Using the wave equation v = fλ, we can find λ = v/f = 340/170 = 2 m.

Wavelength (λ) = Speed (v) / Frequency (f) = 340 m/s / 1700 Hz = 0.2 m.

Using the wave equation v = fλ, we can find the wavelength: λ = v/f = 340 m/s / 1700 Hz = 0.2 m.

Using the wave equation v = fλ, we can find the wavelength: λ = v/f = 340 m/s / 680 Hz = 0.5 m.

Using the wave equation v = fλ, we can find the wavelength: λ = v/f = 340/170 = 2 m.

Sound travels faster in water than in air, so its speed increases when it enters water.

Wavelength λ = v/f = 340 m/s / 1700 Hz = 0.2 m.

Wavelength λ = v/f = 340 m/s / 170 Hz = 2 m.

Wavelength λ = v/f = 340 m/s / 1700 Hz = 0.2 m.

Wavelength = Speed / Frequency = 340 m/s / 1700 Hz = 0.2 m.

Wavelength λ = v/f = 343 m/s / 686 Hz = 0.5 m.

Wavelength (λ) = speed (v) / frequency (f) = 340 m/s / 1700 Hz = 0.2 m.

Using the formula v = fλ, we can rearrange to find λ = v/f. Thus, λ = 340 m/s / 1700 Hz = 0.2 m.

The wavelength λ is given by λ = v/f. Thus, λ = 340/170 = 2 m.

Frequency (f) = speed (v) / wavelength (λ) = 340 m/s / 0.85 m ≈ 400 Hz.

The frequency f can be calculated using the formula v = fλ. Rearranging gives f = v/λ = 340 m/s / 0.85 m ≈ 400 Hz.

Using the formula λ = v/f, where v is the speed and f is the frequency, we have λ = 340 m/s / 1700 Hz = 0.2 m.

Using the wave speed formula v = f * λ, we can rearrange to find λ = v/f. Thus, λ = 343 m/s / 686 Hz = 0.5 m.

Wavelength λ = v/f = 1500 m/s / 300 Hz = 5 m.

K.E. = 0.5 * m * v², percentage error = 2 * (Δv/v) = 2 * (0.5/20) = 0.05 or 5%.

The absolute error is given directly as ±0.5 m/s.

Percentage error = (Absolute error / Measured value) * 100 = (2 / 60) * 100 = 3.33%

Kinetic energy = 0.5 * m * v²; uncertainty in KE = 2 * v * uncertainty in v = 2 * 30 * 0.5 = 30 J.

Surface area of a sphere = 4πr² = 4π(7)² = 4π(49) = 196 cm².

The total mechanical energy at the top is purely potential energy, which is mgh.

Using conservation of energy, the potential energy at height h converts to kinetic energy at the bottom, giving speed √(2gh).

The total kinetic energy of a rolling sphere is the sum of translational and rotational kinetic energy, which is (1/2)mv^2 + (2/5)mv^2.

The angular speed ω of a rolling sphere is given by ω = v/R.

The electric potential inside a charged spherical conductor is constant and equal to the potential on its surface, which is Q/(4πε₀R).

The electric potential V on the surface of a charged spherical conductor is given by V = kQ/R.