Chemistry, 11.03.2020 01:37 leommarcoantonio

Free fall is a situation in which the only force acting upon an object is gravity. Why do all objects in free fall have
the same acceleration?

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Answer from: blahhhhhhh10

Because the acceleration due to gravity does not depend on the mass of the object

Explanation:

An object is said to be in free fall if there is only one force acting on it: the force of gravity, whose magnitude is

F=mg

where

m is the mass of the object

g=9.8 m/s^2 is the acceleration due to gravity

From the formula, we observe that the force of gravity acting on an object depends on its mass. However, its acceleration does not. In fact, according to Newton's second law of motion, the net force acting on an object is equal to the product between its mass and its acceleration:

F=ma

where a is the acceleration. By combining the two equations, we get:

$ma=mg\\\rightarrow a = g$

which means that the acceleration of any object in free fall is equal to , the acceleration due to gravity, because it does not depend on the mass of the object.

Answer from: Quest

a mercury barometer is a device that uses the physical properties of mercury in a tube to measure barometric pressure. mercury barometers are used for : -

1. measurement of atmospheric pressure

2. determining the altitude of a place

3. weather forecasting

4. calibration and checking of aneroid barometers

5. application in fluid mechanics

6. measurement of pressure in aircrafts

7. surface weather analysis

8. preparation of barographs

9. usage in physical sciences like physics, astronomy & chemistry

10. preparation of aircraft altimeters

characteristics of mercury barometer : -

1.used to define and measure atmospheric pressure.

2.on the average at sea level the column of mercury rises to a height of about 760 mm.

3.this quantity is equal to 1 atmosphere.

4.it is also known as standard atmospheric pressure.

5.a barometer in which the weight of a column of mercury in a glass tube with a sealed top is balanced against that of the atmosphere pressing on an exposed cistern of mercury at the base of the mercury column, the height of the column varying with atmospheric pressure.

Write 15 uses of a mercury barometer along with its characterestics

Answer from: Quest

1= c 2= a or d3 = idk sorry 4= c5= c

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Free fall is a situation in which the only force acting upon an object is gravity. Why do all object...