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Answer:
1.When two forces act in the same direction, they add together. ... Equal forces acting in opposite directions are called balanced forces. Balanced forces acting on an object will not change the object's motion. When you add equal forces in opposite direction, the net force is zero.
2.The Earth, for example, has more gravity than people. This is why an object that falls is drawn to the Earth and returns to the Earth instead of being drawn to a person and flying at that person. Some examples of the force of gravity include: The force that holds the gases in the sun.
3.Answer: (a) When dilute sulphuric acid is poured on a copper plate, no reaction takes place due to less reactivity of copper. ... Copper gets deposited on the iron nail and green solution is ferrous sulphate solution.
4.Physical Properties of Metals
Metals are lustrous, malleable, ductile, good conductors of heat and electricity. Other properties include: State: Metals are solids at room temperature with the exception of mercury, which is liquid at room temperature (Gallium is liquid on hot days).
5.Sonorous means, metals make a ringing sound when we strike them.Oct 4,
6.Pressure means how much force something is pushing on something else with.. It is expressed as force acting per unit area: P = F / A. (Pressure = Force divided by Area that force is acting on) It can also be defined as thrust (compressive force acting perpendicularly to the surface of a body) acting per unit area.
Explanation:
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Answer:
a. when tow forces act in the same direction the add together.
b. when ball is thrown upwards always come downwards after a certain height because the ball is pulled by the earth gravitational force.
c. when dilute sulpheric acid is poured on a copper plate no reaction takes place due to less reactivity of copper
d. 1. lustrous
2. ductile
3. malleable
4. high density
e. metals are generally sonorous I.e they produce sound on being struck by some things
f. the perpendicular forces per unit area on the stress at a point within a confined fluid