Asmall dog is trained to jump straight up a distance of 1.2 m. how much kinetic energy does the 7.2-kg dog need to jump this high? (the acceleration due to gravity is 9.8 m/s2.) show your work for credit.

Which expression allows you to determine the mechanical advantage of an inclined plane? a. height of plane / input force b. length of plane / input force c. length of plane / height of plane d. height of plane / length of plane

In positive numbers less than 1, the zeros between the decimal point and a non-zero number are blank significant

Along wire carrying a 4.2 a current perpendicular to the xy-plane intersects the x-axis at x=−1.7cm. a second, parallel wire carrying a 3.0 a current intersects the x-axis at x=+1.7cm. part a at what point on the x-axis is the magnetic field zero if the two currents are in the same direction? express your answer to two significant figures and include the appropriate units.