A small stationary sphere carries a net charge Q. You perform the following experiment to measure Q: From a large distance you fire a smalltest particle of mass 4.00 ×10−4kg and a charge of q = 5.00 ×10−7C directly at the center of the sphere. The sphere’s mass is much greater than the mass of the test projectile, so you assume it remains at rest. The apparatus you are using measures the test particle’s speed vas a function of the distance xfrom the center of the large sphere. All the measured values of x are much larger than the radius of either object, so you treat bothas point particles. The straight line= 400 /–{(15.75/)/x}gives a good fit to the data points.(a)Explain why the graph is a straight line(b)What is the initial speed of the test particle when it is very far from the larger sphere(c)What is Q ?(d)How close does the test particle get to the sphere ?

1. consider the case in which air fills air shocks on a truck trailer. the pressure in the shocks is 2 mpa. the temperature is 300 k. the diameter of the shock piston is 10 cm and the initial length of the cylindrical cavity containing the compressed air is 40 cm. a. the truck is gradually loaded over a period of a day in a static setting. the temperature is held constant for the atmosphere and thus for the gas shock. calculate the compressibility of the air in the shock for this condition when the truck is initially being loaded. b. if the shocks were loaded in a dynamic setting by driving over bumps, what would be the compressibility? state your assumption. c. what is the initial load on the shock if the shock is in an atmospheric 100 kpa? d. if the shock is compressed using the process described in part a, and the air shock compressed air cavity length decreases to 20 cm, what is the additional load applied to the shock?

Astudent pushes on a 20.0 kg box with a force of 50 n at an angle of 30° below the horizontal. the box accelerates at a rate of 0.5 m/s2 across a horizontal floor. what is the value of the normal force on the box? 200 n 243 n 156 n 225 n

Which bonds are found inside a water molecule