Answer:![\dfrac{\pi}{2} ms^{-1}](https://tex.z-dn.net/?f=%5Cdfrac%7B%5Cpi%7D%7B2%7D%20ms%5E%7B-1%7D)
Explanation:
Let
be the time required to make one revolution.
Let
be the radius of the circular path.
Let
be the distance travelled by ball in one revolution.
As we know,the distance travelled in one revolution is the circumference of the circle.
So,![d=2\pi r](https://tex.z-dn.net/?f=d%3D2%5Cpi%20r)
Given,![d=0.5m\\T=2sec](https://tex.z-dn.net/?f=d%3D0.5m%5C%5CT%3D2sec)
![d=2\times \pi \times 0.5=\pi m](https://tex.z-dn.net/?f=d%3D2%5Ctimes%20%5Cpi%20%5Ctimes%200.5%3D%5Cpi%20m)
Speed of an object moving is circular path is define as the ratio of distance travelled in one revolution to the time taken by the object to complete one revolution.
Let
be the speed of the ball.
![s=\frac{d}{T}=\frac{\pi }{2}ms^{-1}](https://tex.z-dn.net/?f=s%3D%5Cfrac%7Bd%7D%7BT%7D%3D%5Cfrac%7B%5Cpi%20%7D%7B2%7Dms%5E%7B-1%7D)
So,the speed of the ball is ![\frac{\pi }{2}ms^{-1}](https://tex.z-dn.net/?f=%5Cfrac%7B%5Cpi%20%7D%7B2%7Dms%5E%7B-1%7D)
Answer:
In a transverse wave, the motion of the medium (what the wave moves through—in this case, the spring) is perpendicular to the direction of the wave. So, each point of the spring moves up and down as the wave travels from left to right.
The correct answer is C. Observation
Explanation:
An observation is a statement a describes a phenomenon, which is the result of measuring the phenomenon or using the senses to collect information about it. Additionally, observations are part of the Scientific method because through observations it is possible to understand phenomena.
The sentence presented is an observation because this statement is the result of the researcher observing or measuring how fast kernels pops, which means the statement derives from studying a phenomenon. Also, this cannot be classified as a hypothesis because a hypothesis is a probable explanation, and it cannot be classified as an experiment because the experiment is the general method to prove or disprove a hypothesis.
Answer: The velocity of the proton after it has traveled a distance of 80 cm is 5.1 × 10^6 m/s
Explanation: Please see the attachment below
Answer:
66.8°C
Explanation:
dQ = m*cp*dT where:
m = mass of block
cp = specific heat of iron
dT = temperature change
-------
dQ = 3.5 10^4 J
cp = 0.45 Kj / Kg = 450 J / Kg
3.5 10^4 = 2.3 * 450 * dt-----dt = 35000 / 450 * 2.3 = 33.8 °
-------
Final temperature = 33 + 33.8 = 66.8 °C