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3 years ago

13

What is the momentum of an airplane with a mass of 360,000 kg moving down the runway at 1.5 m/s?

1 answer:

Ymorist [56]3 years ago

5 0

Momentum is mass times velocity
360000 * 1.5 =540,000kg m/s

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If the mass of an object is 5 kg and the velocity is 8 m/s, what is the momentum?

topjm [15]

Answer:

40 kg•m/s

Explanation:

momentum (p) = mass (kg) × velocity (m/s)

3 0

3 years ago

When a wire is made smaller, the resistance increases. Which happens to the electric current?

Free_Kalibri [48]

Well, you can pretty much see it with this formula :

I = V/R

If the resistance (R) is increased, the amount of I will be increased.

so the answer would be : A. The current decreases

hope this helps

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4 years ago

Read 2 more answers

In August 2011, the Juno spacecraft was launched from Earth with the mission of orbiting Jupiter in 2016. The closest distance b

Vikentia [17]

(a) 8927 mi/h

In order to calculate the average speed, we need to convert the time (t=5.0 y) into hours first. In 1 year, we have 365 days, each day consisting of 24 hours, so the time taken is:

$t=(5.0 y)(365 d/y)(24 h/d)=43,800 h$

The distance covered by the spacecraft is

$d=391 mil. mi = 391\cdot 10^6 mi$

Therefore, the average speed is just the ratio between the distance covered and the time taken:

$v=\frac{d}{t}=\frac{391\cdot 10^6 mi}{43,800 h}=8,927 mi/h$

(b) 35 minutes (2097 seconds)

The transmitted signals (which is a radio wave, which is an electromagnetic wave) travels back to the Earth at the speed of light:

$c=3.0\cdot 10^8 m/s$

Since 1 miles = 1609 metres, the distance covered by the signal is

$d=391\cdot 10^6 mi \cdot (1609 m/mi)=6.29\cdot 10^{11} m$

So, the time taken by the signal will be

$t=\frac{d}{v}=\frac{6.29\cdot 10^{11} m}{3.0\cdot 10^8 m/s}=2097 s$

And since 1 minute = 60 sec, the time taken is

$t=2097 s \cdot \frac{1}{60 s/min}\sim 35 min$

7 0

3 years ago

If an object looks blue, it reflects ____ waves. Question 4 options: blue red and yellow all but blue all

Masteriza [31]

Answer:

Blue

Explanation:

Because, That object absorbs all colours light waves but des not absorbs Blue. So The blue light is reflected because it is not absorbed

4 0

2 years ago

A) A 5.75 mL sample of mercury has a measured mass of 77.05 g. The density is ___________.

Kitty [74]

Answer:

Density of the sample will be 13.4 kg/L

Explanation:

We have given volume of the sample $V=5.75mL=5.75\times 10^{-3}L$

Mass of the sample $M=77.05gram =77.05\times 10^{-3}kg$

We have to find the density of the sample

Density of the sample is given by

$Density=\frac{mass}{volume}=\frac{77.05\times 10^{-3}}{5.75\times 10^{-3}}=13.4kg/L$

So density of the sample will be 13.4 kg/L

4 0

4 years ago