A physics student stands on the rim of the canyon and drops a rock. The student measures the time for it to reach the bottom to

A bathroom scale operates under gravitational influence. Typically, a reading is captured when your body applies force onto the scale. Yet in this scenario, as both you and the scale move downwards, your body ceases to press against the scale. Consequently, the result is:

<span>The scale reading will instantly drop to zero</span>

Response: a) 0.04 kW = 40 W

b) 0.05

Explanation:

A)

The thermal efficiency of the power cycle is calculated as Input / Output

Input = 10 kW + 14,400 kJ/min which translates to 10 kW + 14,400 kJ/(60s) = 10 kW + 14,400/60 kW.

Output equals 10 kW

Thus, Thermal Efficiency = Output / Input = 10 kW / 250 kW = 0.04 kW = 40 W

B)

Maximum Thermal Efficiency of the power cycle is defined as 1 - T1/T2

where T1 = 285 Kelvin

and T2 = 300 Kelvin

Thus, Maximum Thermal Efficiency = 1 - T1/T2 = 1 - 285/300 = 0.05

Answer:

The tension in the string when the speed increased is 134.53 N

Explanation:

Given;

Tension in the string, T = 120 N

initial speed of the transverse wave, v₁ = 170 m/s

final speed of the transverse wave, v₂ = 180 m/s

The wave speed is expressed as;

where;

μ represents mass per unit length

The new tension T₂ will be computed as;

Consequently, the tension in the string when the speed was increased is 134.53 N

Answer:

a)

b) D does not influence the long-term results.

Explanation:

Given that

A = A0 cos(ωt)

This is a linear equation hence the integration factor, I

Now using the characteristics of linear equations

b) At t= 0

Thus, the initial condition

does not affect the long-term outcome.

The tension calculated is 236 N. The formula for tension is T = mg + ma. With the following values: m = 20 kg, g = 9.8 m/s², and a = 2.0 m/s², we find T = m(g + a) = 20(9.8 + 2.0) = 20(11.8) = 236 N.