How much energy is required to turn 4.5kg of water into steam wi
temperature? (Please give the answer in MJ to 2dp).
Material
Specific latent heat of
fusion (J/kg)
Specific latent heat of
vaporisation (J/kg)
2 260 000
871000
Water
334 000
Lead
24 500
855 000
108 000
Ethanol
Note: the water has already been heated to its boiling point
Jor
MJ (to 2dp)

A3.9 g aluminum foil ball with a charge of +4.1×10−9 c is suspended on a string in a uniform horizontal e⃗ field. the string deviates to the right and makes an angle of 30∘ with the vertical. part a part complete what information about the e⃗ field can you determine for this situation? what information about the field can you determine for this situation? only the magnitude of e⃗ only the direction of e⃗ both the magnitude and the direction of e⃗ none of the above previous answers correct part b determine the magnitude of the electric field. express your answer with the appropriate units. e e = nothing nothing request answer part c determine the direction of the electric field. determine the direction of the electric field. to the right to the left away from you toward you

Aspring is used to stop a 50-kg package which is moving down a 20º incline. the spring has a constant k = 30 kn/m and is held by cables so that it is initially compressed 50 mm. knowing that the velocity of the package is 2 m/s when it is 8 m from the spring and neglecting friction, determine the maximum additional deformation of the spring in bringing the package to rest.

Which of these is the best way to manage a natural resource