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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Two isotopes have the same __________ number
Fill in the blank(s) with correct word
Physics & Space Science
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
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