Because it has not been proven. We have no evidence that the big bang happened.
Answer:
The average speed of the cyclist is 17.14 km/hr
Explanation:
Given;
total distance traveled by the cyclist's, d = 60 km
time taken by the cyclist, t = 3.5 hours
The average speed of the cyclist is given by;
average speed = total distance traveled / total time taken
average speed = 60 km / 3.5 hr
average speed = 17.14 km/hr
Therefore, the average speed of the cyclist is 17.14 km/hr
Answer:
The radius of the sphere is 4.05 m
Explanation:
Given;
potential at surface,
= 450 V
potential at radial distance,
= 150
radial distance, l = 8.1 m
Apply Coulomb's law of electrostatic force;


Therefore, the radius of the sphere is 4.05 m
Answer:
Explanation:
In the calculation of distance we do not take into account the direction of movement .So only magnitude of movement is taken care of.
On the other hand , in respect of displacement , we take into account even direction of movement along with magnitude.
Distance covered by flea = 45 - 27 = 18 cm
Displacement by flea = 27 - 45 = - 18 cm
Speed = Distance covered / time
= 18 / 3 = 6 cm / s
Velocity = - 18 / 3 = - 6 cm /s.