B. Australia and Antarctica were a single landmass in the past.
Explanation:
The most likely explanation for why the fossils of this plant are found on these two continents is that Australia and Antarctica were a single landmass in the past.
This evidence is vastly supported by the theory of plate tectonics originally, the theory of continental drift.
- Plate tectonics proposes that all land masses were once joined together as a single supercontinent called Pangaea.
- The region of Antartica and Australia were once joined as a single continental mass.
- The plant must have developed together at that time.
- When the continents moved apart, they still had the fossils.
learn more:
Continental drift brainly.com/question/5002949
#learnwithBrainly
Explanation:
As we know that the maximum of thermal energy will be converted into mechanical energy.( The thermal energy will be given to us by engine.)
But the total thermal energy will not be converted into the mechanical energy, there will be some lost of energy. The lost of mechanical energy will be in multiple forms. 2 of them are
1.Heat : The mechanical energy heats up the engine and then it will lost some energy.
2.Noise : Some energy also lost in the sound or the noise comes out from the engine. It will consume some energy.
Also, the engine never be 100% efficient some amount of energy lost in environment also.
Answer:
The decrease in Kinetic energy is 0.0107 Joules
Explanation:
Given
Mass of grasshoppers
Let m1 = Mass of grasshopper 1
Let m2 = Mass of grasshopper 2
Let u1 = initial speed of grasshopper 1
Let u2 = initial speed of grasshopper 2
m1 = 250g = 0.25kg
m2 = 130g = 0.13kg
u1 = 15cm/s = 0.15m/s
u2 = 65cm/s = 0.65m/s
First, we calculate the final velocity of the grasshoppers after collision using conservation of momentum.
Using
m1u1 + m2u2 = (m1 + m2) * v
Where v = final velocity
By substituton
0.25 * 0.15 + 0.13 * 0.65 = (0.25 + 0.13) * v
0.0375 + 0.0845 = 380v
0.122 = 0.38v
Make v the subject of formula
v = 0.122/0.38
v = 0.321 m/s
Calculating the Kinetic energies before and after impact.
Before collision;
KE = ½m1u1²+ ½m2u2²
KE = ½(m1u1² + m2u2²)
By substituton;
KE = ½(0.25 * 0.15² + 0.13 * 0.65²)
KE = 0.030275J
After collision:
KE = ½(m1+m2)v²
KE = ½(0.25 + 0.13) * 0.321²
KE = 0.01957779 J
Change in kinetic energy = ∆KE
∆KE = 0.030275J - 0.01957779J
∆KE = 0.01069721J
∆KE = 0.0107 J --- Approximately
Hence the decrease in Kinetic energy is 0.0107 Joules
The net force on q2 will be 1.35 N
A force in physics is an effect that has the power to alter an object's motion. A mass-containing object's velocity can vary, or accelerate, as a result of a force. Intuitively, a push or a pull can also be used to describe force. Being a vector quantity, a force has both magnitude and direction.
Given Particles q1, q2, and q3 are in a straight line. Particles q1 = -5.00 x 10-6 C,q2 = +2.50 x 10-6 C, and q3 = -2.50 x 10-6 C. Particles q₁ and q2 are separated by 0.500 m. Particles q2 and q3 are separated by 0.250 m.
We have to find the net force on q2
At first we will find Force due to q1
F = 9 × 10⁹ × 5 × 10⁻⁶ × 2.5 × 10⁻⁶ / 0.5²
F = 450 × 10⁻³
F₁ = 0.45 N (+)
Now we will find Force due to q2
F = 9 × 10⁹ × 5 × 10⁻⁶ × 2.5 × 10⁻⁶ / 0.25²
F = 1800 × 10⁻³
F₂ = 1.8 N (-)
So net force (F) will be
F = F₂ - F₁
F = 1.8 - 0.45
F = 1.35 N
Hence the net force on q2 will be 1.35 N
Learn more about force here:
brainly.com/question/25573309
#SPJ10
Answer: electronegativity
Explanation:
Electronegativity is defined as the property of an element to attract a shared pair of electron towards itself.
The size of an atom decreases as we move across the period because the electrons get added to the same shell and the nuclear charge keeps on increasing. Thus the electrons get more tightly held by the nucleus.
As, the size of an element decreases, the valence electrons come near to the nucleus. So, the attraction between the nucleus and the shared pair of electrons increases and thus the electronegativity increases.
