A body weighing 8 N is supported by two cables whose voltages T1 and T2 form angles of 60 ° and 30 ° with the ceiling. How much are these tensions worth? Choose the correct option. Select one: a. 4N and 7N b. 5N and 7N c. 4N and 10N

a. 4N and 7N

Explanation:

Draw a free body diagram.

Sum of the forces in the x direction:

∑F = ma

T₂ cos 30° − T₁ cos 60° = 0

T₂ cos 30° = T₁ cos 60°

T₂ (½√3) = T₁ (½)

T₁ = T₂ √3

Sum of the forces in the y direction:

∑F = ma

T₂ sin 30° + T₁ sin 60° − mg = 0

T₂ sin 30° + (T₂ √3) sin 60° − mg = 0

½ T₂ + 1.5 T₂ − mg = 0

2 T₂ = mg

T₂ = 4 N

T₁ = 4√3 N

T₁ ≈ 7 N

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

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explanation:

physics means: "the branch of science concerned with the nature and properties of matter and energy. the subject matter of physics, distinguished from that of chemistry and biology, includes mechanics, heat, light and other radiation, sound, electricity, magnetism, and the structure of atoms."