Answer:
a = 0.01m/s²
Explanation:
V_f = V_0+a*t
V_f = Velocity final
V_0 = Velocity initial
a = acceleration
t = time
a = (V_f-V_0)/t
a = (540m/s-240m/s)/((8hr)*(60min/1hr)*(60s/1min))
a = 0.01m/s²
Answer:
b. 46 km/hr
Explanation:
Applying,
S' = d'/t'................... Equation 1
Where S' = Average speed of the bus, d' = Total distance covered by the bus, t' = Total time taken.
From the question,
d' = (100+55+75) km = 230 km
t' = (2+1+2) = 5 hours
Substitute these values into equation 1
S' = 230/5
S' = 46 km/hr.
Hence the correct option is b. 46 km/hr
Answer:
A. Thermal energy;
Thermal energy is energy that comes from a substance whose molecules and atoms are vibrating faster due to a rise in temperature.
Answer:
200 W
Explanation:
The power is given by the ratio between the amount of work done and the time taken to perform the work:
where in this problem we have
W = 2600 J is the work done
t = 13 s is the time taken to do the work
Substituting the numbers into the equation, we find
