1. In a science lab there are three petri dish. The first dish contains 2.75 × 10^8 bacteria, the second dish contains 6.12 × 10^5 bacteria and the third contains 8.345 × 10^6 bacteria. In standard form, state how much bacteria is there in the petri dish in total? 2. An asteroid was 3.5 × 10^11 metres away from Earth. It is now 9.391 × 10^8. How far away is it now?

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Why does the equilibrium position of the spring change when a mass is added to the spring? will the mass oscillate around the new equilibrium position of the spring or the previous position without a mass attached to the spring? if the equilibrium position of the spring changes by 20 cm (assuming no initial mass) when a mass is added to the spring with constant 4.9 kg/s^2, what is the mass of the object attached to the spring?

Asmall electric heater, immersed in 80g of water in a calorimeter of 40j/k raises the temperature from 10.5 degree celsius to 25 degree celsius in 12 minutes. using the same apparatus with 50g of oil instead of water, it is found that the temperature of oil rises from 7 degree celsius to 27 degree celsius in 10 minutes. find specific heat capacity of the oil.

Two point charges are separated by a certain distance. how does the strength of the electric field produced by the first charge