Would anyone know the correct answer to this grade 8 science question? use the diagram and table below to answer the question. toy gun experiment ball mass (g) time (s) 1 55 2.1 2 45 1.6 3 63 2.3 4 35 1.2 a student has a toy gun that shoots balls with the same amount of force every time. the student loaded the gun with five balls that had different masses but that were the same size and shape. he shot the gun four times and measured how long it took each ball to travel 3 meters, and his results are shown in the table above. the fifth ball in the gun has a mass of 75 grams. based on the trend in the table, which of the following should the student predict will happen when he shoots the fifth ball? it will take the ball less than 2.3 seconds to travel 3 meters. it will take the ball more than 2.3 seconds to travel 3 meters. it will take the ball less than 1.2 seconds to travel 3 meters. it will take the ball exactly 1.2 seconds to travel 3 meters.

A30 kg weight lies on top of a massless piston of area a = 0.01 m2 the exterior air is at a (constant) p =1 atm and t = 27 c. the interior gas is 0.4 moles of (ideal) n2 and it has initial temperature 27.00 degrees c. 1. what is the initial pressure in the interior? a. 29.4 kpa b. 130.7 kpa c. 101.3 kpa the next three questions concern what happens when an amount of heat q is slowly added to the interior, raising the piston by 1 mm and raising the interior temperature to 27.40 c

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.

How does the electric potential energy between two charged particles change if one particle is reduced by a factor of 3? a. increased by a factor of 3 b. it is decreased by a factor of 9 c. it is reduced by a factor of 3 d. it is increased by a factor of 9