Answer:
72 km
Explanation:
We are given that
John marker reads=239 km
John travels and reaches the marker=149 km
John retraces his path and reaches the marker=167 km
We have to find the John's resultant displacement from 239 km.
Displacement:The displacement is the distance between two positions.
By definition of displacement
John's resultant displacement from 239 km=239-167
John's resultant displacement from 239 km=72 km
Hence, John's resultant displacement from 239 km=72 km
Answer:
Einstein had realized in 1905, that space and time, are intimately connected with each other. ... Thus one can think of space and time together, as a four-dimensional entity, called space-time. Each point of space-time is labeled by four numbers, that specify its position in space, and in time.
Explanation:
Answer:
answer is 18.6111
you can easily convert km/hr into m/s
just divide it by 3.6
Answer:
its surface temperature = 54.84 ° C
Explanation:
The density of aluminium 
= 2700 kg/m ³
Heat capacity 
= 897 J/Kg.K
radius of the sphere (r) = 0.081029 m
= 25 °C
= 124.978 °C
time (t) = 767.276 s
Using the formula :
where.
Replacing our values ;we have:
T ≅ 54.84 ° C
Therefore, its surface temperature = 54.84 ° C
