When an alkali metal is involved in a chemical reaction with a nonmetal, what charge will its atoms most likely form? 1- 2- 2+ 1
1 answer:
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Answer:
<h2><u>Rheostat:</u></h2>=> Rheostat is an electric device used as a variable resistance, like the regulator of the fan. It is used to change the electric resistance in the electric circuit.
<h2><u>Principle / Rule:</u></h2>=> Rheostat works on the principle of Ohm’s law. Ohm’s law states that current in a circuit is inversely proportional to the resistance at the given temperature.
Answer:
(a). The ball's centripetal acceleration is
(b). The magnitude of the net force is 232.9 N.
Explanation:
Given that,
Mass of baseball = 144 g
Speed = 81 mph = 36.2 m/s
Distance = 81 cm
(a). We need top calculate the ball's centripetal acceleration just before it is released
Using formula of centripetal acceleration
Where, v = speed
r = radius
Put the value into the formula
(b). We need to calculate the magnitude of the net force that is acting on the ball just before it is released
Using formula of force
Put the value into the formula
Hence, (a). The ball's centripetal acceleration is
(b). The magnitude of the net force is 232.9 N.