After taking the metro to dupont circle in washington, dc, jess reached street level by walking up the escalator at a brisk rate, taking 70 steps during the trip to the top. suddenly curious about the length of the escalator, jess returned to the bottom and walked up the same escalator at a leisurely rate, taking steps two fifths often as on the first trip, taking 40 steps in all. how many steps can be seen on the visible part of the escalator?

There are two routes similar in terrain; however, one route has an incline of approximately 28 degrees, and you must decide on which route to take. what is the maximum road grade that your fully loaded ecv can climb?

An object resting on a table weighs 100 n. with what force is the object pushing on the table? with what force is the table pushing on the object? explain how you got your answer.

Acentrifuge in a medical laboratory rotates at an angular speed of 3,700 rev/min. when switched off, it rotates through 54.0 revolutions before coming to rest. find the constant angular acceleration (in rad/s2) of the centrifuge. your response is within 10% of the correct value. this may be due to roundoff error, or you could have a mistake in your calculation. carry out all intermediate results to at least four-digit accuracy to minimize roundoff error. rad/s2