orchidwhale325

Hello, can someone help me with this photosynthesis question? Thank you.

"What substances will be accumulating in the lighted region?"

 "What substances (besides light) do photosynthetic organisms need? Why haven’t they run out of those substances?"

Mutations in some land plants gave rise to vascular tissue. What advantages did these plants have compared with land plants that did not contain any vascular tissue

Hello, can someone please help me understand how to solve half-life problems? For example, Technetium-99 has a half-life of 4 hours. A person is given a 3.0-ng dose. How many nanograms will be present in the person 24 hours later?

Alternative A. Build a coal-powered generating facility at a cost of $20,000,000. Annual power sales are expected to be $1,000,000 per year. Annual operating and maintenance costs are $200,000 per year. A benefit of this alternative is that it is expected to attract new industry, worth $500,000 per year, to the region.

Alternative B. Build a hydroelectric generating facility. The capital investment, power sales, and operating costs are $30,000,000, $800,000, and $100,000 per year, respectively. Annual benefits of this alternative are as follows:

Heavy Artillery plc is a designer and manufacturer of custom motorcycle parts from their base in rural Derbyshire. The company’s main US customer has recently suggested that they will be prepared to pay a premium of 2% if Heavy Artillery will accept payment in USD rather than GBP.

You are given the following information

1. Value of order £100,000
2. US interest rate 6%
3. UK interest rate 2%
4. Payment terms 60 days
5. Today's spot rate is 1.550

Required

1. Assuming the 2% premium applies to the USD price as at today's exchange rate what are GBP proceeds from the deal in 60 days using the rate calculated in part 1)? If you were unable to calculate a rate in part 1) you can assume a rate of your choice, but you must clearly state your assumption.

          (Rate = 1.561)                                 

What is an NPN transistor?

Fluid with the viscosity of , is flowing in a pipe with the diameter of 35cm and velocity of . Calculate the head loss (m) for 100m of the pipe.