B) c + 100 km/h
C) c – 100 km/h
D) depends on the temperature, but faster than the speed if the truck was not moving.
E) faster than if the truck was not moving, but impossible to calculate with the given information
Answer:
A) c
Explanation:
Speed of light is always constant irrespective of the wave source's motion and the observer's inertial frame of reference. So, no matter how fast the car is moving the speed of light will always be constant. The speed of light in air is around 299704644.54 m/s. The meter is also defined by the speed of light as 1 meter is the distance travelled by light in 1/299792458 second.
advantages
1.Less flooding
2.Less erosion
3.Return of natural ecosystems
disadvantages
1. People go hungry
2. People don't get the water they want
3. People don't get the land they want for homes
Human activities can increase the carrying capacity of the environment but can also cause environmental degradation and potential decrease in carrying capacity.
Human activities can have both advantages and disadvantages in terms of reducing their impact on the environment. One advantage is that development of food production methods and high-quality shelters can increase the carrying capacity of the environment, allowing more people to live. However, these technologies can also lead to environmental degradation, such as air pollution, water contamination, habitat loss, and climate change. The negative effects of increasing carrying capacity may even outweigh the positive ones, potentially decreasing the world's carrying capacity for human beings.
#SPJ2
Answer:
70.15 Joule
Explanation:
mass of man, m = 70 kg
intial length, l = 11 m
extension, Δl = 1.5 m
Let K is the spring constant.
In the equilibrium position
mg = K l
70 x 9.8 = K x 11
K = 62.36 N/m
Potential energy stored, U = 0.5 x K x Δl²
U = 0.5 x 62.36 x 1.5 x 1.5
U = 70.15 Joule
Energy cannot be created or destroyed, but it can be converted or changed into different forms.
B.
Energy can be created or destroyed, and it can be converted or changed into different forms.
C.
Energy cannot be created or destroyed, nor can it be converted or changed into different forms.
D.
Energy can be created or destroyed, but it can not be converted or changed into different forms.