocity of the ball after 2 seconds. Using equation of motion to find it.
v = u + at
Here, a = -g
v = u -gt
Putting all the values,
v = 25 - (10)(3)
= 25-30
= -5 m/s
So, the velocity of the ball after 3 seconds is 5 m/s and it is in downward direction.
The metal will no longer give the correct temperature reading if we do not drip off the water before it is placed in the calorimeter.
Explanation:
- The calorimeter is a device used to measure the flow of heat from a chemical reaction or a physical change.
- A basic calorimeter is consists of a metal container of water above the combustion chamber. The process of measuring heat is called calorimetry.
- As soon as the water begins to boil the metal should be placed so that it can obtain a constant flow of thermal energy from the boiling water instead of placing the water in cold water receiving inconsistent temperature.
- When you remove the tube with a metal form from boiling water, you hesitate before dumping the metal, the metal will no longer be the temperature of boiling water.