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4 years ago

PLEASE HELP NOW!! Which of the following must be the same for two isotopes of an element?

Physics

2 answers:

luda_lava [24]4 years ago

8 0

<<<<<<<<<< B is the answer >>>>>>>

Masteriza [31]4 years ago

7 0

B. The atomic number

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Help please help me with all of it I don't know nothing. bless ur hearts <br>

Evgesh-ka [11]

Answer:

200 , 0 , 133.33333

Explanation:

velocity = change of X / change of T

400/2 = 200

0/2 = 0

400/3 = 133.33333

3 0

3 years ago

A comet is in an elliptical orbit around the Sun. Its closest approach to the Sun is a distance of 4.6 multiply 1010 m (inside t

Doss [256]

We will apply the concepts related to energy conservation to develop this problem. In this way we will consider the distances and the given speed to calculate the final speed on the path from the sun. Assuming that the values exposed when saying 'multiply' is scientific notation we have the following,

$d_1 = 4.6*10^{10}m$

$v_i = 9.3*10^4m/s \rightarrow \text{Initial velocity comet}$

$d_2 = 6*10^{12}m$

The difference of the initial and final energy will be equivalent to the work done in the system, therefore

$E_f = E_i +W$

$K_f +U_f = K_i +U_i + 0$

$\frac{1}{2} mv_f^2+\frac{-GMm}{d_2} = \frac{1}{2} mv_i^2+\frac{-GMm}{d_1}$

Here,

m = Mass

$v_f$ = Final velocity

G = Gravitational Universal Constant

M = Mass of the Sun

m = Mass of the comet

$v_i$ = Initial Velocity

Rearranging to find the final velocity,

$v_f = \sqrt{v_i^2+2GM(\frac{1}{d_2}-\frac{1}{d_1})}$

Replacing with our values we have finally,

$v_f = \sqrt{(9.3*10^4)+2(6.7*10^{-11})(1.98*10^{30})(\frac{1}{6*10^{12}}-\frac{1}{4.6*10^{10}})}$

$v_f = 75653.9m/s$

Therefore the speed is 75653m/s

8 0

4 years ago

"Pluto Is Changing" talks about sheets of frozen nitrogen on Pluto. Tell what is happening to these sheets of ice

drek231 [11]

What is Pluto is changing exactly <span />

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4 years ago

All of the following are reasons that psychologists use a systematic method to conduct research except __________.

Over [174]

Answer: To help eliminate subjectivity

Explanation:

Edgenuity 2020

8 0

3 years ago

State any two precautions taken to ensure accurate result on simple pendulum<br>

galben [10]

Explanation:

1) The bob of pendulum should be displaced with a small angle. 2) The amplitude of the oscillation of a simple pendulum should be small. 3) Fans should be switched off to reduce the air resistance. 4)The simple pendulum should be oscillate in a vertical plane only.Feb 23, 2019

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3 years ago