3 years ago

The answer can not be C or D its between A and B

Physics

1 answer:

Murrr4er [49]3 years ago

8 0

If the answer is not C D then is A bc of the way it crosses over

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A bicyclist of mass 60kg supplies 340W of power while riding into a 5 m/s head wind. The frontal area of the cyclist and bicycle

NikAS [45]

Answer:

87.1 mph

Explanation:

We are given that

Mass,m=60 kg

Power,P=340 W

Speed,v=5 m/s

Area, $A=0.344 m^2$

Drag coefficient, $C_d=0.88$

Coefficient of rolling resistance, $\mu_r=0.007$

Friction force, $f=\mu_rmg=0.007\times 60\times 9.8=4.1 N$

Where $g=9.8 m/s^2$

Let speed of cyclist=v'

Drag force, $F_d=\frac{1}{2}\rho_{air}AC_dv^2$

Density of air, $\rho_{air}=1.225 kg/m^3$

$F_d=\frac{1}{2}\times 1.225\times 0.344\times 0.88(5)^2=4.635N$

Power,P= $(F_d+f)\times v'$

$340=(4.1+4.635) v'=8.735v'$

$v'=\frac{340}{8.735}=38.9m/s$

$v'=87.1 mph$

1 m=0.00062137 miles

1 hour=3600 s

7 0

3 years ago

The fluid in a grdulated cylinder should be read at the _____ of the meniscus.

galina1969 [7]

<span>The fluid in a graduated cylinder should be read at the BOTTOM of the meniscus.</span>

5 0

4 years ago

Read 2 more answers

Explain why an aton is neutral

kodGreya [7K]

Atoms ere electrically neutral because they have equal number of protons and electrons. If an atom lose or gain one or more electrons it becomes an ion.

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3 years ago

Give an example of a situation in which you would describe an

Viktor [21]

It would be A because it would make sense

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3 years ago

How many electrons will constitute 2A current in unit time

soldi70 [24.7K]

Answer:

2 charges of electron (2C)

Explanation:

I = Q/t

2 = Q/1

Q = 2×1= 2C

Q = 2 charge of electron

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3 years ago