Mix Test 1

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Mix Test 1

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Weekly Quiz Competition

Question 1
1 / -0

Matter waves are useful in

A
explaining gravitational phenomenon

B
explaining tidal wave phenomenon

C
explaining quantum mechanical phenomenon

D
explaining astronomical phenomenon

Solution

Explanation:

Matter waves are also termed as De Broglie waves because they were initially introduced by him. All matters behave like a wave (during motion) and in there propagation there is action of forces due to collision between the particles, some time torque also exists, hence all the matters waves were consider to be a helpful part for understanding quantum.
Question 2
1 / -0

in longitudinal waves, the constituents of the medium

A
oscillate at 30^º to the direction of wave propagation

B
oscillate perpendicular to the direction of wave propagation

C
oscillate along the direction of wave propagation.

D
oscillate at 40^º to the direction of wave propagation

Solution

Explanation:

In longitudinal wave motion, medium particles oscillates or vibrates in same direction of wave propagation to produce compression & rarefaction in wave propagation.
Question 3
1 / -0

Internal energy of a system is

A
a complex variable

B
a random variable

C
a state variable

D
a discrete variable

Solution

Explanation:

A state function describes the equilibrium state of a system. For example, internal energy, enthalpy, and entropy are state quantities because they describe quantitatively an equilibrium state of a thermodynamic system, irrespective of how the system arrived in that state.
Question 4
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The importance of the elastic behavior of materials is

A
that it enables a safe and sound design of bridges, buildings, machinery parts.

B
that it gives methods for understanding materials

C
that it is useful in building sling shots

D
that it is useful in making springs

Solution

Explanation:

More the elastic a material is , more it has the property to regain its original position which is required in construction works.
Question 5
1 / -0

Stress is

A
total applied force

B
force per unit length

C
force per unit area

D
three point average of forces
Question 6
1 / -0

According to Kepler’s Law of periods, The _______________ of the time period of revolution of a planet is proportional to the cube of the ___________ of the ellipse traced out by the planet

A
cube, semi-major axis

B
cube, semi-major axis

C
square, semi-major axis

D
square, semi-minor axis

Solution

Explanation:

Kepler's 3^rd Law: T²= a³. Kepler's 3rd law is a mathematical formula. It means that if you know the period of a planet's orbit (T = how long it takes the planet to go around the Sun), then you can determine that planet's distance from the Sun (a is the length of the semimajor axis of the planet's orbit)
Question 7
1 / -0

The total mechanical energy of a system is conserved if the

A
forces, doing work on it, are viscous

B
forces, doing work on it, are conservative

C
forces, doing work on it, are not conservative

D
forces, doing work on it, are damped

Solution

Explanation:

Mechanical energy is the sum of kinetic and potential energy in an object that is used to do work. In other words, it is energy in an object due to its motion or position, or both. In case of conservative forces total mechanical energy remains conserved because potential energy applicable only for conservative forces.

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Re-Attempt Weekly Quiz Competition

Mix Test 1

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Mix Test 1

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SHARING IS CARING

Question 1

explaining gravitational phenomenon

explaining tidal wave phenomenon

explaining quantum mechanical phenomenon

explaining astronomical phenomenon

Solution

Question 2

oscillate at 30º to the direction of wave propagation

oscillate perpendicular to the direction of wave propagation

oscillate along the direction of wave propagation.

oscillate at 40º to the direction of wave propagation

Solution

Question 3

a complex variable

a random variable

a state variable

a discrete variable

Solution

Question 4

that it enables a safe and sound design of bridges, buildings, machinery parts.

that it gives methods for understanding materials

that it is useful in building sling shots

that it is useful in making springs

Solution

Question 5

total applied force

force per unit length

force per unit area

three point average of forces

Question 6

cube, semi-major axis

cube, semi-major axis

square, semi-major axis

square, semi-minor axis

Solution

Question 7

forces, doing work on it, are viscous

forces, doing work on it, are conservative

forces, doing work on it, are not conservative

forces, doing work on it, are damped

Solution

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oscillate at 30^º to the direction of wave propagation

oscillate at 40^º to the direction of wave propagation