Trevor is pulling his younger brother in a wagon. he pulls the wagon 50 m to the corner with a force that is parallel with the ground. he then turns the wagon around and pulls it 50 m back to the starting point with the same force at an angle of 30° with respect to the ground. how does the amount of work trevor performs going to the corner compare with the amount of work he performs coming back? athey are the same because he uses the same amount of force. b they are the same because he travels the same distance. c. he does less work coming back because the force moving the wagon is only 50cos30°. d. he does more work coming back because the force moving the wagon is only 50cos60°.

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.

When electrons are added to the outermost shell of a carbon atom, it forms--an anion that has a larger anion that has a smaller cation that has a larger cation that has a smaller radius.

Convection occurs when thermal energy is transferred by the movement of