All categories

3 years ago

Joe lives 100 miles away from Bill . What is Joes average speed if he reaches Bills home in50's?

1 answer:

5 0

Average speed= total distance divided by total time.
So our total distance here is 100miles.
And our total time is 50seconds
Average speed = 100/50
Average speed = 2 miles per second

You might be interested in

Two boxes are connected to each other as shown. The system is released from rest and the 1.00-kg box falls through a distance of

disa [49]

Answer:

The kinetic energy of box b is 2.44 J.

Explanation:

Given that,

Mass of box a =3.00 kg

Mass of box b=1.00 kg

Distance = 1.00 m

We need to calculate the acceleration of the system

Using formula of acceleration

$a=\dfrac{m_{2}\times g}{m_{1}+m_{2}}$

put the value into the formula

$a=\dfrac{1.00\times9.8}{1.00+3.00}$

$a=2.45\ m/s^2$

We need to calculate the velocity

Using equation of motion

$v^2=u^2+2as$

Put the value into the formula

$v^2=0+2\times2.45\times1.00$

$v=\sqrt{2\times2.45\times1.00}$

$v=2.21\ m/s$

We need to calculate the kinetic energy of box b

Using formula of energy

$K.E=\dfrac{1}{2}mv^2$

Put the value into the formula

$K.E=\dfrac{1}{2}\times1.00\times(2.21)^2$

$K.E=2.44\ J$

Hence, The kinetic energy of box b is 2.44 J.

3 0

4 years ago

Sound can travel through a medium, but it does not require a medium. <br> a. True<br> b. False

pishuonlain [190]

The statement is false. Sound REQUIRES a material medium
in order to propagate from one place to another..

6 0

4 years ago

What is the measured value always positive from one point to another

LekaFEV [45]

It is called "distance". In fact, distance measures how far apart two points are from each other, and it is always a positive number.
In mathematics, for instance, the distance between two points of coordinates (x1,y1) and (x2,y2) on a xy-plane is defined as
$d= \sqrt{(x_1-x_2)^2 + (y_1-y_2)^2}$
and by definition, this number is always positive.

4 0

3 years ago

The range of audible frequencies is from about 20.0 hz to 2.00×104 hz . what is range of the wavelengths of audible sound in air

TiliK225 [7]

The wavelength is related to the frequency by the relationship:
$\lambda= \frac{v}{f}$
where v is the wave speed and f is its frequency.

The speed of sound in air is v=344 m/s. The lowest frequency is f=20.0 Hz, so the corresponding wavelength is
$\lambda_1 = \frac{v}{f_1}= \frac{344 m/s}{20.0 Hz}=17.2 m$
The highest frequency is $f_2 = 2.00 \cdot 10^4 Hz$ , so the corresponding wavelength is
$\lambda_2 = \frac{v}{f_2}= \frac{344 m/s}{2.00 \cdot 10^4 Hz}=0.017 m$

Therefore, the range of wavelengths of audible sound in air is
[0.017 m - 17.2 m]

4 0

3 years ago

What color of light in the visible spectrum appears brightest?

VLD [36.1K]

The color green is the the color of light in the visible spectrum which appears the brightest, but with proper illumination, the color green-yellow appears to be the brightest, with the human eye having the maximum sensitivity of 555nn

4 0

3 years ago