Answer:
Explanation:
infrared waves and ultra violet (UV) waves
infrared is a light that we can feel as heat. it's just below the red spectrum that we can see with our eyes. We tend to think of infrared as a red light but it's really not in our red spectrum of vision, it's below that, or the wave lengths are longer than red light is .
Ultra violet (UV) is much higher energy. we don't "feel" that but it's much more powerful than infrared. it's above the blue/ purple spectrum that our eyes can see or the wave lengths is shorter than what we can see in the highest visible spectrum that we can see. Because the wave lengths are shorter there is much more energy in the wave. It's destructive to us, even, and why we put on UV block, sun screen. :P
Answer:
637 km/h, not reasonable
Explanation:
Total average speed = 91 km/h
Average speed of first half, v1 = 49 km/h
Let the average speed for the next half is v2.
Let the total distance is 2s.
Time taken for first half of the journey, t1 = s / v1 = s / 49
Time take for the next half of the journey, t2 = s / v2
The average speed is defined as the total distance traveled to the total time taken
[tex]\frac{1}{v_{2}}=\frac{7}{4459}
v2 = 637 km/h
This is very high speed which is not reasonable.
Answer:
K =6.697 Kg/s²
Explanation:
Given:
delta m =41 g = 0.041 kg
delta x = 6cm = 0.06m
g = 9.8 m/s²
according to the given formula
K = delta m g /delta x
K = (0.041 kg × 9.8 m/s²) / 0.06m
K =6.697 Kg/s²
Answer:
25 m
9.9 m/s
22 m/s
Explanation:
m = Mass of ball
v = Velocity
g = Acceleration due to gravity = 9.81 m/s²
Applying conservation of energy
The height above the ground is 5.09683+20 = 25.09683 m = 25 m
The ball's speed as it passes the window on its way down is 9.9 m/s
The speed of impact on the ground is 22 m/s