1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Artyom0805 [142]
3 years ago
9

CN you help me with this question?

Physics
1 answer:
nata0808 [166]3 years ago
5 0
That period of time is called the "half-life" of that particular isotope,
because that's how long it takes for ONE-HALF of it to decay and
turn into some other substance.

So, however much you start out with, you can expect that after one
half-life of time has passed, half of the total amount (50%) has decayed
and turned into other substances, and the other half (50%) remains.
You might be interested in
If the bat emits a sound at a frequency of 80.2 kHzkHz and hears it reflected at a frequency of 83.5 kHzkHz while traveling at a
solong [7]

To solve this problem we will apply the concepts related to the Doppler Effect. The Doppler effect is the change in the perceived frequency of any wave movement when the emitter, or focus of waves, and the receiver, or observer, move relative to each other.

Mathematically it can be described as

v' = v (\frac{f' ( v - v_{bat}) - f ( v + v_{bat})}{f'(v-v_{bat}) + f ( v + v_{bat})})

Where,

v = Speed of sound

f' = Reflected frequency

f = Emitted Frequency

v_{bat} = Speed of the object

Assuming that the speed of the medium is the speed of sound of 343m / s, we will then have that:

v' = 343 (\frac{(83.5) (343 -3.9) - 80.2(343+3.9)}{83.5(343-3.9) + 80.2(343+4.3)})

v' = 3.0134m/s

8 0
3 years ago
A train car has a mass of 10,000 kg and is moving at +3.0 m/s. It strikes an identical train car that is at rest. The train cars
jolli1 [7]

Answer:1.5

Explanation:

Edg

7 0
3 years ago
A constant force of 45 N directed at angle θ to the horizontal pulls a crate of weight 100 N from one end of a room to another a
Rasek [7]

Answer:

W=173.48J

Explanation:

information we know:

Total force: F=45N

Weight: w=100N

distance: 4m

vertical component of the force: F_{y}=12N

-------------

In this case we need the formulas to calculate the components of the force (because to calculate the work we need the horizontal component of the force).

horizontal component: F_{x}=Fcos\theta

vertical component: F_{y}=Fsen\theta

but from the given information we know that F_{y}=12N

so, equation these two F_{y}=Fsen\theta and F_{y}=12N

Fsen\theta =12N

and we know the force F=45N, thus:

45sen\theta=12

now we clear for \theta

sen\theta =12/45\\\theta=sin^{-1}(12/45)\\\theta =15.466

the angle to the horizontal is 15.466°, with this information we can calculate the horizontal component of the force:

F_{x}=Fcos\theta

F_{x}=45cos(15.466)\\F_{x}=43.37N

whith this horizontal component we calculate the work to move the crate a distance of 4 m:

W=F_{x}*D\\W=(43.37N)(4m)\\W=173.48J

the work done is W=173.48J

7 0
3 years ago
An igneous rock becomes buried, is subject to high heat and pressure, and recrystallizes. This rock then is eroded, transported,
nevsk [136]

Answer:

Answered

Explanation:

When an igneous rock becomes buried, is subjected to high heat and pressure, and recrystallizes it is formed into  Metamorphic rock. Now this rock is eroded, transported, deposited and subsequently lithified to be converted into Sedimentary rock.

The same igneous rock is first converted into Metamorphic and then into sedimentary by the process of weathering.

5 0
3 years ago
Please help! What are 3 things that make Longitudinal and Transverse waves the same?
Flura [38]
"<span>All waves have frequency, wavelength, speed and amplitude." </span>
4 0
3 years ago
Other questions:
  • A skateboarder starts at 2.75 m/s and accelerates for 8.90 s over a distance of 16.7
    5·1 answer
  • Please answer as soon as possible. <br><br> A Physics question about electricity and circuits.
    6·1 answer
  • What type of energy does a battery have?
    9·2 answers
  • If continuous spectrum light from a star passes through a cool, low-density gas on its way to your telescope and spectroscope, _
    11·1 answer
  • Help! pls, look at the attachment
    13·1 answer
  • In a Joule experiment, a mass of 6.51 kg falls through a height of 66.8 m and rotates a paddle wheel that stirs 0.68 kg of water
    12·1 answer
  • Why is the unit of temperature is called derived unit<br><br>​
    14·1 answer
  • Anybody know the answer?
    15·1 answer
  • Joe loves joe so yes​
    12·2 answers
  • A solid sphere rolls along a horizontal, smooth surface at a constant linear speed without slipping. What is the ratio between t
    10·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!