distance d = 5 km = 5 x 1000 m = 5000 m
time taken = 25 minute = 25 x 60 sec = 1500 sec
average velocity V = d/t
V = 5000/1500
V = 3.33 m/s towards east
Answer:
Infra red waves, visible light waves,
Explanation:
Answer:
When boiling water is poured into a thick tumbler its inner surface expands. However, due to low thermal conductivity of glass, the expansion of outer surface of the tumbler is quite small. Due to uneven expansion of the outer and inner surfaces, the tumbler breaks.
Explanation:
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Answer:
True
Explanation:
A neutral object is an object whose net charge is zero, so the sum of the positive charges is equal to the sum of negative charges:
If the neutral object develops an electric charge (= different from zero), it means that this balance has changed. In particular, usually electric charge is carried by electrons (negative charges), so the object has either gained or lost electrons.
In particular:
- if the object has gained electrons, it has became negatively charged
- If the object has lost electrons, it has became positively charged