"The process used by scientific investigations is the scientific method. This involves making an observation, stating a question, formulating a hypothesis, conducting an experiment and analyzing the results to form a conclusion. "
I would most likely go with B. but im not 100% sure
The ball is moving 60 mph from the observers POV because the ball already has a speed of 50mph and the man is able to throw it at a speed of 10mph and when you add 50mph and 10mph = 60mph.
<h3>As per the doppler's effect, when an object in the universe move at a fast speed away from the observer, its possesses a high wavelength as compared to its original wavelength.</h3><h3 /><h3>Since red light has the highest wavelength, any object's wavelength moving towards a high values is said to be red shifted.</h3><h3 /><h3>As per the doppler's effect, when an object in the universe move at a fast speed away from the observer, its possesses a high wavelength as compared to its original wavelength.Since red light has the highest wavelength, any object's wavelength moving towards a high values is said to be red shifted.Thus, the higher the wavelength, the lower will be the frequency of an object and hence it moves at a faster speed away from the observer and hence the universe is said to be expanding.</h3><h3 /><h3>As per the doppler's effect, when an object in the universe move at a fast speed away from the observer, its possesses a high wavelength as compared to its original wavelength.Since red light has the highest wavelength, any object's wavelength moving towards a high values is said to be red shifted.Thus, the higher the wavelength, the lower will be the frequency of an object and hence it moves at a faster speed away from the observer and hence the universe is said to be expanding.Thus, option C is correct.</h3><h3>hope help</h3>