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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Which graph best represents the relationship between the electric current and the rate at which a magnet is turning inside an electric generator?

The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.0 × 10-6 c/m2. (a) what is the magnitude of the electric field within the cell membrane? (b) find the magnitude of the electric force that would be exerted on a potassium ion (k+; charge = +e) placed inside the membrane.

At an oceanside nuclear power plant, seawater is used as part of the cooling system. this raises the temperature of the water that is discharged back into the ocean. the amount that the water temperature is raised has a uniform distribution over the interval from 10° to 25° c. what is the standard deviation of the temperature increase?