Answer:
The distance the log has moved by the time Ernie reaches Bur is 1.33 m.
Explanation:
give information:
The log is 3.0 m long and has mass 20.0 kg.
Burt has mass 30.0 kg; Ernie has mass 40.0 kg
Ernie has mass 40.0 kg.
to find the distance, first, we have to calculate the center of mass
X = ∑ m x /∑m
= (20 x (3/2)) + (30 x 0) + (40 x 3)/ (20+30+40)
= 150/90
= 5/3
when Ernie walk, the center of the mass is
X = (70 x 0) + (20 x (3/2))/(70 + 20)
= 30/90
= 1/3
the distance of log moved = 5/3 - 4/3 = 1.33 m
The power dissipated by a resistor is
where I is the current, V the voltage and R the resistance.
We can see that if the voltage V is doubled and R is kept fixed, the new dissipated power is
so, it quadruples.
Answer:
1.22 m/s
1.76 m/s
0
1.46 m/s
Explanation:
*in the first part i have taken 26 m as in the part above it is mentioned distance is 26 m.
= Displacement of the first run = 26 m
= Displacement of the second run = 26 m
= Time taken on the first run = 20.7 s
= Time taken on the second run = 14.8 s
Velocity is given by
Average velocity of the first run is 1.22 m/s
Average velocity of the first run is 1.76 m/s
Displacement for the round trip is 0 as she started and ended at the same point so her average velocity for the round trip is 0 m/s.
Average speed is given by
The average speed for the round trip is 1.46 m/s.
a rabbit runs away from a fox that is chasing it is external stimuli
Thirst and hunger are internal stimulation caused by hypothalamus of human brain
Yawning is a process occuring due to low oxygen levels in the blood which is also internal factor