When you return to earth after a space mission, you will have aged
a. the same as someone who remained on earth during your mission
b. the same as you would if you remained in space
c. slightly more than the person who remained on earth
d. slightly less than a person who remains on earth

The correct answer is option (d) i.e. When you return to Earth after a space mission, you will be aged slightly less than the person who remained on Earth.

 The exact age difference depends on the details of the journey. This can be explained by the time dilation concept of Relativity.

luster is not a good characteristic to use by itself because luster is the property of minerals that indicates how much the surface of a mineral reflects light. the luster of a mineral is affected by the brilliance of the light used to observe the mineral surface.

weight of the box is given as

here this is placed on the inclined of angle 42 degree

now this weight will have two components one is along the incline other is perpendicular to it

so here we need to apply a force parallel to incline opposite to its component of weight

so here the component of weight is given as

here we have

so it requires 75 n force to move it upwards