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bogdanovich [222]
3 years ago
13

This is a form of energy representing the motion of the molecules which make up an object. A. Thermal Energy B. Kinetic Energy C

. Gravitational Potential Energy D. Chemical Potential Energy
Physics
1 answer:
bija089 [108]3 years ago
4 0

Answer:

Kinetic energy.

Explanation:

  • There are many kinds of energy. Some of them are kinetic energy, potential energy, thermal energy etc.
  • The energy that shows the motion of the object is called its kinetic energy.
  • Also, the sum of kinetic energy and the gravitational potential energy is called mechanical energy.
  • Out of the given options, kinetic energy is the form of energy that represents the motion of the molecules which make up an object.
  • Hence, the correct option is (B).
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The half-life for a 100-gram sample of radioactive element X is 5 days. How much of element X remains after 10 days have passed?
pav-90 [236]

Answer:

25g

Explanation:

Given parameters:

    Half life of X = 5days

Mass of sample of radioactive elements  = 100g

The half-life of a radioactive material is the time it takes for a sample to decay by half. At the half-life, an original sample would have yielded equal daughter to parent ratio.

 At time (days)            Mass of sample

      0                                 100g

     5                                    50g

    10                                    25g

Every 5 days, the sample will split into half.

Therefore, 25g will remain after 10days.

3 0
3 years ago
You push on the top edge of a 1.8 m tall solid circular cylinder of iron which is 4.00 cm in diameter. You push with a horizonta
Citrus2011 [14]

Answer:

\triangle x=3.2*10^-^5 m

Explanation:

From the question we are told that

Height of circular cylinder is h= 1.8m

Diameter of cylinderD=4cm=>0.04m

Horizontal Force  F=900N

Y = 10.0 *10^1^0 N/m^2 \\B = 9.0 * 10^1^0 N/m^2\\S = 4.0 * 10^1^0 N/m^2\\

Generally the formula for shear modulus is mathematically represented by

G=\frac{\tau}{\gamma}

Where

G=Shear modulus\\\tau= shear\ stress\\\gamma=shear strain

G=\frac{F/A}{\triangle x/L}

G=\frac{900/\pi r^2}{\triangle x/1.8}

4.0*10^1^0=\frac{900/\pi r^2}{\triangle x/1.8}

4.0*10^1^0=\frac{900}{\pi r^2}  *\frac{1.8}{\triangle x}

{\triangle x} =\frac{1620}{\pi r^2* 4.0*10^1^0}

\triangle x=3.2*10^-^5 m

5 0
3 years ago
A tennis balls in the air and the potential energy increases. At the same time, it’s kinetic energy___because the velocity____
KengaRu [80]

Answer:

A

Explanation:

More potential energy equals more kinetic

8 0
3 years ago
When a wire is made smaller, the resistance increases. Which happens to the electric current?
Lelu [443]

When a wire is made shorter, the resistance decreases.

When a wire is made thinner, the resistance increases.

8 0
4 years ago
Polarized light is incident on three polarizing filters in a row. The initial intensity of the light is 4 W/m^2. The first filte
DiKsa [7]

Answer:

45°

Explanation:

I = Polarized light after 3 filter = 0.5 W/m²

I_0 = Initial light intensity = 4 W/m²

The intensity of polarized light is given by

I=I_0cos^2Acos^245cos^245\\\Rightarrow A=cos^{-1}\sqrt{\dfrac{I}{I_0cos^245cos^245}}\\\Rightarrow A=cos^{-1}\sqrt{\dfrac{0.5}{4\times cos^245\times cos^245}}\\\Rightarrow A=45^{\circ}

Hence, the angle relative to the vertical was the light initially polarized is 45°

4 0
3 years ago
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