The tree tops on the distant horizon are all red ____ the rays of the setting sun.

Often before sunrise on a clear, calm, cold morning, ice (frost) can be seen on the tops of parked cars, even when the air temperature is above freezing. This condition happens because the tops of the cars are cooling by:

A

Conduction

B

Convection

C

Latent heat

D

Radiation

A

The growth of new rings in a trees is not a function of levels of precipitation.

B

Only the Brazilaian ash loses rings because of excessive heat.

C

One day of temperatures above 95 degrees Fahrenheit will cause the Brazilian ash to lose one ring.

D

The internal rings of all tress are of uniform thickness

The sun's intense rays 'distorted' the image on the horizon .

A

reflected

B

melted

C

altered

D

disrupted

The golden rays of the setting sun fall _____the water and tings them with goleden colour.

A

of

B

from

C

in

D

on

There are 87 balls in a jar. Each ball is painted with at least one of two colors, red or green. It is observed that 2/7 of the balls that have red color also have green color, while 3/7 of the balls that have green color also have red color. what fraction of the balls in the jar has both red and green colors?

A

6/14

B

2/7

C

6/35

D

6/29

তড়িৎ রাসায়নিক কোষের emf = ?i.E0Anodee(ox)+E0cathode(Red)ii.E0cathode(Red)-E0Anodee(Red)iii.E0Anodee(ox)-E0cathode(Red)কোনটি সঠিক?

A

i ও ii

B

i ও iii

C

ii ও iii

D

i, ii ও iii

তড়িৎ রাসায়নিক কোষের emf = ?i. E° Anode(ox) + E°Cathode (Red) 11. E Cathode(Red) - E°Anode (Red) 111. E° Anode(ox) - E°Cathode (Red) নিচের কোনটি সঠিক?

A

i ও ii

B

i ও iii

C

ii ও iii

D

i, ii ও iii

When the Sun is near the horizon during the morning or evening, it appears reddish. The phenomenon that is responsible for this observation is

A

Reflection of light

B

Refraction of light

C

Dispersion of light

D

Scattering of light

124λ তরঙ্গদৈর্ঘ্যের এক রঙা এক্সরে একটি কার্বণ ব্লক দ্বারা বিক্ষিপ্ত হয়। 180° তে এক্সবের বিক্ষিপ্ত বিকিরণের তরঙ্গদৈর্ঘ্যের মান নির্ণয় কর।(A monochromatic X-rays of wavelength 0.124λ is scattered by a carbon block. Find the wavelength of X-rays scattered through 180°)

A

0.0484 λ

B

0.1724 λ

C

0.0756 λ

D

0.0242 λ

E

0.0968 λ

The angle of elevation of the sun, when the length of the shadow of a tree is equal to the height of the tree, is:

A

30°

B

60°

C

45°

D

None of these

The tree tops on the distant horizon are all red ____ the rays of the setting sun.

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