Actual velocity of the ping-pong ball= 5 m/s
Explanation:
velocity of ping pong ball because of the shot gun= 4 m/s North
velocity added to the ping-pong ball due to the wind=3 m/s
These velocities are perpendicular to each other. so we use Pythagoras theorem to find the resultant velocity of the ping- pong ball
so the actual velocity of the ping-pong ball =V= √4²+3²
V= √25
V= 5 m/s
Answer: A
Explanation: Since particles in solids are more tightly bound together than the particles in gases, mechanical waves can propagate more quickly through solids. ... Since electromagnetic waves do not require a medium to pass through, they are faster in matter that has fewer particles.
Answer:
B) the potential drop is always the same across each resistor
Explanation:
Resistors are said to be in parallel if they are connected in different branches, and the end of each branch corresponds to the end of the other branches: so that, they are connected to points at same voltage. So, resistors in parallel have the same potential drop across them.
Therefore, we can analyze each statement:
A) the largest resistance has the largest current through it. --> FALSE. The current through each resistor is given by Ohm's law:
where V is the potential drop and R the resistance. As we see, since the voltage is constant, the larger the resistance, the less the current.
B) the potential drop is always the same across each resistor. --> TRUE, for what we said above.
C) the same current always runs through each resistor. --> FALSE, for what we said in part A.
D) the power generated in each resistor is the same. --> FALSE. The power dissipated in each resistor is
where V is the voltage and R the resistance; the voltage is the same for all resistors, however the resistance is not, so the power dissipated is not the same.
Answer:
Potential energy is stored energy that is stationary. Kinetic energy is energy in motion
Explanation:
Examples:
A car moving forward down a hill is kinetic energy
A car about to go down a hill after reaching the top is potential energy.
Hope I helped :)
The closest refractive index to the one observed is that of rayon, about 1.51. Therefore, the fiber is likely from the suspect's shirt.