Spiral Galaxies, Irregular Galaxies and Elliptical Galaxies?
I believe the answer is: C.)weight lifting twice a week
Weight lifting increase the muscle composition in your body. When you have higher muscle composition, your body would be able to generate more power which might resulted an increase in throwing distance.
Running every day would only increase endurance and stretching is only benefited to increase flexibility and prevent injuries.
Answer:
= 0.7 A,
= 1.3 A and ε = 7.4 V
Explanation:
From the given circuit, applying Kirchhoff's rule;
Ammeter reading,
= 2 A
⇒
=
+
= 2 A
Dividing the circuit to loops 1 and 2.
a. From loop 1,
15 + 7
- 5
= 0
15 + 7
- 10 = 0 (since
= 2 A)
7
- 5 = 0
= 0.7 A
But,
=
+ ![I_{2}](https://tex.z-dn.net/?f=I_%7B2%7D)
⇒ 2 = 0.7 + ![I_{2}](https://tex.z-dn.net/?f=I_%7B2%7D)
= 1.3 A
b. From loop 2,
ε + 2
- 5
= 0
ε + 2
- 10 = 0
ε + 2.6 - 10 = 0
ε - 7.4 = 0
ε = 7.4 V
Therefore,
= 0.7 A,
= 1.3 A and ε = 7.4 V.
Answer:
Explanation:
Given
Diameter of CD ![d=12.70\ cm](https://tex.z-dn.net/?f=d%3D12.70%5C%20cm)
radius ![r=6.35\ cm](https://tex.z-dn.net/?f=r%3D6.35%5C%20cm)
mass of CD ![m=16.30\ gm](https://tex.z-dn.net/?f=m%3D16.30%5C%20gm)
Tangential velocity ![v_t=1.150\ m/s](https://tex.z-dn.net/?f=v_t%3D1.150%5C%20m%2Fs)
music detected at ![r'=20.90\ mm=2.090\ cm](https://tex.z-dn.net/?f=r%27%3D20.90%5C%20mm%3D2.090%5C%20cm)
Moment of Inertia of disc ![I=\frac{mr^2}{2}](https://tex.z-dn.net/?f=I%3D%5Cfrac%7Bmr%5E2%7D%7B2%7D)
![I=\frac{16.30\times 10^{-3}\times (6.35\times 10^{-2})^2}{2}](https://tex.z-dn.net/?f=I%3D%5Cfrac%7B16.30%5Ctimes%2010%5E%7B-3%7D%5Ctimes%20%286.35%5Ctimes%2010%5E%7B-2%7D%29%5E2%7D%7B2%7D)
![I=6.572\times 10^{-5} kg-m^2](https://tex.z-dn.net/?f=I%3D6.572%5Ctimes%2010%5E%7B-5%7D%20kg-m%5E2)
Work done is equal to change in kinetic Energy of CD
![W=\Delta K](https://tex.z-dn.net/?f=W%3D%5CDelta%20K)
![W=\frac{1}{2}I\omega_f^2-\frac{1}{2}I\omega_i^2](https://tex.z-dn.net/?f=W%3D%5Cfrac%7B1%7D%7B2%7DI%5Comega_f%5E2-%5Cfrac%7B1%7D%7B2%7DI%5Comega_i%5E2)
where
angular velocity
![v_t=\omega \times r](https://tex.z-dn.net/?f=v_t%3D%5Comega%20%5Ctimes%20r)
![W=\frac{1}{2}\times 6.572\times 10^{-5}\left ( \left ( \frac{1.15}{0.0209}\right )^2-0\right )](https://tex.z-dn.net/?f=W%3D%5Cfrac%7B1%7D%7B2%7D%5Ctimes%206.572%5Ctimes%2010%5E%7B-5%7D%5Cleft%20%28%20%5Cleft%20%28%20%5Cfrac%7B1.15%7D%7B0.0209%7D%5Cright%20%29%5E2-0%5Cright%20%29)
![W=0.0994\ J](https://tex.z-dn.net/?f=W%3D0.0994%5C%20J)