Answer:
Cooler
Explanation:
when you drive from city to farm the temperature of the farm is cooler than the temperature in the city.
this is because in city the population is very high as compare to the farms so, the activity of the city is also high which lead to increase the energy consumption of the area.
air pollutants, green house gases are also present more in the city which leads to increase the temperature of the city.
this effect is called urban heat island effect.
b. gamma ray.
c. microwave.
d. ultraviolet wave.
The cars coupled and rolled together at a speed of 1.5 m/s.
According to the law of conservation of linear momentum, the sum of the momentum before and after the collision must be equal.
m₁ u₁ + m₂u₂ = m₁ v₁ + m₂ v₂
where m₁ and m₂ is the mass of the collided objects, u₁ and u₂ are their initial speed while v₁ & v₂ is their final speed.
The linear momentum of an object can be defined as the product of the mass of the object times the velocity of that object. Conservation of momentum is a property held by an object where the total amount of momentum never changes.
Given the initial velocity of the car is u₁ = 2 m/s and the other car is u₂ = 1 m/s.
The masses of both cars is identical, m₁ = m₂ = m
From the law of conservation of momentum, find the speed of coupled cars (v),
m₁ u₁ + m₂ u₂ =m₁ v₁ + m₂v₂
m × 2 + m ×1 = m × v + m × v
2 + 1 = 2 v
2v = 3
v = 1.5 m/s
Therefore, the speed of the coupled cars is equal to 1.5 m/s.
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a note higher than middle c has the greatest frequency. Hence option D is correct.
Wave is is a disturbance in a medium that carries energy as well as momentum . wave is characterized by amplitude, wavelength and phase. Amplitude is the greatest distance that the particles are vibrating. especially a sound or radio wave, moves up and down. Amplitude is a measure of loudness of a sound wave. More amplitude means more loud is the sound wave.
Wavelength is the distance between two points on the wave which are in same phase. Phase is the position of a wave at a point at time t on a waveform. There are two types of the wave longitudinal wave and transverse wave.
Hence option D is correct.
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Answer:
a note higher than middle c
Explanation:
Answer:
1124923453 electrons
Explanation:
The formula for charge in coulomb ,C =Current in amperes, A * Time in seconds, s
Given in question ;
Charge = 1.6 * 10⁻¹⁹ C
Current = 2.0 nA = 2*e⁻⁹ A
Calculate time in seconds as
1.6 * 10⁻¹⁹ = 2*e⁻⁹ * t
1.6 * 10⁻¹⁹ /2*e⁻⁹ = t
6.48e⁻¹⁶ s = t
So using t=6.48e⁻¹⁶ s and current =2*e⁻⁹ A , the charge will be;
C = 2*e⁻⁹ * 6.48e⁻¹⁶ =1.799e⁻¹⁰ C
But 1 coulomb = 6.25 x 10¹⁸ electrons
so 1.799e⁻¹⁰ C = ?,,,,{ 6.25 x 10¹⁸} *{1.799e⁻¹⁰} = 1124923453.06 electrons