Answer:
Explanation:
given,
radius of earth = 6378 km
distance separating the center of the earth and moon = 384400 km
we know acceleration due to gravity
hence, the weight of earth compared to the your weight on earths surface is equal to 2 × 10⁻⁴ g.
Answer:
Explanation:
Thermal conductivity of human skin K = 21 W / m²
Formula for heat conduction
Q = KA ( θ₂ - θ₁) / d
A is surface area , θ₂ - θ₁ is temperature difference , d is thickness .
Putting the values
175 = 21 x 1.5 x .70 / d
d = .126 m
= 12.6 cm .
Answer:
The options are not properly punctuated.
(a) cognitively impaired (b) using holophrases which is developmentally appropriate (c) language-delayed and needs professional assistance (d) trying to manipulate his father and needs to be disciplined
The correct answer is (b) using holophrases which is developmentally appropriate
Explanation:
Holophrases are one of the single-word utterances characteristic of children in the early stages of language acquisition, it is the use of a single word to express a complex idea. Holophrases are normal among toddlers within the age of two years below.
Hence the the use of "cup" by the toddler to express his intent for a cup of milk is referred to as holophrases which is developmentally appropriate
Answer:
3 Ω
Explanation:
I find a calculator with a reciprocal key quite useful for calculating parallel resistance.
Req = 1/(1/r1 +1/r2 +... +1/rn))
Of course, resistors in series add.
The far right two branches are 10 Ω in parallel with (8+2) Ω = 10 Ω. Of course, the parallel combination of two equal-value resistors is half the value of either of them. Thus the two right branches resolve to 5 Ω, which is then added to 1 Ω to give an effective middle section that is 12 Ω || 4 Ω || 6 Ω.
That combination has an effective resistance of ...
Req = 1/(1/12 +1/4 +1/6) = 1/(1/12 + 3/12 +2/12)) = 12/6 = 2 . . . ohms
This is effectively in series with the upper left 1 Ω resistor, so the equivalent load on the source is 1+2 = 3 Ω.
Answer:
Apply this to waves: count the number of waves passing each second (= frequency), and multiply by the length of each (= wavelength) to find the speed. speed = distance/time = l/T= l / (1/f) = f λ. Work through three examples: A simple example, perhaps for sound in air, with values in Hz and m.
Explanation:Apply this to waves: count the number of waves passing each second (= frequency), and multiply by the length of each (= wavelength) to find the speed. speed = distance/time = l/T= l / (1/f) = f λ. Work through three examples: A simple example, perhaps for sound in air, with values in Hz and m.
Amplitude is the fluctuation or displacement of a wave from its mean value. With sound waves, it is the extent to which air particles are displaced, and this amplitude of sound or sound amplitude is experienced as the loudness of sound
But it seems that in some circumstances, sound can jump between objects in a vacuum after all. Sound waves are travelling vibrations of particles in media such as air, water or metal. So it stands to reason that they cannot travel through empty space, where there are no atoms or molecules to vibrate.