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Kisachek [45]
2 years ago
5

A particle in a 799=m-long linear particle accelerator is moving at 0.875C. How long does the particle accelerator appear to the

particle?
Physics
1 answer:
barxatty [35]2 years ago
6 0

the answer is 386m because m = pi mc=2.23

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A freshly prepared sample of radioactive isotope has an activity of 10 mCi. After 4 hours, its activity is 8 mCi. Find: (a) the
Maurinko [17]

Answer:

(a). The decay constant is 1.55\times10^{-5}\ s^{-1}

The half life is 11.3 hr.

(b). The value of N₀ is 2.38\times10^{11}\ nuclei

(c). The sample's activity is 1.87 mCi.

Explanation:

Given that,

Activity R_{0}=10\ mCi

Time t_{1}=4\ hours

Activity R= 8 mCi

(a). We need to calculate the decay constant

Using formula of activity

R=R_{0}e^{-\lambda t}

\lambda=\dfrac{1}{t}ln(\dfrac{R_{0}}{R})

Put the value into the formula

\lambda=\dfrac{1}{4\times3600}ln(\dfrac{10}{8})

\lambda=0.0000154\ s^{-1}

\lambda=1.55\times10^{-5}\ s^{-1}

We need to calculate the half life

Using formula of half life

T_{\dfrac{1}{2}}=\dfrac{ln(2)}{\lambda}

Put the value into the formula

T_{\dfrac{1}{2}}=\dfrac{ln(2)}{1.55\times10^{-5}}

T_{\dfrac{1}{2}}=44.719\times10^{3}\ s

T_{\dfrac{1}{2}}=11.3\ hr

(b). We need to calculate the value of N₀

Using formula of N_{0}

N_{0}=\dfrac{3.70\times10^{6}}{\lambda}

Put the value into the formula

N_{0}=\dfrac{3.70\times10^{6}}{1.55\times10^{-5}}

N_{0}=2.38\times10^{11}\ nuclei

(c). We need to calculate the sample's activity

Using formula of activity

R=R_{0}e^{-\lambda\times t}

Put the value intyo the formula

R=10e^{-(1.55\times10^{-5}\times30\times3600)}

R=1.87\ mCi

Hence, (a). The decay constant is 1.55\times10^{-5}\ s^{-1}

The half life is 11.3 hr.

(b). The value of N₀ is 2.38\times10^{11}\ nuclei

(c). The sample's activity is 1.87 mCi.

4 0
3 years ago
Can a object have have zero velocity and nonzero acceleration?
vladimir1956 [14]

Answer:

yes

Explanation:

3 0
3 years ago
Help ASAP 100 points
Gwar [14]

Answer:

other galaxies is red shifted

Question 5 (1 point)

What does a blue shift in light from stars indicate?

Question 5 options:

The stars are moving randomly.

The stars are moving closer.

The stars are moving farther away.

The stars are stationary

7 0
3 years ago
Hello people ~
Pepsi [2]

Answer:

Potential

Explanation:

The most accurate term is Electrostatic potential energy

  • It is denoted as UC

It's named like this because the force between charges or electrons is called electrostatic force .

5 0
2 years ago
A stone whirled at the end of the a rope 30cm long, makes 10 complete resolution in 2 seconds Find: A. The angular velocity in r
lord [1]

Answers:

A: Angular velocity \omega=31.40 \frac{r a d}{s}

B: Linear velocity v=9.42 \frac{m}{s}

C: Linear Distance d=47.1 \mathrm{m}

Given:

Radius of the rope r=30cm=0.3m

Angular distance\Delta \theta=10 revolutions

Time taken t=2seconds

To find:

A: Angular velocity in radians

B: Linear speed

C: Distance covered in 5 seconds

<u>Step by Step Explanations:</u>

Solution:

A: Angular velocity in radians;

According to the formula, Angular velocity can be calculated as

Angular Velocity = angular distance/ time

\omega=\Delta \theta / \Delta t

Where \omega=Angular velocity

\Delta \theta=Angular distance=10 revolutions

Changing revolutions to radians multiply with 2 \pi, so that we get

=10 \times 2 \pi

=10 \times 2(3.14)  

=62.80 rad/rev

\Delta t =Change in time

Substitute the known values in the above equation we get

\omega=62.80 / 2  

\omega=31.40 \frac{r a d}{s}

B. Linear speed of the rope;

As per the formula

Linear speed = angular speed × radius

v=\omega \times r  

Where \omega=Angular velocity

v=Linear speed of the rope

r=Radius of the rope

Substitute the known values in the above equation we get

v=31.40 \times 0.30

v=9.42 \frac{m}{s}

C. Dsitance covered in 5 seconds;

Linear distance = linear speed × time

d=v \times t

Where d= Linear distance of the rope

v=Linear speed of the rope

t=Time taken

Substitute the known values in the above equation we get

d=9.42 \times 5

d=47.1 \mathrm{m}

Result:

Thus A: Angular velocity of the rope \omega=31.40 \frac{r a d}{s}

B Linear speed of the rope v=9.42 \frac{m}{s}

C: Distance covered in 5 seconds d=47.1 \mathrm{m}

6 0
3 years ago
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