Answer:
Option D
Explanation:
These advancements are very expensive and not available to everyone. The others are positive aspects of these advancements in transportation.
<span>Because of
the density of the paperclip it sinks, but even though a boat is normally made
of steal it contains an opposite force of gravity known as buoyancy. Buoyancy
is the reason that a boat will float. Boat density is less weight than the water
they are in so this is one reason that they are floaters.</span>
Answer:
Explanation:
1. All screws give the same M.A.
False - it depends on screw size and threads
2. A screw does its job by moving.
True - as far as screw as a machine
3. A screw with more threads has a smaller M.A.
False - more threads increase output force i.e. higher MA
4. Screws can be used to move things. *
True
Net force is an unbalanced force, so the object will change speed or direction.
Either the object may speed up or slow down.
Answer:
a) a planet orbiting the Sun,
Explanation:
- As the word centripetal force means the movement of the body towards the centers around to which it's moving. The force of gravity of the sun, moon, and sun all celestial objects enable them to attract other celestial bodies.
- The bigger is the mass the bigger will force of attraction. Like the other planets in the solar system, the earth is also attracted to the sun and revolves around in its defined orbit in an elliptical path.
