Question
If “+” means “minus”, “×” means “divided
by”, “÷” means “plus”, and “-“ means then “multiplied by” 180 × 12 – 8 + 32 ÷ 56Solution
180 ÷ 12 × 8 – 32 + 56 15 × 8 – 32 + 56 120 – 32 + 56 = 144
The half-life of a radioactive substance is 10 days. The time in which only 1/8th of the original substance remains is:
Which of the following phenomena cannot be explained by the wave theory of light?
What is the speed of sound in air at room temperature (20°C)?
A particle is moving in a uniform circular motion with constant speed v along a circle of radius r. The acceleration-of the particle is –
Which of the following quantities is a scalar?
Which of the following correctly ranks molecular speeds at a fixed temperature?
The time period of a second’s pendulum is –
When the speed of car is doubled, then what will be the braking force of the car to stop it in the same distance?
A train runs along an unbanked circular track of radius of 10 m at speed of 36 km/h. The mass of the train is 16 kg.
What is the an...
In an electric motor, energy is transformed from:
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