Explanation:
Two objects that only have the force of gravity acting on them, will fall with the same acceleration <span>g=9.8<span>m<span>s2</span></span>; g=32.2<span><span>ft</span><span>s2</span></span></span> and will therefore hit the ground at the same time.
When you drop a feather, air resistance acts on all the surfaces of the feather. This causes the feather to slow down.
Air resistance depends on two factors: the speed of the object (increased for example by throwing it), and its surface area.
hope this can give u a little bet more to know about how to get ur answer :P
have a gud day and gud luck!
Answer:
20min = 20 × 60 = 1200sec.
Speed in m per sec.
V = 1000/1200
V = 0.833m per sec.
Explanation:
Many plutons clump together as they grow through the crust.
Answer:
Explanation:
a )
Reaction force of the ground
R = mg
= 160 N
Maximum friction force possible
= μ x R
= μ x 160
= .4 x 160
= 64 N .
b )
160 N will act at middle point . 740N will act at distance of 3 / 5 m from the wall ,
Taking moment about top point of ladder
160 x 1.5 + 740 x 3/5 + f x 4 = 900 x 3
240 + 444 + 4f = 2700
f = 504 N
c )
Let x be the required distance.
Taking moment about top point of ladder
160 x 1.5 + 740 x 3 x / 5 + .4 x 900 x 4 = 900 x 3 ( .4 x 900 is the maximum friction possible )
240 + 444 x + 1440 = 2700
x = 2.3 m
so man can go upto 2.3 at which maximum friction acts .
Answer:
Arranging the events of the earliest stellar formation in sequential order, we get -
3. The big bang occurs. --> 2. Pockets of elements in higher concentrations begin experiencing greater gravitational force. --> 1. Hydrogen atoms shed their electrons and fuse together to form larger helium atoms. --> 4. Hydrogen and helium disperse into the universe in uneven concentrations. --> 6. The gas clouds begin reducing in volume, which leads to increases in density, pressure, and temperature. --> 5. The temperature of gas clouds surpasses 14 million Kelvin.
Correct Order : Option 3, 2, 1, 4, 6, 5
Explanation:
The evolution in Stellar is the process of evolution through which a star which the stellar body changes its morphology over the course of time. All stars being the stellar body are created from collapsing clouds of gas and dust. These collapsing cloud of gas and dust are called nebulae or molecular clouds.
The collapse occurs with gravitational collapse of cool, dense molecular clouds. When the cloud collapses, fragments are formed of smaller regions. These fragments then contract to form stellar cores.