Question 4 (1 point) A bike is sitting at the top of a hill that is 21 meters high. The bike has a mass of 0.200 kilograms. The bike has potential energy. Calculate it.
• A bike is sitting at the top of a hill that is 21 m high. The bike has a mass of 0.200 kilograms. The bike has
energy. Calculate it.

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If vx = 7.00 units and vy = -7.60 units, determine the magnitude of v⃗ . determine the direction of v⃗ .

Alinearly polarized electromagnetic wave has an average intensity of 196 w/m^2. this wave is directed towards two ideal polarizers (in real polarizers, transmission is also effected by reflection and absorption). polarizer a is oriented with its transmission axis at an angle of θ_1=20.8∘ with the incident electric field. polarizer b has its axis at an angle of θ_2=63.0∘ with the incident electric field. what is the average intensity of the wave after it passes through polarizer a? what is the average intensity of the wave after it passes through polarizer b? suppose that the two polarizers a and b are interchanged. what would the average intensity be after passing through both polarizers?

Which sound characteristic is not affected by the relative motion of an object