4 years ago

Scientists who study races and their origins are called

Physics

2 answers:

trapecia [35]4 years ago

6 0

The answer is B. Bye because B those study speed.

Nikolay [14]4 years ago

4 0

the answer is C in USA test prep

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Choose the best scientific reasoning for how objects with different amounts of mass can influence the rate at which they slow do

aev [14]

Answer:

The heavier something is, the harder it is to slow down. As such, higher amounts of mass result in a lower rate of slowing.

6 0

3 years ago

A skydiver deploys his parachute when he is 1000m directly above his desired landing spot. He then falls through the air at a st

insens350 [35]

We can calculate his resultant speed.

Resultant speed is:
v^2 = 5^2 + 1,9^2
v = 5,349 m/s

Now we need to find angle between resultant speed and vertical speed.
cos(alpha) = 5/5.349 = 0.9347
alpha = 20,8 degrees

Answer is 20,8 degrees

8 0

4 years ago

A car which is traveling at a velocity of 15 m/s undergoes an acceleration of 6.5 m/s2 over a distance of 340 m. How fast is it

fomenos

Answer:68.15m/s

Explanation:

<u><em>Given: </em></u>

v₁=15m/s

a=6.5m/s²

v₁=?

x=340m

<u><em>Formula:</em></u>

v₁²=v₁²+2a (x)

<u>Set up:</u>

= $\sqrt{15m/s} ^{2} +2(6.5m/s^2)(340m)$

<h2><u><em>Solution:</em></u></h2><h2><u><em>68.15m/s</em></u></h2>

<u />

6 0

3 years ago

What is the wavelength of a radiowave that has a frequency of 9.650 x10^7 Hz (cycles per second)?h = 6.6261 x10^-34 J/sc = 2.998

slava [35]

Hello!!

For this, we only need frequency and speed, so for calculate we applicate formula:

$\boxed{\lambda = V/f}$

$\textbf{Being:}$

$\sqrt{}$ $\lambda = Wavelength = \ ?$

$\sqrt{}$ $V = Velocity = 2.998*10^{8} \ m/s$

$\sqrt{}$ $f = Frequency = 9,650*10^{7} \ Hz$

$\text{Then let's \textbf{replace it according} we information:}$

$\lambda = 2,998*10^{8} \ m /s / 9,650*10^{7} \ Hz$

$\lambda = 3.106 \ m$

$\textbf{Result:}\\\text{The wavelength of the radiowave is \textbf{3.106 meters}}$

4 0

3 years ago

The road from city A to city B is described by a car with Vm 40 km / h. When the car turns (from B to A) the average speed is 60

True [87]

Answer:

i think the answer is 20.......

7 0

2 years ago