Answer:
The final speed of puck 1 is 0.739 m/s towards west and puck 2 is 2.02 m/s towards east .
Explanation:
Let us consider east as positive direction and west as negative direction .
Given
mass of puck 1 ,
mass of puck 2 ,
initial speed of puck 1 ,
initial speed of puck 2 ,
Final speed of puck 1 and puck 2 be respectively
Apply conservation of linear momentum
=>
=> -----(A)
Since collision is perfectly elastic , coefficient restitution e=1
=> ------(B)
From equation (A) and (B)
and
Thus the final speed of puck 1 is 0.739 m/s towards west and puck 2 is 2.02 m/s towards east .
Answer
The intensity of a sound wave depends on the pressure of the wave,density of the medium and speed of sound in the medium. Higher density and higher sound speed both give a lower intensity. and may be it is because that sound wave is more characterize by wavelength than frequency..explanation
Explanation:
As decibel levels get higher, sound waves have greater intensity and sounds are louder. For every 10-decibel increase in the intensity of sound, loudness is 10 times greater. Intensity of sound results from two factors: the amplitude of the sound waves and how far they have traveled from the source of the sound.
Immediately after the switch is closed, the capacitor acts like a short circuit for a very small time. We can calculate the currents through each resistor by first calculating the total resistance:
Req = 1/(1/3+1/6) + 8 = 1/(3/6) + 8 = 2 + 8 = 10 ohms.
IR1 = E / Req = 42 / 10 = 4.2 A.
VR2 = VR3 = E * R23 / Req = 42 * 2 / 10 = 8.4 V
IR2 = VR2 / R2 = 8.4 / 6 = 1.4 A.
IR3 = VR3 / R3 = 8.4 / 3 = 2.8 A.
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Answer:
C Thy make the force exert all at once
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.