Does a soccer ball go faster in the air on a cold or hot day?

994

Consider earth's equator is covered with a measuring tape touching the ground such both the ends touch each other. if the tape is lifted 1 meter from the ground, what would be the distance between two ends of tape?

2003

What is speed of sound at sea level?

1028

-100 mmWC means how much kg/cm2

1716

Explain optical telescopes?

961

How do you find the refractive index of a liquid by using total internal reflection?

889

What is meant by energy spectrum of a black body? : quantum physics

871

What does the mev in mev photon mean?

1027

Explain nuclear fusion?

1013

Does water drain counterclockwise in the northern hemisphere and clockwise in the southern hemisphere?

910

I’ve heard that in quantum physics a lot of fancy mathematical objects like hilbert spaces are used, and that in particular, measurable quantities are described by self-adjoint operators. Are these things related to what you have just explained? : quantum physics

987

How many more times louder is 70 decibels than 10 decibels?

961

For two objects separated by a distance d, if the mass of one of the objects is doubled, what will happen to the gravitational attraction between them?

1021

In general, alternating voltage varies between its maximum and minimum values 50 times per cycle. Why don't the circuit element show such fluctuation?

2547

A color made from the addition of two primary colors is called:

1099