You will need rocks brick and water.
Answer:
D) 255pa
Explanation:
pressure= force/area
force = weight
weight= mass* gravitational acceleration
weight= 0.2kg*10m/s²
weight= 2N
area= πr² where r=1/2diameter
r=1/2diameter
r=1/2(10cm)
r=5cm or 0.05m
area= πr². where π 's approximate value is 3.14
area=3.14(0.05m)²
area=3.14 * 0.0025m²
area=0.00785m²
pressure= force/area
pressure=2N/0.00785m²
pressure=255pa approximately
Answer:
A magnets always have two poles (north and south), the unmagnetized rod can be identified using properties of the poles of a magnet.
Explanation:
The law of magnetism states that like poles repel, while unlike poles attract. The simple experiment here is to use two rods at a time, keeping one of the poles of the first rod constant, while changing the poles of the other rod.
When the two rods are magnets, attraction and repulsion would be observed between the rods. But for the case of unmagnetized rod and one of the magnetised rod, only attraction is observed between the poles.
Answer:
Vb = v/2
Half of the speed of Car A before the collision
Explanation:
This problem can be solved by using conservation of momentum.
Since car B was stopped before the collision and its mass is twice the mass of A:
Also, since it is an elastic collision, car A stops after hitting car B. Rewriting the equation:
Therefore, the speed of car B after the collision is half of the speed of car A before the collision (v)
Vb = v/2
A. Inertia once something is acted upon it, it will change.
