If earth were to shrink suddenly, what would happen to the length of the day?

If the earth suddenly shirnks, what will happen to the length of the day?

What is the length of the radius of the earth?

What is the mass of the earth?

If a wave undergoes refraction, what happens to its phase?

A steel tape 1m long is correctly calibrated for a temperature of 27.0 ^@C . The length of a steel rod measured by this tape is found to be 63.0 cm on a hot day when the temperature is 45.0 ^@C . What is the actual length of the steel rod on that day? What Is the length of the same steel rod on a day when the temperature is 27.0 ^@C ? Coefficient of linear expansion of steel = 1.20xx10^-5 K^-1 .

If a capillary tube of insufficient length is dipped into a liquid, What will happen to the liquid rising?

What would happen if gravity suddenly disappears?

If the ice on the polar caps of the earth melts, how will it affect the duration of the day? Explain.

Two lenses 3D and -1.5 D were put in contact. What is the focal length of the combination?