More acceleration practice , PLEASE HELP ME 1.A race car starts and finishes a race that is 50,000m. (30miles). The time is 23 minutes. The final velocity is 67m/s. What is the average acceleration?

2.The same car, after crossing the finish line, has a velocity of 45m/s. after 25 seconds. What was the acceleration for this time period?

3.The same car, after the time period in question 2, within 0.5 minute, slows to a constant speed of 20m/s. What was its acceleration for this time period? What is its acceleration after this 0.5 minute time period?

4.The same car, then follows a curve in the road at the same speed. Describe its acceleration. This same car then accelerates at 2m/s2. What will be its velocity after 10 seconds?

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 answer is ampere

the ampere is used to measure electricity. an ampere is a unit of electric current equal. a unit of measure for the flow of current in a circuit. one ampere is the amount of current flow provided when one volt of electrical pressure is applied against one ohm of resistance.

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