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pentagon [3]
3 years ago
9

Question 1

Physics
1 answer:
Dominik [7]3 years ago
3 0

Answer:

a. All the laboratory equipment given are very basic equipment used in all the laboratories. Name of each equipment is as follows:

  • V refers to the tape measure.
  • W refers to dropper.
  • X refers to an inoculating loop.
  • Y refers to a stopwatch.
  • Z refers to the microscope.

b. Use of each laboratory equipment identified is:

  • Tape measures (V) is used to measure the length of objects or distance in a laboratory.
  • Dropper (W) is used to measure unit of drop required to dispensed as one drop or several drops in any experiment.
  • Inoculating loop (X) is used by microbiologists to cultivate microbes on plates and retrieving an inoculum from a culture of microorganisms.
  • Stopwatch (Y) is used to measure the time of any  experiment.
  • Microscope (Z) is used to magnify an object to look at it in detail.

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EleoNora [17]

Apple hits the surface with speed 16.2 m/s

The angle made by the apple velocity with normal to the incline surface is given as 20 degree

now the component of velocity which is parallel to the surface and perpendicular to the surface is given as

v_{perpendicular} = v cos20

v_{parallel} = v sin20

so here we have

v_{parallel} = 16.2 sin20

v_{parallel} = 5.5 m/s

<em>so its velocity along the incline plane will be 5.5 m/s</em>

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Answer:

D

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Juliette [100K]

Answer:

The correct answer is false, a plant dying after being exposed to poison is not a physical change nor is it a physical property.

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3 years ago
A 0.49-kg cord is stretched between two supports, 7.8m apart. When one support is struck by a hammer, a transverse wave travels
katovenus [111]

To solve this problem we will apply the laws of Mersenne. Mersenne's laws are laws describing the frequency of oscillation of a stretched string or monochord, useful in musical tuning and musical instrument construction. This law tells us that the velocity in a string is directly proportional to the root of the applied tension, and inversely proportional to the root of the linear density, that is,

v = \sqrt{\frac{T}{\mu}}

Here,

v = Velocity

\mu= Linear density (Mass per  unit length)

T = Tension

Rearranging to find the Period we have that

T = v^2 \mu

T = v^2 (\frac{m}{L})

As we know that speed is equivalent to displacement in a unit of time, we will have to

T = (\frac{L}{t}) ^2(\frac{m}{L})

T = (\frac{7.8}{0.83})^2 (\frac{0.49}{7.8})

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Therefore the tension is 5.54N

8 0
2 years ago
The temperature of a substance depends on what two types of energy​
Bezzdna [24]

Answer:

Thermal and kinetic.

Explanation:

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