Answer:
Force = 4N
Explanation:
Workdone = force × distance
Force = Workdone/distance
Force =160/40 = 4N
Answer: I added a picture of the answer
Explanation: its right
Answer:
minimum speed v=
Explanation:
Recall the formula for centripetal force;
Centripetal force is the force that is required to keep an object moving in circular part

where;
F=centripetal force
m=mass of object
r=radius of curvature
v= minimum speed
To find minimum speed make v the subject of formula;
v=
I looked it up and here's what it said
To balance the charge of 80 protons this atom has<u> </u><u><em>a cloud of 80</em></u><em> </em>electrons spinning around its nucleus.
Answer:
I = 5[amp]
Explanation:
Electrical power is defined as the product of voltage by current.

where:
P = power = 1150 [W]
V = voltage = 230 [V]
I = current [amp]
Now replacing:
![1150=230*I\\I=1150/230\\I=5[amp]](https://tex.z-dn.net/?f=1150%3D230%2AI%5C%5CI%3D1150%2F230%5C%5CI%3D5%5Bamp%5D)
A 15 [amp] fuse must be used. Always the fuse must be larger than the operating current, to protect the equipment from very high currents. above 15 [amp]