Rub each of two inflated toy balloons with wool or fur. Will they attract each other or repel each other? Explain why


They will repel each other. They have like charges.

Physics & Space Science

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Which of the following types of stars are suitable for advanced life?

A) A-type B) F-type C) O-type D) K-type

Physics & Space Science

What change in wavelength is expected when X-rays are scattered at 90°?

A) no change at this angle B) 4.84 × 10-3 nm C) 2.42 × 10-3 nm D) 1.18 × 10-3 nm E) 3.75 × 10-3 nm

Physics & Space Science

Two isotopes have the same __________ number

Fill in the blank(s) with correct word

Physics & Space Science

From what height above the surface of the earth should an object be dropped to initially experience an acceleration of 0.54g? (G = 6.67 × 10-11 N ? m2/kg2, Mearth = 5.97 × 1024 kg, Rearth = 6.38 × 106 m)

A) 2300 km B) 1700 km C) 5400 km D) 2900 km

Physics & Space Science