B is the correct answer according to my calculations.
NONE of the choices is a correct answer.
Density is (mass) DIVIDED BY (volume).
The volume of the black cube is
2 x 2 x 2 = 8 cm^3
It's density is 48/8 = 6 gm/cm^3
The volume of the yellow cube is
3 x 3 x 3 = 27 cm^3
Its density is 135/27 = 5 gm/cm^3
The black one is denser because the RATIO of its mass to its volume is greater.
The cubes are made of different substances.
The density only depends on the substance. It doesn't matter HOW MUCH of the substance there is. It's the RATIO that counts.
The black one would be denser even if one cube or the other was the size of a supertanker.
Answer: 0.22
Explanation: Subtract 0.01kg from 0.23kg
Answer:
It will take for the lead car to stop.
Explanation:
<em>Stage 1</em>: The car moves at constant speed .
<em>Stage 2</em>: the car accelerates with (the negative sign means it's decelerating with respect to the direction is moving).
¿When will be the velocity be ?
From Kinematics:
So, if final velocity is
then,
⇒ ⇒ .
Answer:
2630250 N/C, horizontally left
0
1434.825 N/C, horizontally left
Explanation:
m = Mass of particle
u = Initial velocity =
v = Final velocity = 0
t = Time taken
s = Displacement = 3.5 cm
q = Charge of particle =
Force is given by
Acceleration is given by
Magnitude of electric field is 2630250 N/C
Direction is horizontally to the left
The angle counterclockwise from left is zero.
The time taken is
Acceleration is given by
Magnitude of electric field is 1434.825 N/C
Direction is horizontally to the left