It is C...........................................
Answer:
NO
Explanation:
Acceleration is change in velocityΔv in respect to timeΔt
so if the velocity of the car is greater than the truck it does not mean that the car acceleration is greater than the truck.
Sometimes with constant velocity it means no accelaration ,but the truck may have accelaration
so, higher velocity of the car does not mean higher acceleration
Salt is a compound, with the chemical name "Sodium chloride"
and the chemical formula NaCl.
Each molecule of salt is an atom of sodium electrically bound to
an atom of chlorine.
The chemical properties of salt are completely different from the
chemical properties of either element in its molecule. In fact,
sodium and chlorine are both toxic and corrosive, i.e., poison,
but as long as the salt is still salt, you can safely eat it !
There's nothing physical or mechanical, like spinning or filtering,
that you can do to salt to separate the sodium from the chlorine.
That takes electrical or chemical processes, and once you separate
them, you wind up with two substances that are both dangerous.
If you put salt into a jar with some sand and shake it up, then you
have a mixture. The salt is still salt and the sand is still sand, and
they can be separated quite easily.
If you put some salt in some water, and stir it up so that the salt
dissolves, then you have a salt solution. Some of the salt
molecules actually come apart in it, and there are sodium ions
and chlorine ions in the water. When that happens, the water
begins to conduct electric current very nicely, and if you DO
pass current through it, you get sodium collecting at the end
of one wire, and chlorine collecting at the other wire. But if you
just let it set there in the sun, or heat the solution on the stove,
then once the water evaporates, you have plain old salt again
in the jar.
i thinkits an instrument called seismograph. not sure
Answer:
most stubborn is Jill, F = 227.97 N and θ = 43º
Explanation:
As the forces give us we must use Newton's second law, in this case as the donkey does not move the acceleration is zero
Let's start by breaking down the forces
Jack
F1 = 97.3 i ^ N
Jill
F2 = 60.9 N
θ = 45º to the left
This angle measured from the positive part of the x axis is T ’= 90 + 45 = 135º
F2x = F2 cos (θ’)
F2y = F2 sin (θ’)
F2x = 60.9 cos (135)
F2y = 60.9 sin (135)
F2x = -43.06 N
F2y = 43.06 N
Jane
F3 = 159N
T = 45º
F3x = F3 cos θ
F3y = F3 sin θ
F3x = 159 cos 45
F3y = 159 sin 45
F3x = 112.43 N
F3y = 112.43 N
a) The most stubborn of the three must be the one who pulls in the opposite direction, bone Jill who is pulling to the left while the other two do it to the right
b) We perform the summary of the forces in each axis
X axis
Fx = F1 + F2x + F3x
Fx = 97.3 -43.06 +112.43
Fx = 166.67 N
Axis y
Fy = F2y + F3y
Fy = 43.06 + 112.43
Fy = 155.49 N
F = √ Fx²+Fy²
F = 166.67² + 155.49²
F = 227.97 N
We use trigonometry
tan θ = Fy / Fx
θ = tan⁻¹ (155.49 / 166.67)
θ = 43º
Regarding the x axis