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sveta [45]
3 years ago
10

Which best describes a force?

Physics
2 answers:
Tatiana [17]3 years ago
7 0

Answer:

a vector with magnitude and direction

sashaice [31]3 years ago
5 0
Force = mass*acceleration.

Therefore, a force has a magnitude and direction.
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Why is there a minimum mass for an object to become a star? smaller objects cannot be detected from earth. smaller objects canno
Julli [10]

Answer:

1. smaller objects cannot generate enough pressure to start hydrogen fusion.

2. 10,000,000

Explanation:

1. Stars are born in stellar nurseries known as nebula. A nebula is cloud of dust and gases. The disk of dust and gases when spins and gathers more and more mass, the temperature and pressure rises. If sufficient mass is gathered and right temperature and pressure is achieved fusion reaction starts and a star is born. Thus, smaller objects cannot generate enough pressure to start hydrogen fusion.

2.  the core of a star must reach a temperature of  <u>10,000,000</u>  degrees Celsius for hydrogen fusion to begin.

Hydrogen fusion reaction in sun is:

_1^1\textrm{H}+_1^1\textrm{H}\rightarrow 1^2\textrm{H}+_{+1}^0\textrm{e}+\text{energy}\\\\_1^2\textrm{H}+_1^1\textrm{H}\rightarrow 2^3\textrm{He}+\text{energy}\\\\_2^3\textrm{He}+_1^1\textrm{H}\rightarrow _2^4\textrm{He}+_{+1}^0\textrm{e}+\text{energy}

Overall reaction for the above series of reactions is given by:

4_1^1\textrm{H}\rightarrow _2^4\textrm{He}+2_{+1}^0\textrm{e}+\text{energy}

3 0
3 years ago
Read 2 more answers
Need help in the middle one
kondor19780726 [428]

Answer:

Guysi hate math answer this guy plsss ssss

7 0
3 years ago
An optical disk drive in your computer can spin a disk up to 10,000 rpm (about 1045 rad / s). if a particular disk is spun at 79
NeX [460]
(i) |α| = 235.6rad.s / 0.502s = 469 rad/s²
(ii) tang a = α*r = 469rad/s² * 0.12m / 2*11 = 2.56 m/s²
4 0
3 years ago
A curent-carrying 2.0-cm long segment of wire is inside a long solenoid adius - 40 cm - 800 turns/m, current - 50 mA). The wire
klasskru [66]

Answer:

The value is  F_{max}  = 12 \muN

Explanation:

From the question we are told that

   The  length is  l = 2.0 \  cm  =  0.02 \  m

     The radius of the the solenoid is r =40 \ cm

     The number of turns per meter is  N  =  800 \  turns / m

     The current through the solenoid  is  I  =  50 \  mA  =  50*10^{-3} \  A

      The  current through the segment is  I_s  =  12 \  A

   Generally the magnetic force is mathematically  represented as

    F  = B  *  I_s l sin(\theta)

At maximum \theta =  90^o

So  

   F_{max}  = B  *  I_s l

Here B is the magnetic field is mathematically represented as  

      B  =  \mu_o  * N  * I

Here  \mu_o is the permeability of free space with value

    \mu_o  =   4\pi * 10^{-7} N/A^2

So  

      B  =    4\pi * 10^{-7}  * 800  *50*10^{-3}

=>    B  =   5.0272 *10^{-5}   \  T

So

     F_{max}  =  5.0272 *10^{-5}  * 12 *  0.02

    F_{max}  = 1.2 *10^{-5}

      F_{max}  = 12 \muN

 

4 0
3 years ago
Organic compounds include
Norma-Jean [14]

Answer:

There are four main types or classes of organic compounds that are found in all living things. These are carbohydrates, lipids, proteins, and nucleic acids. ... All organic compounds contain carbon, usually bonded to hydrogen. Other elements may also be present.

Explanation:

5 0
3 years ago
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