Questions in Grade High-school

Questions in Grade High-school

[Homework Help] How are airplanes artificially pressurized?

[Homework Help] What is ethane?

[Homework Help] How do I stargaze?

[Homework Help] Compare the various effects that alcohol has on the mind and body at two different blood alcohol concentrations.

[Homework Help] Your oven has a power rating of 5000 watts. a. How many kilowatts is this? b. If the oven is used for 2 hours to bake cookies, how many kilowatt-hours (kWh) are used? c. If your town charges $0.15/kWh, what is the cost to use the oven to bake the cookies?

[Homework Help] How do you convert mol dm\(^{-3}\) to g dm\(^{-3}\) and vice versa?

[Homework Help] Can we store electricity from lightning?

[Homework Help] If a baking tray is 700 mm by 600 mm, how many circles with a diameter of 25 cm can fit into the baking tray?

[Homework Help] What are some of the most common energy sources?

[Homework Help] Solve the simultaneous equations: \[ 2x + 3y = -3 \] \[ 3x - 2y = 28 \]