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A mixer-grinder has an efficiency of 65 percent. If the output work is 50 joules, what is the amount of input work required?

What is newton's third law second law first law?

What is the deffination of "The spinning of Earth on its axis"

What are the two main types of waves?

Consider a closed circuit with a 9-volt battery connected in series to a light bulb with a resistance of 3 ohms. What is the current flowing through the light bulb?

Which is a concern about mining for uranium? Heated water could be released into the environment. Dust released in the air could be radioactive. Supplies could become low during a drought. It is too commonly found, and mines could be too plentiful.

What is the main optical element of a refracting telescope?

Two water manometers are connected to a tank of air. One leg of the manometer is open to 100kPa pressure (absolute) while the other leg is subjected to 90kPa. Find the difference in deflection between both manometers, Delta h_a - Delta h_b.

Most geologists believe that the dinosaurs became extinct 65 million years ago when a large comet or asteroid struck the earth, throwing up so much dust that the sun was blocked out for a period of many months. A.

If you drop a silver dollar off a building and it hits the ground in 10 seconds, how fast was the coin going just before it hit?

What is the weight of an with a mass of 32kg