Answer:
Explanation:
1.Technology is an application of science through use of modern scientific tools.
2.They provide a concrete view of something abstract. They are also applicable to gain an understanding of better process and systems.
3.C.55.25s
4. A. straight line graph.
5. A. Milk. A pure substance consist of a single element or compound.
6.B. it has two hydrogen atom to one oxygen atom
7.B. Sugar water.
8.D.Size of their particles.
9.A.sawing a piece of wood into half.
10.A..iron changes colour when heated.
11.A.solid
12.A. Lowering the temperature, which lead to increase in gas volume according to. Boyle's law.
13.C. boiling point of naphthalene.
14.freezing,which is the mostly orderly point of water because water moves from liquid to solid state.
15.A.sublimation.
16.B.Vaporisation.
17.C.it is described by a nucleus surrounded by a large volume is space.
18. The atom in the excited state has more energy and is less stable than atom in the ground state.
19.The discovery of elements with predicted properties.
20.The sum total of mass of an element.
Sound travels through waves, more specifically, through vibrations. They do not go from skull to ear, but they can go from ear to brain, or skull to brain. Ear to brain is simply vibrations traveling from outer ear, to inner ear, to the brain. Skull to brain, otherwise known as "bone conduction", has the vibrations hitting the skull, then to the temproal bone, then to the inner ear where the brain picks it up.
ANSWER
625 m/s
EXPLANATION
Given:
• The frequency of the sound wave, f = 250 Hz
,
• The wavelength, λ = 2.5 m
Find:
• The speed of the wave, v
The speed of a wave of wavelength λ and frequency f is given by,
Substitute the known values and solve,
Hence, the speed of the wave is 625 m/s.
The force is gravitational because when something is falling is call gravitational
