NEET (NTA)-National Eligibility cum Entrance Test (Medical) Physics: Questions 109 - 114 of 2184

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Passage

Three of the fundamental constants of physics are the universal gravitational constant, G = 6.7 x 10 -11 m 3 kg -1 s -2, the speed of light, c = 3.0 x 10 8 m/s, and Planck’s constant,

h = 6.6 x 10 -34 kg m 2 s -1.

Question number: 109 (2 of 2 Based on Passage) Show Passage

» Physics and Measurement » Dimensions of Physical Quantities

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Question

Find the value of Planck time in seconds

The universal gravitational constant, G = 6.7 x 10 -11 m 3 kg -1 s -2, the speed of light, c = 3.0 x 10 8 m/s, and Planck’s constant, h = 6.6 x 10 -34 kg m 2 s -1.

Choices

Choice (4) Response

a.

1.3 10 - 43 s

b.

1.3 10 -33 s

c.

2.3 10 -13 s

d.

Question does not provide sufficient data or is vague

Passage

When an airplane flies, its total velocity with respect to the ground is v total = v plane + v wind’ where v plane denotes the plane’s velocity through motionless air,

And v wind denotes the wind’s velocity. Crucially, all the quantities in this equation are vectors. The magnitude of a velocity vector is often called the “speed. ”

Consider an airplane whose speed through motionless air is 100 meters per second (m/s). To reach its destination, the plane must fly east.

The “heading” of a plane is in the direction in which the nose of the plane points. So, it is the direction in which the engines propel the plane.

Question number: 110 (1 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

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Let denote the answer of above question. The plane has what speed with respect to the ground?

Choices

Choice (4) Response

a.

(100 m/s)

b.

c.

d.

(100 m/s)

Question number: 111 (2 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

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The pilot maintains an eastward heading while a 20 m/s wind blows northward. The plane’s velocity is deflected from due east by what angle?

Choices

Choice (4) Response

a.

b.

c.

d.

All of the above

Question number: 112 (3 of 3 Based on Passage) Show Passage

» Kinematics » Average Speed and Instantaneous Velocity

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If the plane has an eastward heading, and a 20 m/s wind blows towards the southwest, then the plane’s speed is -

Choices

Choice (4) Response

a.

100 m/s

b.

more than 100 m/s

c.

more than 80 m/s but less than 100 m/s

d.

80 m/s

Question number: 113

» Kinematics » Scalars and Vectors » Scalar and Vector Products

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Question

Two forces Fl = 5i + l0j - 20k and F2 = 10i - 5j - l5k act on a single point. The angle between Fj and F2 is nearly

Choices

Choice (4) Response

a.

90°

b.

60°

c.

30°

d.

45°

Passage

A = 2i + j + k and B = i + j + k are two vectors.

Question number: 114 (1 of 3 Based on Passage) Show Passage

» Kinematics » Scalars and Vectors » Scalar and Vector Products

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The unit vector parallel to A is

Choices

Choice (4) Response

a.

b.

c.

d.