The hotter star will be 16 times more luminous - luminosity depends on two things - the size of the star and the temperature of the star. The hotter a star is, the more energy it will give out. This will give rise to greater luminosity.
The aero plane would only move forward when the thrust force exceeds the drag force.
<h3>What is a projectile?</h3>
The term projectile has to do with a motion that follows a curved trajectory through air. The motion of an airplane that is dropping relief packages to flood victims is a good example of a projectile.
Excluding the horizontal and vertical forces, there are four important forces that act on the airplane;
- Drag force
- Gravity
- Lift
- Drag
- Thrust
The aero plane would only move forward when the thrust force exceeds the drag force.
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Answer:
Explanation:
Given
mass of hot metal
specific heat
mass of water
Temperature pf water
Final Temperature
let be the temperature of hot metal ball
Heat lost by heat metal bolt is gained by water in calorimeter
Heat lost by hot metal bolt
Heat gained by water
Answer:
Physical changes only change the appearance of a substance, not its chemical composition. Chemical changes cause a substance to change into an entirely substance with a new chemical formula. Chemical changes are also known as chemical reactions.
Answer:
W = 85.73 m
Explanation:
given,
surveyor walks = 118 m
makes an angle of = 36.0° with the tree
to find the width of the river
W = 85.73 m
hence, the width of the river is equal to W = 85.73 m