A baseball player hits a ball that arcs at an angle of 42˚ above the horizontal. If the ball is hit at a velocity of 8 m/s, what is the horizontal component of the velocity? Explain how this can be calculated.

This is what a calorimeter is used for simpler ex, to measure calories in food.

I'm pretty sure the answer is c 

We can infer that star y is closer but other factors must be considered include the heat of the star, the mass, and the brightness of the star. even though star x seems dimmer it may just be less bright or contains less heat.