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Contact [7]
3 years ago
8

A constant magnetic field can be used to produce an electric current. True or False?

Physics
1 answer:
Umnica [9.8K]3 years ago
6 0

this question is true

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If the force of gravity changes, what happens to the weight of an object?
Nataly [62]
The "weight" is the name we give to the force of gravity on the object. They're the same thing.
7 0
3 years ago
The rubidium isotope 87Rb is a β emitter that has a half-life of 4.9 ✕ 1010 y that decays into 87Sr. It is used to determine the
fredd [130]

Answer:

t = 39.04 1010 year

Explanation:

This is a nuclear disintegration exercise that is governed by the equation.

     N = N0 e (-lam t)

The average life time is related to nuclear activity

      T ½ = ln 2 / lam

Let's use these two equations for exercise, let's start by finding nuclear activity

     Lam = ln 2 / T ½

     Lam = ln 2 / 4.9 10 10

    Lam = 0.14146 10-10 y-1

They tell us that the relationship atoms

      No / N = 0.0040

Let's look

       No / N = 1/0040

       N/No = 250                                                                                                                                                                                

Let's calculate the time

       (-lam t) = ln (N / No)

,        t = - 1 / lam ln (n / No)

        t = - 1 / 0.14146 10-10 ln (250)

        t = 39.04 1010 year

4 0
2 years ago
How many neutrons are in an isotope of selenium-83<br><br> A. 34<br> B. 83<br> C. 49<br> D. 117
pishuonlain [190]

Answer:

C.49 is yr ans...

<h2>hope it helps</h2><h2>stay safe healthy and happy....</h2>
4 0
2 years ago
Read 2 more answers
What is the overall function of the circulatory system and how do the organs of this system work together to achieve this goal?
ale4655 [162]

Answer:

The main purpose of the circulatory system is to transport blood, oxygen, nutrients and hormones to and from different cells and tissues throughout the body.

Explanation:

This system works hand-in-hand with the respiratory system to facilitate the exchange of oxygen and carbon dioxide within the blood per the alveoli in the lungs.

8 0
2 years ago
What is the speed of a wave that has a frequency of of 3.7 * 10 ^ 3 Hz and a wavelength of 1.2*10^ -2 m?
ale4655 [162]

Answer:

44.4m/s

Explanation:

v = (3.7*10 ^3) ( 1.2 * 10 ^ -2)

= 44.4 m/s

6 0
3 years ago
Read 2 more answers
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