Answer:
64.1°C
Explanation:
mass of automobile, M = 1500 kg
velocity, v = 35 m/s
mass of each brake, m = 8 kg
specific heat of iron, c = 448 J/kg°C
According to the conservation of energy
the kinetic energy of automobile = thermal energy of brakes
0.5 Mv² = 4 x m x c x ΔT
where, ΔT is the rise in temperature of the brake
0.5 x 1500 x 35 x 35 = 4 x 8 x 448 x ΔT
ΔT = 64.1°C
Thus, the change in temperature of each brake is 64.1°C.
Answer:
Green
Explanation:
Green plants have the ability to make their own food. They do this through a process called photosynthesis, which uses a green pigment called chlorophyll. A pigment is a molecule that has a particular color and can absorb light at different wavelengths, depending on the color
-A Distance-Time Graph Shows The Distance Travelled By An Object Over Time.
-The Steepness Of The Line (Gradient) Shows The Speed At Which The Object Is Moving.
-The Steeper The Graph, The Faster The Object Is Moving.
_ Flat Section Are When An Object Stopped.
_ Downhill Section Means Its Moving Faster Towards Its Starting Point.
_ A Steepening Curve Means The Object Is Accelerating.
_ A Curve Gradually Increasing Means The Object Is Slowing.
I hope this isn't too late!