Which of the following statements is TRUE?

Physics

1 answer:

Thepotemich [5.8K]2 years ago

6 0

Answer:

-Frequency is inversely related to period f = 1/T

Explanation:

wavelength is measured in length units such as meters, feet, cm, furlong, miles.

-Increasing the amplitude of a wave increases the loudness (in sound waves).

-A compression wave vibrates in a direction that is aligned to the direction of the wave motion.

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A boat of mass 250 kg is coasting, with its engine in neutral, through the water at speed 1.00 m/s when it starts to rain with i

Vera_Pavlovna [14]

Answer:

Explanation:

1. We use the conservation of momentum for before the raining and after. And also we take into account that in 0.5h the accumulated water is

100kg/h*0.5h = 50kg

$p_{b}=p_{a}\\M_{b}v_{b}=(M_{b}+m_{r})v_{a}\\v_{a}=\frac{M_{b}v_{b}}{M_{b}+m_{r}}=\frac{250kg*1\frac{m}{s}}{250kg+50kg}=0.83\frac{m}{s}$

2. the momentum does not conserve because the drag force of water makes that the boat loses velocity

3. If we assume that the force of the boat before the raining is

$F=ma=m\frac{v-v_{0}}{t-t_{0}}=250kg\frac{1m}{s^{2}}=250N$

where we have assumed that the acceleration of the boat is 1m/s{2} just before the rain starts

And if we take the net force as

$F_{net}=M_{b}a_{net}=F-F_{d}=250N-bv^{2}\\F_{net}=250N-0.5N\frac{s^{2}}{m^{2}}(1\frac{m}{s})^{2}=249.5N\\a_{net}=\frac{249.5N}{M_{b}}=\frac{249.5N}{250kg}=0.99\frac{m}{s^{2}}$

where we take v=1m/s because we are taking into account tha velocity just after the rain stars.

I hope this is useful for you

regards

5 0

2 years ago

Match the layers of the atmosphere with the description that best matches it according to the graph titled Temperature Profile.

Finger [1]

The correct matches are as follows:

Troposphere
A) Layer closest to the Earth where all weather occurs

Mesosphere
C) temperature remains constant as elevation increases

Mesopause
D) temperature remains at a constant zero degrees Celsius as elevation increases

Stratosphere
E) begins between 50-60km and decreases in temperature as elevation increases 

Stratopause
 B) temperature increases as elevation increases

Hope this answers the question. Have a nice day.

3 0

2 years ago

Read 2 more answers

Now, using your mass (in kg), and the figures for g (in the table below), you can calculate your weight on other planets.

Licemer1 [7]

Answer:

1) Weight on Mercury

$F =W=mg=68.11 \times 3.61 m.s^{-2}$