ALWAYS use significant figure rules. Remember that these rules apply to all numbers that are measurements.
In working this problem, assume the value of "g" to be 9.8 m/s2 with two (2) significant digits unless
otherwise stated.
A mass of 2700 kg is raised 2.0 m in 10 seconds. What is the potential energy of the mass at this height?

A.39,000
B.3,900
C.0

52920 Joules

Explanation:

This is a case of gravitational potential energy...

We can apply the equation for gravitational energy as P = mgh, where m = mass of object, g = acceleration due to gravity, h = height. Let us substitute the known values into this formula and solve for P, the potential energy.

The mass of the object is given to be 2700 kg, raised to a height of 2.0 meters. The time is not needed in this case, but we know that the acceleration due to gravity is a constant - 9.8 m / s,

P = ( 2700 kg )( 9.8 m / s )( 2 m ),

P = 52920

This doesn't match the given options, so please let me know if you have the right question / options at hand.

continuous conducting path for current, power supply

electrical potential energy =0.072 j

explanation:

electrical potential energy is given by

u= q δv

q= charge=6 c

δv= potential difference and is given by

δv= e d

e= electric field

d= distance=5 mm=0.005 m

δv=2.4 (0.005)=0.012 v

now electric potential energy= u= q δv

u=6 (0.012)

u=0.072 j