The answer is C. Any physical property can be observed without changing the identity of the substance. That’s one of the main things that separates a physical and chemical property.
Answer:
Explanation:
Kinetic energy of block will be converted into heat energy by friction .
Heat energy produced = 1/2 m v²
= .5 x 4.8 x 1.2²
= 3.456 J
85% of energy is converted into heat energy , so heat energy produced
= .85 x 3.456 = 2.9376 J .
If Q heat is given to m mass of object having s as specific heat and Δt is increase in temperature
Q = msΔt
specific heat of iron s = 462 J / kg C
Putting the values ,
2.9376 = 4.8 x 462 x Δt
Δt = 13.24 x 10⁻⁴ ⁰C.
Answer:
15116.4 V
Explanation:
B = Earth's magnetic field at the location = 
L = Length of the wire = 
v = Velocity of the shuttle = 
The emf generated is given by

The motional emf generated between the ends of the wire is 15116.4 V
That all depends on the angle between the two forces.
It could be anything between 1.3 m/s² in the direction of the larger force, if
they're in opposite directions, all the way around to 6.04 m/s² in the direction
of both of them if they're both in the same direction.
That includes magnitudes between 1.3n and 6.04n directed somewhere between
the two forces if they're in different, unrelated directions.