Consider a charged particle at a points whose coordinates are (8 m, 4 m, 10 m). we would like to find the electric field vector at a point p whose coordinates are (7 m, 2 m, 6 m). the "unit vector" r ^ is a vector that points from s to p that has length of 1 (or "unity"). what is its y component, in meters

An engineer designs a roller coaster so that a car travels horizontally for 162 ft, then climbs 127 ft at an angle of 31.0° above the horizontal. it then moves 127 ft at an angle of 46.0° below the horizontal. if we take the initial horizontal motion of the car to be along the +x-axis, what is the car's displacement? (give the magnitude of your answer, in ft, to at least four significant figures and give the direction of your answer in degrees counterclockwise from the +x-axis.)

Avalue that describes how heavy an object is and is related to the force of gravity is

Aresistor with an unknown resistance is connected in parallel to a 9 ω resistor. when both resistors are connected in parallel to an emf source of 21 v, the current through the unknown resistor is measured with an ammeter to be 4 a. what is the resistance of the unknown resistor? answer in units of ω.