Here are some examples of statements that accurately describe matter:
Matter makes up everything in and on the earth
Nothing can create or destroy matter
The matter is made up of atoms, atoms cannot be divided
Hope this helped!
Newton taught us: Force = (mass) x (acceleration)
Divide each side by (mass) : Acceleration = (force) / (mass) .
The only problem here is: This formula applies when the "Force" is the
only force on the object. When the objects in these school problems are
falling out of airplanes, shot from guns, or being hit by baseball bats, we
routinely ignore the force of air resistance against the object. We're
comfortable with that, maybe because it's become a habit. But now,
we're not so comfortable about ignoring the force of water resistance.
All I can tell you is that if you DO ignore the water resistance, that is,
if the water were not there, her acceleration would be
(250 newtons) / (70 kg) = 3.57 m/s² = about 0.36 g .
But what is it really, in the water ?
If you've spent any substantial amount of time anywhere near competitive
swimmers, then you know that it depends on their position coming off the
wall, what they do with their knees and knuckles, how straight they hold
their body, how deep the texture of their swim-cap is, and how well they've
shaved their legs.
Answer:
160N
Explanation: When 80kg mass is one group . It's reaction force acting on a ground.
Weight of the object = 80*10
= 800 N
Here we are given cofficient of static friction its 0.2. It should be smaller than 1
Friction force = Reaction * Friction Cofficient
Reaction = 800N ( Considering Vertical Equilibrium )
F = 800* 0.2
F = 160N
<u>Answer</u>
46,200 J
The energy of given out when a substance is losing heat is given by:
H = mcΔθ
Where m is the mass of the substance,
c is the specific heat capacity of the substance and
Δθ is the temperature change.
H = 0.50 × 22 4200
= 46,200 Joules.
It is d because albert einstein was physics scienctist
