Answers: 2

Physics, 21.06.2019 18:10, zuleromanos

An insurance company wants to know if the average speed at which men drive cars is higher than that of women drivers. the company took a random sample of 27 cars driven by men on a highway and found the mean speed to be 72 miles per hour with a standard deviation of 2.2 miles per hour. another sample of 18 cars driven by women on the same highway gave a mean speed of 68 miles per hour with a standard deviation of 2.5 miles per hour. assume that the speeds at which all men and all women drive cars on this highway are both approximately normally distributed with unknown and unequal population standard deviations.

Answers: 2

Physics, 21.06.2019 18:30, mariatorres7

Which of these describe conduction transfer of heat between two objects that are touching transfer of heat by the actual movement of war matter the process in which energy is imitated by one of the object transmitted through space and absorbed by another a process in which energy is released by the molecules breaking apart

Answers: 1

Physics, 22.06.2019 03:50, dsaefong00

Nitrogen at 100 kpa and 25∘c in a rigid vessel is heated until its pressure is 260 kpa. calculate the work done and the heat transferred during this process, in kj/kg. for the nitrogen, cv= 0.743 kj/kg⋅k at room temperature. (round the final answers to one decimal place.)the work done during this process is (kj/kg)? the heat transferred during this process is (kj/kg)?

Answers: 2

Physics, 22.06.2019 07:20, Nadi4753

Samir watches a 100-minute movie on his spaceship. maria's spaceshipe flies in the same direction as samir's spaceship but she observes his move to last 125 minutes and his spaceship to be 40 m long. how long does samir observe his own spaceship to be? according to an observer on earth, planet x is stationary. maria and samir depart earth on their spaceships at the same time, each flying at 0.5c. maria flies toward planet x and samir flies in the opposite direction. according to maria, her voyage to planet x takes 9 years. how many years does marias voyage take according to samir?

Answers: 3

What is the units of n i really need

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