What should Isla write in the areas marked A, B, and C?
2 answers:
Answer:
Radio waves: have a longer wavelength
X-rays: have a higher frequency
Both: they travel at the same speed
Explanation:
Missing part of the question:
"Isla made a diagram to compare x-rays and radio waves. what should isla write in the areas marked a, b, and c?"
X-rays and radio waves are both types of electromagnetic waves.
Electromagnetic waves consist of oscillations of the electric and the magnetic fields in a plane perpendicular to the direction of propagation the wave.
All electromagnetic waves travel in a vacuum always at the same speed, the speed of light:
Electromagnetic waves are also classified into 7 different types, according to their wavelength/frequency. From longest to shortest wavelength (and from lowest to highest frequency, since frequency is inversely proportional to wavelength), they are:
Radio waves (>1 m)
Microwaves (1 mm - 1 m)
Infrared (750 nm - 1 mm)
Visible light (380 nm - 750 nm)
Ultraviolet (10 nm - 380 nm)
X-rays (0.01 nm - 10 nm)
Gamma rays (<0.01 nm)
Therefore, the correct matches are:
Radio waves: have a longer wavelength
X-rays: have a higher frequency
Both: they travel at the same speed
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Answer:
1) It expresses the rate (top speed) at which it can move with time.
2) P = 20 W
3) h = 18 km
Explanation:
1) Power is the rate of transfer of energy.
⇒ Power =
i.e P =
Thus a car's engine power is 44000W implies that the engine of the car can propel the car at this rate. This expresses the rate (top speed) at which it can move with time.
2) m = 400g = 0.4 kg
t = 20 s
h = 100m
g = 10 m/
P =
=
=
P = 20 W
3) u = 600 m/s
g = 10 m/
From the third equation of free fall,
=
- 2gh
V is the final velocity, U is the initial velocity, h is the height.
0 = - 2 x 10 x h
0 = 360000 - 20h
20h = 360000
h =
= 18000
h = 18 km
The maximum height of the bullet would be 18 km.