Physics
A ball is thrown vertically upward from the ground. It crosses a point at the height of 25 m twice at an interval of 4 seconds. The ball was thrown with the velocity of

36 m/s
25 m/s
18 m/s
30 m/s

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Physics
Isotopes of an element contain

the same number of neutrons but different number of protons
equal number of nucleons
equal number of protons and electrons
the same number of protons but different number of neutrons

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Physics
Analog synthesis refers to a technology based on

Representing data in terms of measurable physical quantities.
Representing physical quantities as numbers.
Placing brief digital recordings of live sounds under the control of a synthesizer keyboard.
Interfacing synthesizer equipment.

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