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
topjm [15]
3 years ago
8

Which determines the reactivity of an alkali metal? A. its boiling and melting points B. the shininess of its surface C. the num

ber of protons it has D. its ability to lose electrons
Physics
2 answers:
Naddik [55]3 years ago
7 0

Answer:

D

Ex plane

I just took the test

Gekata [30.6K]3 years ago
4 0

Answer:

D

Please let me know if this helped! Please rate it the brainlist if possible, thanks

You might be interested in
This chemical equation represents a ______________ reaction.
Ede4ka [16]

Answer:

you didnt put anything

Explanation:

7 0
3 years ago
Read 2 more answers
Consider two points in an electric field. The potential at point 1, V1, is 33 V. The potential at point 2, V2, is 175 V. An elec
Mnenie [13.5K]

Answer:

ΔU  = e(V₂ - V₁) and its value ΔU = -2.275 × 10⁻²¹ J

Explanation:

Since the electric potential at point 1 is V₁ = 33 V and the electric potential at point 2 is V₂ = 175 V, when the electron is accelerated from point 1 to point 2, there is a change in electric potential ΔV which is given by ΔV = V₂ - V₁.

Substituting the values of the variables into the equation, we have

ΔV = V₂ - V₁.

ΔV = 175 V - 33 V.

ΔV = 142 V

The change in electric potential energy ΔU = eΔV = e(V₂ - V₁) where e = electron charge = -1.602 × 10⁻¹⁹ C and ΔV = electric potential change from point 1 to point 2 = 142 V.

So, substituting the values of the variables into the equation, we have

ΔU = eΔV

ΔU = eΔV

ΔU = -1.602 × 10⁻¹⁹ C × 142 V

ΔU = -227.484 × 10⁻¹⁹ J

ΔU = -2.27484 × 10⁻²¹ J

ΔU ≅ -2.275 × 10⁻²¹ J

So, the required equation for the electric potential energy change is

ΔU  = e(V₂ - V₁) and its value ΔU = -2.275 × 10⁻²¹ J

5 0
3 years ago
Lauren throws her first pitch of the season for her school's softball team. If the ball travels 80 feet and takes 1.58 seconds t
kow [346]

Answer:

<em><u>5</u></em><em><u>0</u></em><em><u>.</u></em><em><u>6</u></em><em><u>3</u></em><em><u> </u></em><em><u>f</u></em><em><u>t</u></em><em><u>/</u></em><em><u>s</u></em><em><u> </u></em><em><u>(</u></em><em><u>2</u></em><em><u>d</u></em><em><u>p</u></em><em><u>)</u></em>

Explanation:

Speed = Distance/Time

80/1.58 = 50.63291139

= <u>50.63</u><u> </u><u>f</u><u>t</u><u>/</u><u>s</u> (2dp)

6 0
3 years ago
Someone help me please, I don't know how to do it :( ​
elena-14-01-66 [18.8K]

Answer:

fn /2 .3 'in

Explanation:

3 0
3 years ago
thuli wants to buy tv for R8500.a bank offers to loan her the money at an interest rate of 5%.she decides to pay the tv off in 3
gulaghasi [49]

Answer:

The total she has to pay is R8500 plus the 5% interest.

PLEASE ADD BRAINEEST

4 0
3 years ago
Other questions:
  • 26. The speed of light in a certain medium is
    10·1 answer
  • In atoms, electrons surround the nucleus in
    13·1 answer
  • What is difference between non uniform and uniform circular motion?
    10·1 answer
  • If a light bulb is missing or broken in a parallel circuit will the other bulb light?
    7·1 answer
  • Which of the following is true about a planet orbiting a star in the uniform circular motion? B. The speed of the plant is alway
    5·1 answer
  • A 0.20 mass on a horizontal spring is pulled back a certain distance and released. The maximum speed of the mass is measured to
    9·1 answer
  • Note: The rope is 20 m long. Answer like this: (1.<br> 2._____ etc)
    11·1 answer
  • Please answer 11-13. say if i'm right for 10 if you can.
    11·1 answer
  • Please fill the blank<br>its nonsense quiz​
    15·2 answers
  • The weight lifter used a force of 980 N to raise the barbell over her head in 5.21 seconds. Approximately how much work did she
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!