III. Traffic Accident #3:
You have arrived at the final accident scene of the day. Two cars of equal mass (2,000 kg each)
were involved in a head-on accident at a four-way-stop intersection. Here is what you know:
•
Car 1 started at rest and coasted toward the intersection from the top of a 50-meter hill.
.
•
Car 2 was on a flat stretch of road at the bottom of the hill in front of Car 1.
At the bottom of the hill, before braking, Car 1 was going 30 m/s and Car 2 was going 20
m/s.
From the skid marks on the road you can see that Car 1 applied force on its brakes for 5
seconds, 75 meters before the stop sign where it came to a stop.
There were no skid marks left by Car 2. The collision occurred at the stop sign, where Car
1 had stopped. After the collision, Car 2 came to a stop. Car 1's final velocity is unknown.

Use the frequency histogram to complete the following parts. ​(a) identify the class with the​ greatest, and the class with the​ least, relative frequency. ​(b) estimate the greatest and least relative frequencies. ​(c) describe any patterns with the data. female fibula lengths 30.5 31.5 32.5 33.5 34.5 35.5 36.5 37.5 38.5 39.5 0 0.05 0.1 0.15 0.2 0.25 length (in centimeters) relative frequency a histogram titled "female fibula lengths" has a horizontal axis labeled "length in centimeters" from 30.5 to 39.5 in increments of 1 and a vertical axis labeled "relative frequency" from 0 to 0.25 in increments of 0.05. the histogram contains vertical bars of width 1, where one vertical bar is centered over each of the horizontal axis tick marks. the approximate heights of the vertical bars are listed as follows, where the label is listed first and the approximate height is listed second: 30.5, 0.02; 31.5, 0.04; 32.5, 0.05; 33.5, 0.13; 34.5, 0.22; 35.5, 0.25; 36.5, 0.13; 37.5, 0.06; 38.5, 0.09; 39.5, 0.01. ​(a) the class with the greatest relative frequency is nothing to nothing centimeters. ​(type integers or decimals. do not round. use ascending​ order.)

Amoving electron has kinetic energy k1. after a net amount of work w has been done on it, the electron is moving one-quarter as fast in the opposite direction. (a) find w in terms of k1. (b) does your answer depend on the final direction of the electron's motion?

What is the measure of how much matter is in an object and that can be measured using a balance? a. height b. volume c. weight d. mass