Mechanics | Relativity Answers

The standard temperature and pressure for measuring the volume of liquids and solids is.
Option A. 20 °C and 700 mmHg.
Option B. 20 °C and 760 mmHg.
Option C. 0 °C and 760 mmHg.

Show that the magnitude of the resultant of two vectors A and B cannot be greater than the sum of the magnitudes of A and B, and lesser than the difference of the magnitudes of A and B.

if the average speed of an orbiting space shuttle is 19,800mi/h, determine the time required for it to circle earth

Is there a math formula that relates Doppler effect and speed of the moving source? And is it different when applied to sound or when applied to light?

REMARKS Note that the negative solution has been disregarded, because it's not physically meaningful. In checking (step 8), note that the units are correct and that an approximate answer can be obtained by using the easier quantities, 500 km and 400 km. Doing so gives an answer of 300 km, which is approximately the same as our calculated answer of 270 km.

QUESTION What is the answer if the distance traveled due east and the direct return distance are both doubled?

km
PRACTICE IT
Use the worked example above to help you solve this problem. An airplane travels 4.07 102 km due east and then travels an unknown distance due north. Finally, it returns to its starting point by traveling a distance of 505 km. How far did the airplane travel in the northerly direction?

km

While using a jack a mechanic applied a force of 100N on the effort piston while raising the rear part of a car.Determine the maximum load that can be raised

Is it correct to say that on a moving train, although you hear the blowing horn pitch change while passing you at the station, the speed of propagation of the sound waves are the same before and after passes you?

A body moves from A to B at 40 km/hr and returns from B to A at 60 km/hr. Calculate the average speed and average velocity of the body during the total trip.

Occasionally, people can survive falling large distances if the surface they land on is soft enough. During a traverse of Eiger's infamous Nordvand, mountaineer Carlos Ragone's rock anchor gave way and he plummeted 488 feet to land in snow. Amazingly, he suffered only a few bruises and a wrenched shoulder. Assuming that his impact left a hole in the snow 4.5 ft deep, estimate his average acceleration as he slowed to a stop (that is while he was impacting the snow). (Note, for this question the positive direction is defined as down.)