Practice problems
1. a concave mirror has a focal length of 6.0 cm. an object with
a height of 0.60 cm is placed 10.0 cm in front of the mirror.
a. calculate the image distance. 15 cm
b. calculate the image height. -0,9 cm
2. in the diagram below, the object is between the mirror and f.
use the data in the diagram to answer the questions below.
a. calculate the image distance.
b. calculate the image height.
ci
4 cm
2 cm

Explain the difference between each pair of concepts. a. frequency and relative frequency b. percentage and relative frequency a. select the correct choice below. a. frequency is the total number of observations in a data set. relative frequency is the number of times a particular distinct value occurs. b. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of a value to the total number of observations. c. frequency is the total number of observations in a data set. relative frequency is the ratio of the number of times a particular distinct value occurs to the frequency. d. frequency is the number of times a particular distinct value occurs. relative frequency is the ratio of the frequency of two different values.

What would be the strength of earth's gravitational field at a point where an 80.0 kg astronaut would experience a 80% reduction in weight

In a classical model of the hydrogen atom, the electron moves around the proton in a circular orbit of radius 0.053 nm. what is the electron's orbital frequency? what is the effective current of the electron?