(1 point) suppose a spring with spring constant 4 n/m is horizontal and has one end attached to a wall and the other end attached to a 4 kg mass. suppose that the friction of the mass with the floor (i. e., the damping constant) is 8 n⋅s/m. set up a differential equation that describes this system. let x to denote the displacement, in meters, of the mass from its equilibrium position, and give your answer in terms of x, x′,x′′. assume that positive displacement means the mass is farther from the wall than when the system is at equilibrium. (equations) find the general solution to your differential equation from the previous part. use c1 and c2 to denote arbitrary constants. use t for independent variable to represent the time elapsed in seconds. enter c1 as c1 and c2 as c2. give your answer as x= (equations) is this system under damped, over damped, or critically damped? enter a value for the damping constant that would make the system critically damped. n⋅s/m (numbers)

at positions a, g kinetic energy is maximum.

at position d, potential energy is maximum.

electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. electromagnetic shielding that blocks radio frequency electromagnetic radiation is also known as rf shielding.

the shielding can reduce the coupling of radio waves, electromagnetic fields and electrostatic fields. a conductive enclosure used to block electrostatic fields is also known as a faraday cage. the amount of reduction depends very much upon the material used, its thickness, the size of the shielded volume and the frequency of the fields of interest and the size, shape and orientation of apertures in a shield to an incident electromagnetic

from wikipedia

the speed of the cart after 3 seconds of low fan speed is ⇒ 54.0 cm/s.

the speed of the cart after 5 seconds of medium fan speed is ⇒ 120.0 cm/s.

the speed of the cart after 2 seconds of high fan speed is ⇒ 64.0 cm/s. 

just did the lab.