1) 0.1 kWh
Explanation:
The power of the lightbulb is:
The energy used by the lightbulb is equal to the product between the power (P) and the time (t):
Since the bulb has been left on for t = 1 h, the total electrical energy used is
2) $ 0.018
Explanation:
The company charges $0.18 per each kilowatt-hour. So, we can find the total cost charged for using 0.1 kWh of electricity by setting the following proportion:
$0.18 : 1 kWh = x : 0.1 kWh
And solving for x, we find
Answer:
so gravity will be same as that of surface of earth
Explanation:
As we know that the acceleration due to gravity is given as
here we have
we know that for earth we have
now if the radius and mass is given as above
so gravity will be same as that of surface of earth
Answer:
The location is at (3.535, 1.162) m
Solution:
As per the question:
Mass of the projectile, m = 9.6 kg
Initial velocity, v = 12.4 m/s
Angle,
Mass of one fragment, m = 6.5 kg
Time taken by the fragment, t = 1.42 s
Height of the fragment, y = 5.9 m
Horizontal distance, x = 13.6 m
Now,
To determine the location of the second fragment:
Horizontal Range,
Time of flight, t' =
Now, for the fragments:
Mass of the other fragment, m' = M - m = 9.6 - 6.5 = 3.1 kg
Distance traveled horizontally:
Distance traveled vertically:
Now,
x' = 3.535 m
Similarly,
The location of the other fragment is at (3.535, 1.162)