The space capsule has a mass of 1200 kg and a moment of inertia ig = 900 kg·m2 about an axispassing through g and directed perpendicular to the page. if it is traveling forward with a speed vg = 800 m/s and executes a turn by means of two jets which provide a constant thrust of 400 n for 0.3 s, determine the capsule's angular velocity just after the jets are turned off.

can you explain what has done here?

Explanation:

Angular impulse = change in angular momentum

Mg Δt = ΔHg

Mg Δt = Hg₂ − Hg₁

Rearranging, initial angular momentum + angular impulse = final angular momentum

Hg₁ + Mg Δt = Hg₂

Initially, the rocket is not turning, so ω₁ = 0 rad/s.

Hg₁ = I ω₁

Hg₁ = (900 kg m²) (0 rad/s)

Hg₁ = 0 kg m²/s

The total moment applied is the sum of the perpendicular components of each force multiplied by the distance.  Take counterclockwise to be positive.

Mg = (400 N cos 15° × 1.5 m) + (400 N cos 15° × 1.5 m)

Mg = 2 (400 N cos 15° × 1.5 m)

The time of the impulse Δt is 0.3 s.

The final angular momentum is the product of the moment of inertia and the final angular velocity.

Hg₂ = I ω₂

Hg₂ = (900 kg m²) ω₂

Plugging everything in:

0 kg m²/s + 2 (400 N cos 15° × 1.5 m) (0.3 s) = (900 kg m²) ω₂

ω₂ = 0.386 rad/s

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