Tag: science & technology

Questions Related to science & technology

If an object is placed in water and sinks, it is because it has no buoyancy force acting on it.
general knowledge science & technology

  1. True

  2. False

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Correct Option: B

We often tend to fall backwards when a bus, carrying us, just starts moving. It happens because of:
general knowledge science & technology

  1. Gravity of the earth.

  2. Inertia of our bodies.

  3. Friction between our feet and the floor of the bus.

  4. Our lack of balance while experiencing sudden change of movement.

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Correct Option: B

When a person uses a simple machine, such as a lever or a pulley, the work or energy output from the simple machine becomes (neglect any potential energy that may have been previously stored in the machine) :
general knowledge science & technology

  1. higher than the work or energy input by the person

  2. equal to the work or energy input by the person

  3. lower than the work or energy input by the person

  4. both b & c can happen

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Correct Option: C

Under typical conditions, ice melts and water freezes at the same temperature.
general knowledge science & technology

  1. True

  2. False

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Correct Option: A

Voltage is the force which pushes electrons through wires.

general knowledge science & technology

  1. True

  2. False

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Correct Option: B

Two 90-decibel sound sources are turned on at the same time. Together they create a 180-decibel sound level.

general knowledge science & technology

  1. True

  2. False

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Correct Option: B

Jane reads that passing a current of 100 milliamps through a person’s body from one hand to the other can be fatal. She accidentally grabs the positive terminal of her car’s battery in one hand and the negative in the other. Her car has a 12-volt battery rated for 100 amps. What will happen to her
general knowledge science & technology

  1. Nothing

  2. She'll be electrocuted and die.

  3. She'll get a mild shock.

  4. It will depend on other factors.

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Correct Option: A

Ben travels to a distant planet. In outerspace, with essentially no gravity, he can throw a baseball (mass = 0.5 kg) and a shot put (mass = 4 kg) at the same speed with no discernable difference in effort.

general knowledge science & technology

  1. True

  2. False

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Correct Option: B

The force between your feet and the floor is greater while standing on your tiptoes than while standing flat on your feet.

general knowledge science & technology

  1. True

  2. False

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Correct Option: B

Running a ceiling fan in an enclosed room during the summer will (assuming no heat transfer in or out):

general knowledge science & technology

  1. make the room cooler.

  2. slowly raise the room’s temperature.

  3. make no difference in temparature.

  4. it will depend on the size of the room.

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Correct Option: B