The blade of a windshield wiper moves through an angle of 180.0 degrees in 0.500 s. The tip of the blade moves on the arc of a circle of radius of 0.520 m. What is the magnitude of the centripetal acceleration of the tip of the blade

Centripetal acceleration will be equal to

Explanation:

We have given time taken to cover 180° is 0.5 sec

So time taken by 360° is equal to = 2×0.5 = 1 sec

Radius of the circle r = 0.520 m

So distance

So velocity

We have to find the centripetal acceleration

Centripetal acceleration will be equal to

So centripetal acceleration will be equal to

explanation:

specific heat is the amount of heat required to raise the temperature of a unit mass of a substance.

answer: 2×10^-2kg

explanation: density= mass per volume

vol=mass/density

converting to s.i units we have;

3÷1000kg = 0.003

1.5÷100m = 0.15

0.003/0.15 = 0.02kg