The string is needed to apply a torque to the ball.
Answer: Option A
<u>Explanation:</u>
To rotate any object in a circle, the most important factors are force and perpendicular distance around the center. The product of these two factors produces torque, i.e. Forces x vertical distance. An object moving in a circle must exert an internal force to achieve internal acceleration.
In this case, the string is needed for the ball to rotate, because that makes the ball go in a circle. This is done by dragging the object to the center of the circle.
Answer:
4.13×10^22 atoms
Explanation:
1. Find number of moles
mole=mass/rmm of compound
mole= 3.50/102
mole= 7/204 mol
2. Multiply it with avagadros constant( 6.02×10^23 particles)
7/204 × 6.02×10^23= 2.0657×10^22
3. Multiply it with the number of ALMINIUM ATOMS IN AL203( which is 2 atoms)
2.0657×10^22 × 2
you get 4.13×10^22 atoms
The wavelength of the sound wave if the frequency is increased to the given value is 0.44m.
Given the data in the question;
- Frequency of sound wave a;
- Wavelength of sound wave a;
Speed of sound wave;
- Frequency of sound wave b;
Wavelength of sound wave b;
<h3>Wavelength</h3>
Wavelength is simply the distance over which the shapes of waves are repeated. It is the spatial period of a periodic wave.
It is expressed as;
Where v is velocity and f is frequency.
First, we calculate the velocity of the sound wave in air from sound wave a.
Now, we determine the wavelength of sound wave b using the velocity of sound wave in air calculated above.
Therefore, the wavelength of the sound wave if the frequency is increased to the given value is 0.44m.
Learn more about wavelength: brainly.com/question/27120701
Answer:
D
Explanation:
im not sure but ive had this question before and im 99% sure its D