cos [theta] = 1/beta. what are the dimensions of beta? radians length / time uni

Question

cos [theta] = 1/beta. what are the dimensions of beta? radians length / time unitless length degrees energy m = m0/ is an equation found in special Relativity, where m and m0 are units of mass and v is a measure of speed. What are the units of c? Some myster quantity has the equation where P is a measure of power, F is a measure of force, x is a measure of length, and t is measure of time. In terms of the standard SI basis units , what are the units of ? The argument of any trigonometric function must be unitless. There is an equation with the term , where r is a measure of length, T is a measure of time, and m is a measure of mass. The student working with this does not know the meaning of , but from the equation he knows its dimensions. What are the dimensions of ?

Explanation / Answer

1) C

2) C

3) B

4) A

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