What is the electric field at a point 0.450 m to the left of a -5.77*10^-9 C charge? Include a + or - sign to indicate the direction the field.

Which diagram correctly demonstrates the various forces acting on a ball moving horizontally with some speed?

Ineed the answer to question 1 , i’m desperate

An important dimensionless parameter concerned with very high-speed flow is the mach number, defined as v/c, where v is the speed of the object such as an airplane or projectile, and c is the speed of sound in the fluid surrounding the object. for a projectile traveling at 1170 mph through air at 50 ˚f and standard atmospheric pressure, what is the value of the mach number?