4 years ago

A wave with a frequency of 0.5 Hz and a speed of 10 m\s has a wavelength of..

Physics

1 answer:

aniked [119]4 years ago

3 0

Wavelength = (speed) divided by (frequency) = 10/0.5 = <span>20 </span>

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Which statement describes between a cup if cold water and a cup of boiling water

marishachu [46]

The thermal energy keeps these two changing their temperature over time.

The surrounding temperature (environment) clearly effects the cold water AND the boiling water.

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3 years ago

A 750 watt hairdryer is used for 60 seconds. how many joules of energy are used?

daser333 [38]

We know, Power = Energy / time
Here, P = 750 Watt
t = 60 sec

Substitute their values,
750 = E / 60
E = 750 * 60
E = 45,000 J

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Hope this helps!

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4 years ago

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A car tire has a pressure of 325 kPa when the temperature is 10 C. If the temperature of the tire rises to 50 C and its pressure

MAXImum [283]

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4 years ago

If the resistance through the fat is 3 times that through the muscle, how much of the total current goes through the fat in term

lapo4ka [179]

Answer:

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Explanation:

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2 years ago

Before 1960, people believed that the maximum attainable coefficient of static friction for an automobile tire on a roadway was

Eduardwww [97]

Answer:

4.18

Explanation:

Givens

The car's initial velocity $v_{i}$ = 0 and covering a distance Δx = 1/4 mi = 402.336 m in a time interval t = 4.43 s.

Knowns

We know that the maximum static friction force is given by:

$f_{s_max} =$ μ_s*n (1)

Where μ_s is the coefficient of static friction and n is the normal force.

Calculations

(a) First, we calculate the acceleration needed to achieve this goal by substituting the given values into a proper kinematic equation as follows:

Δx= $v_{i} +\frac{1}{2} at^2$

a=41 m/s

This is the acceleration provided by the engine. Applying Newton's second law on the car, so in equilibrium, when the car is about to move, we find that:

$f_{y}=n-mg=0\\ n=mg\\f_{x}=F-f_{s,max} =0\\ f_{s,max}=F=ma\\$

Substituting (3) into (1), we get:

$f_{s,max}=$ μ_s*m*g

Equating this equation with (4), we get:

ma= μ_s*m*g

μ_s=a/g

=4.18

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3 years ago