Ask question

Ask question

All categories

3 years ago

6

Two cars approach one another on opposing lanes of a highway. Car 1 is traveling north at a velocity of 80 km/h and car 2 is tra

veling south at a velocity of 140 km/h. What is the magnitude of the velocity of car 1 relative to car 2?

1 answer:

fomenos3 years ago

3 0

Answer:

220 km/hr

Explanation:

You might be interested in

A middle-aged man typically has poorer hearing than a middle-aged woman. In one case a woman can just begin to hear a musical to

Dmitriy789 [7]

Answer:

4

Explanation:

$I_0$ = Threshold intensity for woman

I = Intensity of sound for man

$\beta$ = Intensity level of sound = 6 dB

Intensity level of sound is given by

$\beta=10log\dfrac{I}{I_0}\\\Rightarrow 6=10log\dfrac{I}{I_0}\\\Rightarrow \dfrac{6}{10}=log\dfrac{I}{I_0}\\\Rightarrow 10^{\dfrac{6}{10}}=\dfrac{I}{I_0}\\\Rightarrow \dfrac{I}{I_0}=10^{\dfrac{6}{10}}\\\Rightarrow \dfrac{I}{I_0}=10^{0.6}\\\Rightarrow \dfrac{I}{I_0}=3.98\approx 4$

The ratio is 4

8 0

3 years ago

When drawing a free-body diagram for an object on an inclined surface, which way does the force of gravity point? A. Straight do

babunello [35]

A- Straight Down

Remember wherever the object is, whether it is straight or inclined, gravitational pull will always act downwards.

8 0

4 years ago

What type of change occurs when water change from a solid to a iquid?

Oksanka [162]

The type of change is melting

6 0

3 years ago

A clindrical rod of uniform density is located with its center at the origin, and its axis along the axis. It rotates about its

zhenek [66]

Answer:

6093.2328 J

Explanation:

For cylindrical rod moment of inertia will be

$I_X=I_Y=\frac{1}{12}m(3r^2+h^2)$

$I_X=I_Y=\frac{1}{12}\times 4(3\times 0.06^2+0.6^2)=0.1236$ $kg -m^2$

we have given time =0.02 sec

Angular speed = $\frac{2\pi }{T}=\frac{2\times 3.14}{0.02}=314\ rad/sec$

Rotational KE = $\frac{1}{2}I\omega ^2=\frac{1}{2}\times 0.1236\times 314^2=6093.2328\ J$

5 0

3 years ago

Evgen [1.6K]

Asexual reproduction is a type of reproduction that only requires one parent. The offspring only have the characteristics and traits from that parents. They create “clones” if you will. This is the most common form of reproduction for single cell organisms like prokarayotes and bacteria.

Here are the advantages:

1. Rapid Populating
Asexual reproduction gives the ability to produce large quantities of of offspring. This helps to fill up niche’s quickly and prevent intruders and competition from invading.

2. No Mates Required
Finding a mate can be very difficult for organisms that are in desolate environments, like the deep ocean. Asexual reproduction takes the need to find a mate away, allowing these organisms to multiply.

3. In Case of Emergency
In dire situations, plants and organisms can keep themselves alive and produce others to help them without the help of a mate, or other reproductive source. Plants are a great example of this. If no pollinator is available to pollinate, then they can clone by asexual reproduction.

4. No True Investment
Asexual reproducers do not have to carry their offspring for a long amount of time and produce more than one at a time. This makes it a quick and inexpensive process for them in the terms of time.

Here are the disadvantages:

1. No Diversity
Since the traits of only one parent is passed on, all of the offspring are exactly identical. This causes for a very big lack of diversity among the population of these organisms.

2. Prone To Extinction
All of the same traits also means all of the same weaknesses. Parasites and other predators that have evolved to kill just one of the organisms can take out the entire population.

3. Cannot Adapt
An organism has established reactions to certain things, and all of these reactions are passed down to their offspring with asexual reproduction. This makes it impossible for them to adapt to any environment changes.

6 0

3 years ago