In the solar interior energy is transferred by conduction and convection conduct
ID: 284786 • Letter: I
Question
In the solar interior energy is transferred by
conduction and convection
conduction and radiation
radiation and convection
radiation alone
Which of the following statements is not correct?
A. An object on Earth experiences a greater force from the Sun than from the Moon
B. The Earth experiences greater tidal forces from the Sun than from the Moon
C. Spring tides occur when the solar and lunar tides correspond
D. Neap tides occur when the solar tide partly cancels the lunar tide
All four Jovian planets
have their spin axes approximately perpendicular to their orbital planes
are made almost entirely (about 99%) of hydrogen and helium
are thought to have a rocky core
D. have a large part of their interior composed of liquid metallic hydrogen
Compared to the Sun, a white dwarf star is
larger and hotter
smaller and hotter
larger and cooler
smaller and cooler
The presence of disks of gas and dust around protostars is
a theoretical concept which has not been confirmed by observations
a theoretical concept which has been confirmed by observations
an observational result which cannot be explained by current theories of star formation
a phenomenon which is not supported by either theory or observation
The shell of a planetary nebula is measured by the Doppler shift of emission lines to be expanding outward at a speed of 8 km/s and its diameter is measured to be 1 light year (which is about 9.46 1012 km). How long has the shell been expanding?
19,000 years
8 million years
19 million years
8,000 years
conduction and convection
B.conduction and radiation
C.radiation and convection
D.radiation alone
Explanation / Answer
1. answer : c . radiation and convection
Explanation : In Solar interior is mostly made by liquid hydrogen and gas. The convection heat transfer is occur by the motion of heated material and radiation transfer energy by electromagnetic waves.
Conduction occur in solid material and it less in sun because it made mainly by gases and liquids of hydrogen and helium
2. ans : b) The Earth experiences greater tidal forces from the Sun than from the Moon.
Explanation : Most of the earth tidal force occure by moon than sun, because the distance between the earth and moon is less compare to earth sun distance.
3. ans : D. have a large part of their interior composed of liquid metallic hydrogen.
Explanation : All the juvian planetes has less density compare to inner planets so the scientists tought tht the planets may be made with liuid hydrogen core.
4. c. Larger and cooler
Explanation : stars combine to form the white dwart planet and it is 8 times larger than sun. At the time of formation of the sun it is very hot but it grdually becomes cooler than sun.