The question is going along fine, and then suddenly "groups of two" get thrown in. What that means is not clear at all.
Here's a solution assuming that 8 heater wires are all in parallel:
-- The resistance of each wire is 4 ohms.
-- If eight resistors, each 4 ohms, are in parallel, the <em>total resistance is 0.5 ohm.</em>
-- Current = (voltage)/(resistance)
Current = (12 volts) / (0.5 ohm)
<em>Current = 24 Amperes.</em>
Power dissipated by the heater = (voltage) x (current)
Power = (12 volts) x (24 Amps) = 288 watts, a nice toasty heating pad.
Answer:
I believe it would be D).3 x 10 to the 9th power
Explanation:
Answer: The distance between the man and the plane increasing at a rate of 400ft/s
Explanation: Please see the attachments below
Answer:
<em>The correct option is 1. 720 m</em>
Explanation:
<u>Projectile Motion</u>
When an object is launched in free air (no friction) with an initial speed vo at an angle , it describes a curve which has two components: one in the horizontal direction and the other in the vertical direction. The data provided gives us the initial conditions of the survival package's launch.
The initial velocity has these components in the x and y coordinates respectively:
And we know the plane has an altitude of 600 m, so the package will reach ground level when:
The vertical distance traveled is given by:
We'll set up an equation to find the time when the package lands
Solving for t, we find only one positive solution:
The horizontal distance is:
The correct option is 1. 720 m