Why are power cords coated with a material that has different physical properties than the wire inside?

What is the weight of a 75kg sack of flour on Earth

If a 100n net force acts on a 50 kg car what will the acceleration of the car be

55. At the power substation near the edge of a large city, voltages are reduced and current is sent to the various neighbourhoods. Why don't the neighbourhoods get more current than what came from the high voltage lines? a.

Some areas of the Earth receive more solar radiation than others. Which of the following results from the Sun's uneven heating of the Earth?

A car accelerates from 6.00 m/s to 20.0 m/s, over a distance of 50.0 m. what is its rate of acceleration?

550 g of water at 105°C is poured into an 855 g aluminum container with an initial temperature of 11°C. The specific heat of aluminum is 900 J / (kg K).

what occurs when the soccer ball contacts the hands or arm of any player on the field except the goalkeeper?

Sand on a beach is covered by other layers of sand over time. The extra layers compress the first layer, packing it tighter and tighter. Over time, the bottom layers of sand have formed into sandstone, with colored bands showing the different layers.

How do i solve A sound wave has a frequency of 658 Hz in air and a wavelength of 0.46 m. What is the temperature of the air? Assume the velocity of sound at 0◦C is 331 m/s. Answer in units of ◦C

How has the space program affected Florida's culture