30° 60 20 70 7 An ex What will the magn Angle of incidence Angle of rellection Complete this diagram and provide labels. 12 What conclusion can be drawn about the angle of incidence and the angle of rele 13 1.4 Describe the following terms: 141 normal; 130 PHYSICS texthool Grade 11 Physical science
What can happen to light when it falls on an object?
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Which is not a step in the rock cycle?

Awater balloon launcher uses an elastic band with a spring constant of 115 n/m to use thee launcher you stretch thee band back with a balloon n it the water balloons have a mass of 1.3 kg a) if you stretch the band by 0.8 m, what elastic force will the band exert? b) with the band stretched 0.8 m, how much elastic potential energy is stored in the spring? c) if you release the band, it pushes forward. what is the kinetic energy of the balloon when it reaches the natural length of the band? d) what is the speed of the balloon when it reaches the natural length of the band?

In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?