An alpha particle is another name for a(n) __________

Fill in the blank(s) with correct word


helium nucleus

Physics & Space Science

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Identical point charges (+30 ?C) are placed at the corners of a rectangle (4.0 m × 6.0 m). How much external energy is required to bring a charge of 55 ?C from infinity to the midpoint of one of the 6.0-m long sides of the rectangle?

A. 22 J B. 16 J C. 13 J D. 19 J E. 8.0 J

Physics & Space Science

Three solid, uniform, cylindrical flywheels, each of mass 65.0 kg and radius 1.47 m, rotate independently around a common axis through their centers

Two of the flywheels rotate in one direction at 8.94 rad/s, but the other one rotates in the opposite direction at 3.42 rad/s. Calculate the magnitude of the net angular momentum of the system. A) 1020 kg ? m2/s B) 1500 kg ? m2/s C) 975 kg ? m2/s D) 940 kg ? m2/s

Physics & Space Science

Sediments that are composed of solid fragments derived from preexisting rocks are called ______________ sediments

Fill in the blank(s) with correct word

Physics & Space Science

The water behind Grand Coulee Dam is 1200 m wide and 160 m deep. Find the hydrostatic force on the back of the dam. (Hint: the total force = average pressure × area)

a. 5.2 × 10^9 N c. 13.2 × 10^10 N b. 8.8 × 10^10 N d. 15.1 × 10^10 N

Physics & Space Science