Suppose the first stage of a two-stage rocket has a total massof 12,000 kg, of which 9,000 kg is fuel.
the total mass of the second stage is 1,000 kg, of which 700kg is fuel.
assume that the relative speed vexof ejected material is constant, and ignore the effect ofgravity.
a) suppose the entire fuel supply carried by the two-stagerocket is utilized in a single-stage rocket with the same totalmass of 13,000 kg. in terms of vex , what isthe speed of the rocket, starting from rest, when its fuel isexhausted?
b) for the two-stage rocket, what is the speed when the fuelof the first stage is exhausted if the first stage carries thesecond stage with it to this point?
this speed (from part b) then becomes the initial speed of thesecond stage. at this point, the second stage separates from thefirst stage.
c) what is the final speed of the second stage?
d) what value of vex is required to givethe second stage of the rocket a speed of 7.00 km/s?

b.transmitters send radio waves, and receivers capture radio waves.

the answer is a. the yacht traveled from the dock north to the 200-meter marker in the bay in less than 5 minutes, giving the passengers several more hours to fish.

im doing peak rn so sry if its wrong

heat the gas and measure the pressure

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