Answer:
Explanation:
30 N force is pulling total mass of 15 kg , so acceleration in the system of masses
= 30 / 15
= 2 m / s²
Let us now consider forces acting on 9 kg . 30 N is pulling it in forward direction . Tension T in the string attached to it is pulling it in reverse direction
so net force on it
30 - T
Applying Newton's law of motion on it
30 - T = mass x acceleration
30 - T = 9 x 2
30 - 18 = T
T = 12 N
Answer:

Explanation:
As we know that current density is ratio of current and area of the crossection
now we have

so the current through the wire is given as

now we have

here we have

now plug in the values in above equation

now we have


now plug in both limits as mentioned


here R = 2.11 mm


It depends on your weight, your hieght, and how fast you are falling
Answer:
3 Objects that carry instruments into the stratosphere to measure atmospheric conditions
Explanation:
Weather balloons are objects that carries instruments into the stratosphere to measure atmospheric conditions.
They are very important weather measuring device that helps meteorologists in their fore casts.
These balloons are specially designed for high altitudes. They carry very sensitive devices that are very useful in collecting information about temperature, precipitation, pressure e.t.c
I think it’s KE I could be wrong tho