Answer: 4.41 joules
Explanation:
Given that:
work is done by gravity = ?
Mass of pine cone (m) = 50g
Convert mass in grams to kilograms
Since 1000g = 1kg
50g = (50/1000) = 0.05kg
Height of tree (h) = 9 m
Apply the formula for work,
Work = mass x acceleration due to gravity x height
Acceleration due to gravity has a value of 9.8m/s^2
Work = mgh
Work = 0.05kg x 9.8ms^2 x 9m
Work = 4.41J
Thus, 4.41 joules of work is done by gravity.
Answer:
The carbon cycle plays a key role in regulating Earth's global temperature and climate by controlling the amount of carbon dioxide in the atmosphere. The greenhouse effect itself is a naturally occurring phenomenon that makes Earth warm enough for life to exist.
As the burning of fossil fuels and landscape alterations, such as deforestation and industrial agriculture, mobilize fossil carbon into the atmosphere, the earth's carbon cycle is pushed out of balance and climate changes. Human generated climate change is an enormous perturbation in the global carbon cycle.
Explanation:
<span>The wave oscillates in a single plane.Polarization of light is the process of transforming the unpolarized light into a polarized light in which the polarized light waves vibrates in a single plane by using reflection, refraction, and passing through nicol prism and tourmaline glass.
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<u>Answer:</u>
Specific Heat
<u>Explanation:</u>
Specific heat is the measurement which describes the amount of heat needed to raise the temperature of one gram of a material by one degree Celsius.
It is the amount of heat required per unit mass to raise the temperature by one degree Celsius. The relationship between heat and the temperature change is usually expressed as shown below:
Δ![T](https://tex.z-dn.net/?f=T)
where
= heat added,
= specific heat,
=mass; and
Δ
= change in temperature
Answer:
T = 764.41 N
Explanation:
In this case the tension of the string is determined by the centripetal force. The formula to calculate the centripetal force is given by:
(1)
m: mass object = 2.3 kg
r: radius of the circular orbit = 0.034 m
v: tangential speed of the object
However, it is necessary to calculate the velocity v first. To find v you use the formula for the kinetic energy:
![K=\frac{1}{2}mv^2](https://tex.z-dn.net/?f=K%3D%5Cfrac%7B1%7D%7B2%7Dmv%5E2)
You have the value of the kinetic energy (13.0 J), then, you replace the values of K and m, and solve for v^2:
![v^2=\frac{2K}{m}=\frac{2(13.0J)}{2.3kg}=11.3\frac{m^2}{s^2}](https://tex.z-dn.net/?f=v%5E2%3D%5Cfrac%7B2K%7D%7Bm%7D%3D%5Cfrac%7B2%2813.0J%29%7D%7B2.3kg%7D%3D11.3%5Cfrac%7Bm%5E2%7D%7Bs%5E2%7D)
you replace this value of v in the equation (1). Also, you replace the values of r and m:
![F_c=(2.3kg)(\frac{11.3m^2/s^2}{0.034})=764.41N](https://tex.z-dn.net/?f=F_c%3D%282.3kg%29%28%5Cfrac%7B11.3m%5E2%2Fs%5E2%7D%7B0.034%7D%29%3D764.41N)
hence, the tension in the string must be T = Fc = 764.41 N