An up quark (u) has a charge of +2/3 and a down quark (d) has a charge of -1/3. Which of the following describes a neutron?

A) uuu
B) uud
C) udd
D) ddd


C

Physics & Space Science

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What is the gravitational force on a 20-kg satellite circling the Earth (radius = 6.4 × 10^6 m, mass = 6.0 × 10^24 kg) with a period of 5.0 h?

a. 88 N b. 55 N c. 36 N d. 98 N e. 18 N

Physics & Space Science

Exhibit 14-1 A square of side is removed from one corner of a square sandwich that has sides of length L. The center of mass of the remainder of the sandwich moves from C to C'. ? ? Use this exhibit to answer the following question(s). Refer to Exhibit 14-1. The distance from C to C' is

A.

.

B.
.

C.
.

D.
.

E.
.

Physics & Space Science

The process of planet formation in the early solar system is best described by which of the following terms?

A) precipitation B) consolidation C) condensation D) crystallization

Physics & Space Science

An electron determined to be at y = 2.000 ± 0.0010 cm has what minimum uncertainty in velocity?

What will be an ideal response?

Physics & Space Science