Answer:
The distance is 19.58 m.
Explanation:
Given that,
Mass = 3.0 kg
Radius = 1.3 m
Angular speed = 6.8 rad/s
Angle = 24°
Acceleration of gravity = 9.81 m/s²
We need to calculate the distance
Using formula of kinetic energy
Total Initial kinetic energy,
....(I)
Now, Total potential energy
....(II)
Equating equation (I) and (II)
Hence, The distance is 19.58 m.
He proposed the scientific method. He thought it was best to base a theory on observation instead of think of a theory and then try to prove it. So the answer would be A.
Answer: Green house effect is the process affected by the absorption of the thermal energy from the sun.
Explanation:
Green house effect is the process in which the thermal energy is received from the sun. This thermal energy warms the earth's surface. Some sun's energy reaches the Earth's atmosphere and some are reflected to the space. The rest is mostly absorbed by the water vapor and carbon dioxide and some are re-radiated by the green house gases.
This effects maintains the earth's temperature.
Therefore, green house effect is the process affected by the absorption of the thermal energy from the sun.
Answer:
-140
Explanation:
A gas loses 80joules of heat.
The gas also does 60 joules of work
Therefore the change in internal energy can be calculated as follows
= -80 + (-60)
= -80-60
= -140
Hence the change in internal energy is -140
She can put chalk in vinegar as the vinegar will disintegrate the chalk chemically demonstrating chemical changes. But for physical changes she can break the chalk into small pieces by smashing it with something or her hand.