Physics, 26.07.2019 15:40 20emmanuelg1030

Uranium-238 has a half-life of 4.5 billion years. if earth is about 4.5 billion years old, which statement is true? a. in about 4.5 billion years, there will be the same amount of uranium-238 as there is today. b. about 4.5 billion years ago, there was half as much uranium-238 as there is today. c. about 4.5 billion years ago, there was twice as much uranium-238 as there is today. hell mm

Answers: 1

Show answers

Another question on Physics

Physics, 21.06.2019 22:30

According to the tide table below what time of day will the highest tide occur?

Answers: 1

Answer

Physics, 22.06.2019 10:30

Aperson gives a shopping cart an initial push along a horizontal floor to get it moving, and then lets go. the cart travels forward along the floor, gradually slowing as it moves. consider the horizontal force(s) on the cart while it is moving forward and slowing. which of the following statements is correct? (a) both a forward and a backward force are acting on the cart, but the forward force is larger. (b) only a forward force is acting which diminishes with time. (c) both a forward and a backward force are acting on the cart, but the backward force is larger. (d) only a backward force is acting, no forward force.

Answers: 3

Answer

Physics, 23.06.2019 08:30

Acertain half-reaction has a standard reduction potential e_red^0 = -0.94 v. an engineer proposes using this half-reaction at the cathode of a galvanic cell that e must provide at least 1.00 v of electrical power. the cell will operate under standard conditions. a. is there a minimum standard reduction potential that the half-reaction used at the anode of this cell can have? b. is there a maximum standard reduction potential that the half-reaction used at the anode of this cell can have?

Answers: 1

Answer

Physics, 23.06.2019 19:20

In a region of space, a magnetic field points in the +x-direction (toward the right). its magnitude varies with position according to the formula bx=b0+bx, where b0 and b are positive constants, for x≥0. a flat coil of area a moves with uniform speed v from right to left with the plane of its area always perpendicular to this field. part a what is the emf induced in this coil while it is to the right of the origin?

Answers: 3

Answer

You know the right answer?

Uranium-238 has a half-life of 4.5 billion years. if earth is about 4.5 billion years old, which sta...

Questions