Answer:
Option (D) is correct.
Explanation:
The balloon lands horizontally at a distance of 420 m from a point where it as released.
Velocity of air balloon along +X axis =10 m/s
velocity of ball=4 m/s along + X axis
the velocity of balloon gets added to the velocity of ball. So the resultant velocity of the balloon=10+4 = 14 m/s
time taken= 30 s
The distance traveled is given by d= v t
d= 14 (30)
d= 420 m
Thus the balloon lands horizontally at a distance of 420 m from a point where it as released.
I believe it’s the first one
<h2>
Electric field at the location of the charge is 1250 N/C</h2>
Explanation:
Electric field is the ratio of force and charge.
Force, F = 3.00 mN = 3 x 10⁻³ N
Charge, q = 2.40 μC = 2.40 x 10⁻⁶ C
We have
![E=\frac{F}{q}\\\\E=\frac{3\times 10^{-3}}{2.40\times 10^{-6}}\\\\E=1250N/C](https://tex.z-dn.net/?f=E%3D%5Cfrac%7BF%7D%7Bq%7D%5C%5C%5C%5CE%3D%5Cfrac%7B3%5Ctimes%2010%5E%7B-3%7D%7D%7B2.40%5Ctimes%2010%5E%7B-6%7D%7D%5C%5C%5C%5CE%3D1250N%2FC)
Electric field at the location of the charge is 1250 N/C
Answer= D. Velocity includes a direction; speed does not.
Velocity and speed both have the same units of m/s, so answers A and B are wrong.
Velocity is a vector quantity and so has direction and magnitude, so C is wrong.
Speed is a scalar quantity, only having magnitude and no direction.
Answer:
Option C is correct
Explanation:
A supersaturated solution is one that has more solute dissolved than the solution should hold at that temperature.
Examples include carbonated water, sugar syrup, honey.
A solution of a chemical compound can be dissolved in heated water to prepare a supersaturated solution. A solution becomes supersaturated as its temperature is changed.