Answer:
30000 J = 30 kJ
Explanation:
Kinetic energy is the energy possessed by a moving object solely due to its motion.
You can get the K.E. of an object using the equation,
K.E. =
So you get,
K.E. =
= 30000 J = 30 kJ
Answer:
b. The force exerted by the piston on the object is less than F because the piston is accelerating downward.
Explanation:
Given that object exerts a downward force F on the piston that accelerates the piston downward.
An object can accelerate if the net force acting on it is non-zero.
Here, the piston is acceleration in the downward direction, so the net for on the piston is in the downward direction.
Force due to object, F, is in the downward direction while the force exerted by the piston on the object is in the upward direction.
As the acceleration of the piston is in the downward direction, so the downward force is more.
Therefore, the force exerted by the piston on the object is less than F because the piston is accelerating downward.
Hence, option (b) is correct.
The main job of the lungs is to bring fresh air into your body when you breathe in and removing waste gases when you breathe out.
b is not right but thanks it still helped me a lot. i thank you tho
Answer:
q = 3.356×10^-6C
Explanation:
In a cube of air,the electric field is perpendicular to the top and bottom of the cube,the total reflux = reflux200 + reflux300
But reflux is given by:
Reflux= E×A = E×A cos theta.
Where theta is the angle between the area vector and the electric field.
Total reflux = E300×A cos180 + E200×A cos0
Total reflux = -E300A + E200A
Total reflux =A (E300-E200)
Total reflux is given by Guass's law = Total reflux =q/Eo
q=Eo×total reflux
q= EoA(E200-E300)q= (8.84×10^-12)(100)^2×(100-60)
q=3.356×10^-6C