All categories

3 years ago

Science Question

2 answers:

8 0

1 Is correct because James is going faster.
2 is correct because a faster speed on a position vs time graph will have a steeper slope
3 is correct as well.

The answer is 4 all of the above

Korvikt [17]3 years ago

6 0

Answer:

THE CORRECT ANSWERS ARE

AND

@WrappinUp

Explanation:

You might be interested in

HELP ASAP PLZZZZZZ

malfutka [58]

B because the electrons are moving to create a new form. Chemical energy is changing the form.

Hope this helps.

5 0

3 years ago

Diagnostic ultrasound of frequency 4.50 MHz is used to examine tumors in soft tissue. (a) What is the wavelength in air of such

mafiozo [28]

(a) $7.62 \times 10^{-5} m$ is the wavelength in air of such a sound wave.

(b) $3.33 \times 10^{-4}\ m$ is the wavelength of this wave in tissue.

<u>Explanation:</u>

Frequency and wavelength can be related by the equation,

Velocity = Wavelength x Frequency

$v=\lambda \times f$

where,

v - velocity of light for all EM (electromagnetic) waves in vacuum

Given:

f - 4.50 MHz = $4.50 \times 10^{6} \mathrm{Hz}$

a) To find the wavelength in air

We know,

Speed of sound in air = 343 m/s

Apply given frequency and speed of sound in air, we get

$\lambda=\frac{v}{f}=\frac{343}{4.5 \times 10^{6}}=76.2 \times 10^{-6}=7.62 \times 10^{-5}\ \mathrm{m}$

b) If the speed of sound in tissue is 1500 m/s, find the wavelength of this wave in tissue

Speed of sound in tissue, v = 1500 m/s

$\lambda=\frac{v}{f}=\frac{1500}{4.5 \times 10^{6}}=333.33 \times 10^{-6}=3.33 \times 10^{-4} \mathrm{m}$

4 0

3 years ago

A plane flies 890 miles at 76° north west what are its north and west components?

Pavlova-9 [17]

I think it’s 82747 on top of 827483

8 0

4 years ago

A thin rod of length 1.4 m and mass 180 g is suspended freely from one end. It is pulled to one side and then allowed to swing l

prisoha [69]

Answer:

$K.E = 0.1905 J$

Explanation:

From the question we are told that:

Length $L=1.4m$

Mass $m=180g$

Angular Velocity $\omega=1.80rads/s$

Generally the equation for Kinetic energy K.E is mathematically given by

$K.E =0.5 (1/3 ML^2 )w^2$

$K.E =0.5 ( 1/3 * 0.18 * 1.4^2 ) 1.8^2$

$K.E = 0.1905 J$

5 0

3 years ago

A garbage truck crashes head-on into a Volkswagen and the two come to rest in a cloud of flies. Which experiences the greater fo

Artist 52 [7]

The volkswagon experiences a greater force as it was hit by a larger object that had a larger mass than itself

8 0

3 years ago