Answer:
I would say the net force acting on the car is in the opposite direction of the car's motion is correct
BECUASE there are many subjects and to much pressure on the kids and sometimes learn things we don’t need to know
Answer:
1.The temperature of each sample will increase by the same amount
Explanation:
This is because, since their specific heat capacities are the same and we have the same mass of each substance, and the same amount of energy due to heat flow is supplied to both the glass and brick at room temperature, their temperatures would thereby increase by the same amount.
This is shown by the calculation below
Q = mcΔT
ΔT = Q/mc where ΔT = temperature change, Q = amount of heat, m = mass of substance and c = specific heat capacity of substance.
Since Q, m and c are the same for both substances, thus ΔT will be the same.
So, the temperature of each sample will increase by the same amount
If the atom is neutral, then the number of electrons will ALWAYS be the same as the number of protons (which is the atomic number), so in this case the number of protons is 16, and that make the number of electrons 16
Force = (mass) x (acceleration)
= (275kg) x (-4.5 m/s²) = -1,237.5 newtons.
In order for this mass to experience acceleration of -4.5 m/s²,
it must be pushed by -1,237.5 newtons of force, otherwise
it will not have that acceleration.
The plus and minus signs are completely your choice. The
positive direction is the direction you decided to call positive
when you started working with the problem. Chances are,
you probably called the positive direction the one in which
the object is already moving. That makes the acceleration
positive if the object is speeding up, negative if it's slowing
down.
If the acceleration is positive (speeding up), that means the
object is being pushed by a force in the same direction it's
already moving. If the acceleration is negative (slowing down),
that means the object is being pushed by a force opposite to
the direction it's already moving ... the negative direction.