Part A = 455.165 km

Part B = 8.9523 g

Part C = 3.1107 g

Consider a bird that flies at an average speed of 10.7 m/s and releases energy from its body fat reserves at an average rate of 3.70 W (this rate represents the power consumption of the bird). Assume that the bird consumes 4g of fat to fly over a distance d_{b} without stopping for feeding. How far will the bird fly before feeding again?

How many grams of carbohydrate m_{carb} would the bird have to consume to travel the same distance d_{b}?

Field observations suggest that a migrating ruby-throated hummingbird can fly across the Gulf of Mexico on a nonstop flight traveling a distance of about 800 km. Assuming that the bird has an average speed of 40.0 km/hr and an average power consumption of 1.70 W, how many grams of fat does a ruby-throated hummingbird need to accomplish the nonstop flight across the Gulf of Mexico?

Part A = 82.62 dollars

Part B = 3.2 Ω

On average, an electric water heater operates for 1.8 h each day.

If the cost of electricity is $0.34 kWh, what is the cost of operating the heater during a 30-day month?

What is the resistance of a typical water heater?

Part A = 12.5 A

Part B = 9.6 ohms

Part C = 16.1 minutes

A 1500-W heater is designed to be plugged into a 120-V outlet.

What current will flow through the heating coil when the heater is plugged in?

What is R, the resistance of the heater?

How long does it take to raise the temperature of the air in a good-sized living room (3.00m x 5.00m x 8.00m) by 10.0°C?

Part A = 5.3, 5.3, 11, 11 A

Part B = 11, 11, 21, 21 V

Part C = 550 W

Suppose that the resistor arrangement in the figure is connected to a 21 V battery.

What will be the current in each resistor?

What will be the voltage drop across each resistor?

What will be the total power delivered?

In the circuit in the figure, a 20-ohm resistor sits inside 103 g of pure water that is surrounded by insulating Styrofoam.

If the water is initially at temperature 11.7 °C, how long will it take for its temperature to rise to 57.3 °C?16

Part A = 0.5P_{0}

Part B = 2P_{0}

A single resistor is wired to a battery as shown in the diagram below. (Intro 1 figure) Define the total power dissipated by this circuit as P_{0}.

Now, a second identical resistor is wired in series with the first resistor as shown in the second diagram to the left (Intro 2 figure).

What is the power, in terms of P_{0}, dissipated by this circuit?

The second resistor is now removed from the circuit and rewired in parallel with the original resistor as shown in the schematic to the left (Intro 3 figure)

What is the power, in terms of P_{0}, dissipated by this circuit?