Answer:
Explanation:
Volume of lead object = volume of aluminium object = V
mass of lead object > mass of aluminium object
When both the objects immersed in water, the buoyant force acting on both the objects.
Buoyant force = Volume immersed x density of water x gravity
As the volume of both the objects is same, so the buoyant force acting on both the objects is same.
So, weight in air of lead object is more than the weight in air of aluminium object.
Answer: Two glass marbles bounce off each other.
Explanation:Elastic collisions are collisions in which both momentum and kinetic energy are conserved. The total system kinetic energy before the collision equals the total system kinetic energy after the collision. If total kinetic energy is not conserved, then the collision is referred to as an inelastic collision.
An elastic collision occurs when the two objects "bounce" apart when they collide. Two rubber balls are a good example. In an elastic collision, both momentum and kinetic energy are conserved. Almost no energy is lost to sound, heat, or deformation.
<span>Water will diffuse down gradients of water potential, just as heat will flow down gradients of temperature and rocks will roll down gradients of gravitational potential</span>
Answer:
0.33 mV or 0.00033 V
Explanation:
Parameters given:
Radius, r = 4 cm = 0.04 m
Number of turns, N = 1
Initial magnetic field, Bini = 0.069 T
Final magnetic field, Bfin = 0.043 T
Time, t = 0.4 secs
EMF induced in a coil is given as the time rate of change of Magnetic Flux:
EMF = -ΔΦ/t
ΔΦ = ΔB * A
Where ΔB = change in magnetic field
A = area = pi * r²
EMF = -[(Bfin - Bini) * N * pi * r²] / t
EMF = -[(0.043 - 0.069) * 1 * 3.142 * 0.04²] / 0.4
EMF = 0.00033 V = 0.33 mV