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
Sidana [21]
4 years ago
15

30 Points 4 correct answer!!! ^u^

Physics
2 answers:
sladkih [1.3K]4 years ago
8 0
A is the answer because lithium has an atomic number of 3<span />
lakkis [162]4 years ago
3 0
Lithium has an atomic number of 3 so right away all the answer choices are eliminated except A., and oxygen does have 8 neutrons, boron 5 electrons, and neon a mass of 20
You might be interested in
How long will it take an object to move 100 meters if the object is traveling with and average speed of 0.5 meters per second
gogolik [260]
100\0.5 = 200 seconds
4 0
3 years ago
If railroad tracks were built over the boundary of two plates what would happen to the railroad tracks as the plates moved
Oliga [24]
The railroad tracks will move with the plate boundaries
6 0
4 years ago
An electric car uses a 45-kW (160-hp) motor. If the battery pack is designed for 340V, what current would the motor need to draw
alukav5142 [94]

Answer:

Current = 132.35 A

The motor needs to draw 132.35 Amperes current from the battery.

Explanation:

The formula of electric power is given as follows:

Power = (Voltage)(Current)

Current = Power/Voltage

In this question, we have:

Power = 45 KW = 45000 W

Voltage of Battery Pack = 340 V

Current needed to be drawn = ?

Therefore,

Current = 45000 W/340 V

<u>Current = 132.35 A</u>

<u>The motor needs to draw 132.35 Amperes current from the battery.</u>

5 0
3 years ago
Prove the correctness of this equation s=vt + 1/2at ​
Kaylis [27]

Answer:

The formula is dimensionally correct.

Explanation:

Given

s = ut + \frac{1}{2}at^2

Required

Prove its correctness

Write out the dimension of each:

s = M^0LT^0 --- displacement

ut = M^0LT^{-1} *  T --- velocity * time

\frac{1}{2}at^2 = M^0LT^{-2} * T^2 --- acceleration * square of time

The expression becomes:

s = ut + \frac{1}{2}at^2

M^0LT^0 = M^0LT^{-1} *  T + M^0LT^{-2} * T^2

Apply law of indices

M^0LT^0 = M^0LT^{-1+1} + M^0LT^{-2+2}

M^0LT^0 = M^0LT^{0} + M^0LT^{0}

M^0LT^0 = M^0LT^{0}

Both sides of the equation are equal

5 0
3 years ago
The class found many nonliving things in the sample of pond water. Which of these is a way that the students can tell the differ
deff fn [24]
Living things are made up of cells while non living things are not
7 0
3 years ago
Read 2 more answers
Other questions:
  • A magnetic field of 37.2 t has been achieved at the mit francis bitter national magnetic laboratory. Find the current needed to
    7·1 answer
  • Which describes an object’s velocity that changes by the same amount each second?
    12·2 answers
  • Why do plants need to obtain carbon atoms?
    12·1 answer
  • What is the difference between: first moment of area and second moment of area?
    7·1 answer
  • Which of the following processes charges an object by friction
    12·2 answers
  • Which geologic events occur most often at this mid-oceanic ridge plate
    8·1 answer
  • The law of conservation of momentum states that...
    15·1 answer
  • Calculate the volume of an object of mass 500g whose density is 70kgm-3 <br><br>​
    8·1 answer
  • 5.1 What is the nucleus composed of ?
    14·1 answer
  • A plane flies with an average
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!