Write i for current, v for voltage, and r for resistance. 1. measured in amperes 2. measured in ohms 3. a flow of charge 4. depends on length and width of a wire 5. the rate at which charge passes a given point 6. measured in volts 7. opposition to the flow of electric charge.

Lets say that an object of a certain volume has a certin mass. what happens to its mass when you double its volume?

According to newton’s first law of motion, which force is expected to cause a body to accelerate?

Astudent throws a water balloon with speed v0 from a height h = 1.76 m at an angle θ = 21° above the horizontal toward a target on the ground. the target is located a horizontal distance d = 9.5 m from the student’s feet. assume that the balloon moves without air resistance. use a cartesian coordinate system with the origin at the balloon's initial position. (a) what is the position vector, rtarge t, that originates from the balloon's original position and terminates at the target? put this in terms of h and d, and represent it as a vector using i and j. (b) in terms of the variables in the problem, determine the time, t, after the launch it takes the balloon to reach the target. your answer should not include h. (c) create an expression for the balloon's vertical position as a function of time, y(t), in terms of t, vo, g, and θ. (d) determine the magnitude of the balloon's initial velocity, v0, in meters per second, by eliminating t from the previous two expressions.