"at a cross-country track meet, alicia ran 8 mph for the first part of the race, then increased her speed to 12 mph for the second part. if the race was 21 miles long and alicia finished in 2 hours, how far did she run at the faster pace? "

A3.9 g aluminum foil ball with a charge of +4.1×10−9 c is suspended on a string in a uniform horizontal e⃗ field. the string deviates to the right and makes an angle of 30∘ with the vertical. part a part complete what information about the e⃗ field can you determine for this situation? what information about the field can you determine for this situation? only the magnitude of e⃗ only the direction of e⃗ both the magnitude and the direction of e⃗ none of the above previous answers correct part b determine the magnitude of the electric field. express your answer with the appropriate units. e e = nothing nothing request answer part c determine the direction of the electric field. determine the direction of the electric field. to the right to the left away from you toward you

Which changes would result in a decrease in the gravitational force btween two objects? check all that apply

The ability to make things happen is also called a. heat b. force c. matter d. energy