A student constructs a cold pack which becomes cold to the touch when activated. The cold pack is activated when an inner water pouch is squeezed until it bursts, allowing the water to mix with a solid substance. She constructs the device as shown below. The solid she uses in the cold pack is ammonium chloride. She wants to modify her device to make it colder when it is activated. She conducts some tests and collects the data shown below. Based on the test results, which solid should she use that would best modify her cold pack?

total distance travelled = 60 miles

total time taken =1.5 hours

average speed = total distance / total time

60 / 1.5

= 40

therefore, average speed = 40 m/h

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pls mark as brainliest

in simple terms, the principle states that the buoyancy force on an object is equal to the weight of the fluid displaced by the object, or the density of the fluid multiplied by the submerged volume times the gravitational acceleration, g. this is also known as upthrust.

the word that best describes martin luther king jr.'s tone in the video is dignified

martin luther king, jr. was a social activist and baptist minister who played a key role in the american civil rights movement from the mid-1950s until his assassination in 1968. the video shows his manner and attitude having or showing a composed or serious manner that is worthy of respect so dignified is the correct answer