Answer:
Energy, E = 18 kJ
Explanation:
Given that,
Power of the lightbulb, P = 5 W
We need to find the electrical energy produced by the lightbulb in one hour. We know that electric power is given by the electrical energy produced per unit time.
1 hour = 3600 seconds
Electric power :
or
E = 18 kJ
So, 18 kJ of electrical energy a 5-W lightbulb convert to radiant and thermal energy in one hour.
<span>The nickel has a mass of approximately 0.005kg</span>
Answer:
34.45m
Explanation:
Using the equation of motion formula v² = u²+2as to get the distance travelled
v is the final velocity = 26m/s
u is the initial velocity = 0m/s
a is the acceleration due to gravity = 9.81m/s²
S is the distance travelled
Substituting the given values into the formula;
26² = 0²+2(9.81)s
676 = 0 + 19.62s
19.62s = 676
s = 676/19.62
s = 34.45m
Hence the distance she would travel during the race is 34.45m
Answer:
Explanation:
Given that,
The work function for silver is 4.73 eV.
We need to find the value of the work function from electron volts to joules.
We know that,
For 4.73 eV,
So, the work function for silver is 
.
