URGENT! 40 POINTS! For each situation below, make a model of the situation and find the work done on the box using both energy and forces. 1. A 2 kg box with some initial velocity slides up a frictionless ramp, which is at a 15ᵒ

angle to the ground, until the box comes to rest 1 second later.

2. A 2 kg box initially at rest slides down a frictionless ramp (at 15ᵒ from the ground) for

1 second.

3. A 2 kg box is thrown upward with an initial speed of 3.5 m/s. Consider the box from

the time it was thrown until it reaches its maximum height.

4. A 2 kg box is dropped from an initial height of 10 m.

I have some physics, I just don't know what formulas to use or where to start. Help is much appreciated.

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

myth. it was once thought that animals, including cats and dogs, could only see in black and white. however, scientists have proven this to be a myth. in all animals, including humans, the perception of colour is determined by the presence of cells in the eye called cone photoreceptors.