Wave speed = (wavelength) x (frequency)
Wave speed = (0.5 m) x (2 /sec)
<em>Wave speed = 1 m/s</em>
Answer:
V = 6 m/s
Explanation:
Given that,
Initial speed of an object is 20 m/s
Final speed of an object is 10 m/s
Time, t = 5 s
We need to find the average speed of the object during these 5 seconds. Let it is equal to V. Here, time is same. The average speed is given by :
So, the average speed of the object is 6 m/s.
Answer:
F = 91.27 N
Explanation:
Parameters given:
Charge of alpha particle, q = +2.0e = 
= 
Charge of gold nucleus, Q = +79e = 
= 
Distance between the alpha particle and gold nucleus, r = 
Electric force is given as:
F = 
where k = Coulomb's constant
Therefore:
The electric force acting on the alpha particle when the alpha particle is from the gold nucleus is 91.27 N.
Answer: reliable
Explanation:
Reliable (marketing research) information is collected from questions (measurements) that are free from systematic or statistical error. An absence of systematic error implies that the respondents (i.e., the sampled people) who answer questions actually understand what the questions were asking.
You can make sure there's no change in volume by keeping
your gas in a sealed jar with no leaks. Then you can play with
the temperature and the pressure all you want, and you'll know
that the volume is constant.
For 'ideal' gases,
(pressure) times (volume) is proportional to (temperature).
And if volume is constant, then
(pressure) is proportional to (temperature) .
So if you increase the temperature from 110K to 235K,
the pressure increases to (235/110) of where it started.
(400 kPa) x (235/110) = 854.55 kPa. (rounded)
Obviously, choice-b is the right one, but
I don't know where the .46 came from.
