Explanation:
Below is an attachment containing the solution.
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.
Answer:
Explanation:
An object is drop from a height, then it is in direction of gravity
g is +ve
When an object drop from a height, the initial velocity is 0,
U=0
Given that h=4.4×10^7m
V=?
g=9.81m/s^2
Then using equation of motion
V^2=U^2+2gh
V^2=0+2×9.81×4.4×10^7
V^2=86.33×10^7m/s
Take square root of both side
V=29381.63m/s
Now to km/s, divide by 1000
Since 1km=1000m
V=29.38km/s
Answer:
Mass of the man = 100 kg
Explanation:
Given that,
Mass of the Earth, M = 6×10²⁴ kg
The radius of the Earth, r = 6400 km
Force on man, F = 977 N
We need to find the mass of the man. Let the mass of the man be m. The gravitational force acting between two objects is given by :
or
m = 100 kg
So, the mass of the man is 100 kg.
4/3 pi (radius)^3
If the radius is in cm the volume will be in mL
