5 looks like ohm's law R=V/I ...If my arithmetic works, that's R=36 ohms ???
resistors in series is ADD THEM.
Im not sure about controlled parameters, but i can explain how variables work. There are different types of variables. An independent one is the thing you change every time you do the experiment. Dependent variables are what you keep the same every time you do the experiment. (i hope this somewhat helped)
Answer:
(a) The velocity is 12 m/s.
(b) The average force is 18 000N.
Explanation:
(a) The principle of conservation of momentum,
total momentum before = total momentum after
- = +
But, the initial velocities equal zero,
= = 0
So that,
0 = +
Substituting the values of variables given in the question,
0 = 1 × + 0.02 × 600
0 = + 12
= - 12 m/s
Thus, the velocity is 12 m/s.
(b) F = ma
From the third equation of motion,
= + 2as
a = -
=
= -900, 000 m/s^2
a = 900, 000 m/s^2
The acceleration is 900 Km/s^2.
F = 0.02 × 900000
= 18 000 N
Thus, the average force is 18 000N.
Answer:
1. 75N
2. 67,983 J (=67.98 kJ)
Explanation:
1. Work = Force x Distance
we are given that Work = 1,500J and Distance = 20m
hence,
Work = Force x Distance
1,500 = Force x 20
Force = 1,500 ÷ 20 = 75N
2. Potential Energy, PE = mass x gravity x change in height
we are given that mass = 165 kg and change in height = 42m
assuming that gravity, g = 9.81 m/s²
Potential Energy, PE = mass x gravity x change in height
Potential Energy, PE = 165 x 9.81 x 42 = 67,983 J (=67.98 kJ)
<span>The bright, visible surface of the Sun is called corona. The outermost layer of the Sun's atmosphere is called chromosphere.</span>