Answer:
Decreases
Explanation:
Ideal gas law:
PV = nRT
where P is absolute pressure,
V is volume,
n is number of moles,
R is gas constant,
and T is absolute temperature.
If V is constant and T decreases, then P must decrease.
Answer:
(a) %a, 10 A, 0.833 A
(b) 12 ohm
(c) $22.8
Explanation:
Power of toaster, P1 = 600 W
Power of iron, P2 = 1200 W
Power of bulb, P3 = 100 W
V = 120 V
As they are in household circuit, so they are connected in parallel, so the voltage is same for all.
(a) Use the formula P = V x i
Current in toaster, i1 = P1 / V = 600 / 120 = 5 A
Current in iron, i2 = P2 / V = 1200 / 120 = 10 A
Current in bulb, i3 = P3 / V = 100 / 120 = 0.833 A
(b) Resistance of heating element of iron is R2.
V = i2 x R2
120 = 10 x R2
R2 = 12 ohm
(c) Total energy consumed in 24 hours for 5 days
= (600 + 1200 + 100) x 24 x 5 = 228000 Wh = 228 KWh
Cost of 1 KWh = $0.1
Cost of 228 KWh = 0.1 x 228 = $22.8
Answer:
Periodic.
Explanation:
Electromagnetic waves is a propagating medium used in all communications device to transmit data (messages) from the device of the sender to the device of the receiver.
Generally, the most commonly used electromagnetic wave technology in telecommunications is radio waves.
Radio waves can be defined as an electromagnetic wave that has its frequency ranging from 30 GHz to 300 GHz and its wavelength between 1mm and 3000m. Therefore, radio waves are a series of repetitive valleys and peaks that are typically characterized of having the longest wavelength in the electromagnetic spectrum.
Basically, as a result of radio waves having long wavelengths, they are mainly used in long-distance communications such as the carriage and transmission of data.
Generally, a fixed speed is used for the propagation of traveling waves and this speed is usually denoted with the variable "v" or sometimes "c."
Furthermore, if the waveform of a traveling wave is repeated every time at specific intervals T, it is referred to as periodic wave.
Mathematically, the period of a traveling wave is given by the formula;

Where;
T is the time measured in seconds.
A jet fighter flies from the airbase A 300 km East to the point M. Then 350 km at 30° West of North.
It means : at 60° North of West. So the distance from the final point to the line AM is :
350 · cos 60° = 350 · 0.866 = 303.1 km
Let`s assume that there is a line N on AM.
AN = 125 km and NM = 175 km.
And finally jet fighter flies 150 km North to arrive at airbase B.
NB = 303.1 + 150 = 453.1 km
Then we can use the Pythagorean theorem.
d ( AB ) = √(453.1² + 125²) = √(205,299.61 + 15,625) = 470 km
Also foe a direction: cos α = 125 / 470 = 0.266
α = cos^(-1) 0.266 = 74.6°
90° - 74.6° = 15.4°
Answer: The distance between the airbase A and B is 470 km.
Direction is : 15.4° East from the North.