A car runs at a constant speed of 15m/s for 300sec and then accelerate uniformly to a speed of 25m/s over a period of 20sec. this speed is maintained for 300sec before the car is brought to rest with uniform deceleration in 30sec. Draw a velocity time graph to rep the journey described above. from the graph, find the
1. the acceleration when the velocity increases from 15m/s to 25m/s
2. the total distance traveled in the time described
3.the average speed over the time described

asthenosphere and convection

a displacement distance is size of displ

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

a skateboard rolling across the street - apex