Determine the values of the amplitude and wavelength, respectively, of the wave.
8 cm; 27 cm
8 cm; 9 cm
4 cm; 9 cm
16 cm; 27 cm
Correct answer is B
No explanation has been provided for this answer.
Which of the following statements about the universal gravitational constant, G, is true?
It is fundamental quantity
It has dimension M-¹L³T-²
Its S.I. unit is N m\(^2\)kg
It is a vector quantity
Correct answer is B
The universal Gravitational constant(G) is a scalar quantity as it is not in a particular direction.
dimensional formula =M-¹L³T-²
S.I. unit = Nm\(^2\)/kg\(^2\)
A current of 2A passes through a wire of resistance 4Ω for 3 minutes. Calculate the energy lost
960J
1440J
2880J
48J
Correct answer is C
Power = current[I]\(^2\) * Resistance[R] → 2\(^2\) * 4 → 4 * 4 = 16watts
time = 3minutes → 3 * 60 = 180s
Energy = power * time → 16 * 180 = 2880j
4.5cm
5.0cm
7.5cm
20.0cm
Correct answer is A
volume of cylinder = \(\pi r^2h\)
volume of cylinder p = \(\pi r^2 \times 10\)
= 10\(\pi r^2\)
volume of cylinder Q = \(\pi (2r)^2 h\)
= 4\(\pi r^2\)h
4\(\pi r^2 = 10 \pi r^2 h\)
h = \(\frac{10}{4} = 4.5cm\)
In what modulus is it true that 9 + 8 = 5?
mod 10
mod 11
mod 12
mod 13
Correct answer is C
9 + 8 = 17
17 + mod 12 = 1 rem 5
it is mod 12
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