<em>F</em> = 153 N
Explanation:
Let us define first our directional convention. Anything pointing up or to the right is considered positive and anything pointing down or to the left is considered negative. Now let's look at the components and :
= 350 N - 200 N = 150 N
= 180 N - 150 N = 30 N
The magnitude of the resultant force <em>F</em> is given by
To find the direction , we use
or
Answer:
Explanation:
Kinetic energy at the height = 1/2 m v²
= 1/2 x 750 x 20²
= 150000 J
Its potential energy = mgh
= 750 x 9.8 x 5
=36750 J
Total energy = 186750 J
Its total kinetic energy will be equal to 186750 J , according to conservation of mechanical energy
If v be its velocity at the bottom
1/2 m v² = 186750
v = √498
= 22.31 m /s
Answer:
A battery is a device that stores chemical energy and converts it to electrical energy.
The chemical reactions in a battery involve the flow of electrons from one material (electrode) to another, through an external circuit.
The flow of electrons provides an electric current that can be used to do work.
To balance the flow of electrons, charged ions also flow through an electrolyte solution that is in contact with both electrodes.
Different electrodes and electrolytes produce different chemical reactions that affect how the battery works, how much energy it can store and its voltage.
Answer:
40g
Explanation:
Solubility of Copper sulfate at 90°=60g
Solubility of potassium bromide at 90°=100g
100g-60g=40g
A planetary nebula is more common to occur than a supernova. It actually is a nebula, meaning mist or cloud but was called planetary nebulae by others because it looked like a planet.
Supernova is a not a usual event to take place.