Answer:
a. 4
Explanation:
Hi there!
The equation of kinetic energy (KE) is the following:
KE = 1/2 · m · v²
Where:
m = mass of the car.
v = speed of the car.
Let´s see how would be the equation if the velocity is doubled (2 · v)
KE2 = 1/2 · m · (2 · v)²
Distributing the exponent:
KE2 = 1/2 · m · 2² · v²
KE2 = 1/2 · m · 4 · v²
KE2 = 4 (1/2 · m · v²)
KE2 = 4KE
Doubling the velocity increased the kinetic energy by 4.
Answer: 0.36 m
Explanation:
By definition, the x coordinate of the center of mass of the system obeys the following equation:
Xm = (m1x1 + m2x2 + …….+ mnxn) / m1+m2 +……+ mn
Neglecting the mass of the rod, and choosing our origin to be coincident with the location of the full bucket, we can write the following expression for the X coordinate of the center of mass (Assuming that both masses are aligned over the x-axis, so y-coordinates are zero):
Xm = 0.25 mb . 1.8 m / (1+0.25) mb
Simplifying mb, we get:
Xm= 0.36 m (to the right of the full bucket).
A) The acceleration of this car is zero
Because, the question states that it is traveling at a constant velocity, meaning that it has no acceleration at all.
Answer:
8.46 N/C
Explanation:
Using Gauss law
Gauss's Law states that the electric flux through a surface is proportional to the net charge in the surface, and that the electric field E of a point charge Q at a distance r from the charge
Here, K is Coulomb's constant whose value is 
r = 0.43 + 0.106 = 0.536 m
If 'C' and 'R' represent capacilance and resistance respectively then the dimensions of RC are:
A:M^0L^0T^2
B:M^0L^0T^1
C:Ml^1
D:Ml^-1T^2
E;None of these
