Let denote the position vector of the ball hit by player A. Then this vector has components
where is the magnitude of the acceleration due to gravity. Use the vertical component to find the time at which ball A reaches the ground:
The horizontal position of the ball after 0.49 seconds is
So player B wants to apply a velocity such that the ball travels a distance of about 12 meters from where it is hit. The position vector of the ball hit by player B has
Again, we solve for the time it takes the ball to reach the ground:
After this time, we expect a horizontal displacement of 12 meters, so that satisfies
It’s c
Explain. Just know it’s c because suspended scaffolding is on the top list of the other answer choices trust me
Scientists need creativity because, Scientists use creativity to decide which smaller questions are probably to yield results, consider feasible solutions to their questions, and devise approaches to check the ones solutions.
Answer:
See the answers below.
Explanation:
The total power of the circuit is equal to the sum of the powers of each lamp.
Now we have a voltage source equal to 240 [V], so by means of the following equation we can find the current circulating in the circuit.
where:
P = power [W]
V = voltage [V]
I = current [amp]
So this is the answer for c) I = 0.67 [amp]
We know that the voltage of each lamp is 240 [V]. Therefore using ohm's law which is equal to the product of resistance by current we can find the voltage of each lamp.
a)
where:
V = voltage [V]
I = current [amp]
R = resistance [ohms]
Therefore we replace this equation in the first to have the current as a function of the resistance and not the voltage.
b)
The effective resistance of a series circuit is equal to the sum of the resistors connected in series.
Answer:
The Andrews is A. 90km
Explanation: so far 1cm is equal to 45km on the map. That Means that a unit distance on the map is actually 4, 500, 000units (i.e 45 x 1000 x 100) in real life.
So if 1 cm represents 45km
2cm will represent 2 x 45km which gives 90km.