A 7.0\, \text {kg}7.0kg7, point, 0, start text, k, g, end text box is at rest on a table. The static friction coefficient \mu_sμ s ​ mu, start subscript, s, end subscript between the box and table is 0.400.400, point, 40, and the kinetic friction coefficient \mu_kμ k ​ mu, start subscript, k, end subscript is 0.100.100, point, 10. Then, a 30\,\text N30N30, start text, N, end text horizontal force is applied to the box. What is the best estimate of the magnitude of the box’s acceleration?

Use the empirical rule. the mean speed of a sample of vehicles along a stretch of highway is 70 miles per hour, with a standard deviation of 4 miles per hour. estimate the percent of vehicles whose speeds are between 66 miles per hour and 74 miles per hour. (assume the data set has a bell-shaped distribution.)

Science and technology are interdependent. advances in one lead to advances in the other. give an example of this phenomenon.

Unpolarized light falls on two polarizer sheets whose transmission axes are at right angles. a third polarizer is placed between the first two so that its axis makes a 52-degree angle with the axis of the first polarizer. a) what fraction of the incident light intensity is transmitted through the first polaroid? b) what fraction of the incident light intensity is transmitted through the second polaroid? c) what is the angle of polarization of the light that enters the third polaroid? d) what fraction of the incident light intensity is transmitted through the third polaroid. e) what happens if the middle polaroid is removed?