which of the following is true? a) speed is velocity w a vector b) speed is a scalar w direction c) speed is velocity w direction d) velocity is speed w a direction

James dissolves 20 g of table salt in 100 mL of water at 20°C. What prediction can you make about what will happen if all 100 mL of water are boiled away?

How many atoms make up this compound? NaOH A. 1 B. 2 C. 3 D. 4

During the sudden impact of a car accident, a person's neck can experience abnormal forces, resulting in an injury commonly known as whiplash If a victim's head and neck move in the manner shown in the figure, his car was hit from the O top during a

If Sam performs fewer push-ups in a set after a three week break, he understands the A. muscular endurance principle B. exercise specificity principle C. law of reversibility

What is the reason that a fixed pulley makes work easier

A 6.0 kg box slides down an inclined plane that makes an angle of 39° with the horizontal. If the coefficient of kinetic friction is 0.19, what is the magnitude of the acceleration, in m/s2, of the box down the slope?

Identify the following as a suspension or a colloid. sand in water

A cyclist starts at a position of 0 m and takes 3 s to move east to a position of + 8 m. He then cycles west to a position of + 5 m which takes an additional 2 s. What is the cyclist's displacement? a. + 11mb. - 8mc. - 5m d. + 5m

What happens when you shoot a bullet into the sky?

If you want to lift a 5-kg box to a height of 2 meters, how much work must be done? O A. 2J O B. 50 J O C. 98 J O D. 100