One of the hazards facing humans in space is space radiation: high-energy charged particles emitted by the sun. during a solar flare, the intensity of this radiation can reach lethal levels. one proposed method of protection for astronauts on the surface of the moon or mars is an array of large, electrically charged spheres placed high above areas where people live and work. the spheres would produce a strong electric field e⃗ to deflect the charged particles that make up space radiation. the spheres would be similar in construction to a mylar balloon, with a thin, electrically conducting layer on the outside surface on which a net positive or negative charge would be placed. a typical sphere might be 5 m in diameter. suppose that to repel electrons in the radiation from a solar flare, each sphere must produce an electric field e⃗ of magnitude 1 × 106 n/c at 25 m from the center of the sphere. what is the magnitude of e just outside the surface of such a sphere

1134567 a jet with mass m = 1.1 ă— 105 kg jet accelerates down the runway for takeoff at 2 m/s2. 1) what is the net horizontal force on the airplane as it accelerates for takeoff? 2.2*10^5 n your submissions: 2.2*10^5 computed value: 220000submitted: saturday, january 26 at 2: 41 pm feedback: correct! 2) what is the net vertical force on the airplane as it accelerates for takeoff? 0 n your submissions: 0 computed value: 0submitted: saturday, january 26 at 2: 41 pm feedback: correct! 3) once off the ground, the plane climbs upward for 20 seconds. during this time, the vertical speed increases from zero to 21 m/s, while the horizontal speed increases from 80 m/s to 95 m/s. what is the net horizontal force on the airplane as it climbs upward? n 4) what is the net vertical force on the airplane as it climbs upward? n 5) after reaching cruising altitude, the plane levels off, keeping the horizontal speed constant, but smoothly reducing the vertical speed to zero, in 13 seconds. what is the net horizontal force on the airplane as it levels off? n 6) what is the net vertical force on the airplane as it levels off?

The graph represents the distance a car travels over time while on the highway. which statement about the car's trip is accurate? a) the car does not move over time. b) the car travels at a constant velocity. c) the car's velocity increases constantly over time. d) the car's velocity decreases constantly over time.

Air is to be preheated by hot exhaust gases in a cross-flow heat exchanger before it enters the furnace. air enters the heat exchanger at 95 kpa and 20°c at a rate of 0.6 m^3/s. the combustion gases (cp = 1.10 kj/kg°c) enter at 160°c at a rate of 0.95 kg/s and leave at 95°c. determine the rate of heat transfer to the air and its outlet temperature.