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
Nataly_w [17]
3 years ago
15

Money is useful to people because it is __________.Select one of the options below as your answer:

Physics
2 answers:
hram777 [196]3 years ago
4 0
A. A medium of exchange .... Hope am right !!!
igomit [66]3 years ago
3 0
The answer is A because money is a form of barter in a sense.
You might be interested in
A refrigerator having a power rating of 350W operates for 12 hours a day. calculate the cost of electrical energy to operate it
rodikova [14]

Answer:

See the answers below.

Explanation:

The cost of energy can be calculated by multiplying each given value, a dimensional analysis must be taken into account in order to calculate the total value of the cost in Rs.

Cost=0.350[kW]*12[\frac{hr}{1day}]*30[days]*4.5[\frac{Rs}{kW*hr} ]=567[Rs]

The fuse can be calculated by knowing the amperage.

P=V*I

where:

P = power = 350 [W]

V = voltage = 240 [V]

I = amperage [amp]

Now clearing I from the equation above:

I=P/V\\I=350/240\\I=1.458[amp]

The fuse should be larger than the current of the circuit, i.e. about 2 [amp]

3 0
2 years ago
Could friction
ziro4ka [17]

Answer:

Friction:  is used to hang an object on the wall

  Force: is what will determine if the object stays in place or not  

Explanation:

5 0
3 years ago
The current supplied by a battery as a function of time is ) -(0.64 A)e-/(6.0 hr). What is the total number of electrons transpo
Paha777 [63]

Answer:

The total number of electrons is 8.6\times10^{22}

(3) is correct option.

Explanation:

Given that,

The current equation is

I=0.64 e^{\dfrac{-t}{6.0 hr}}

We know that,

The formula of charge

q=\int_{0}^{\infty}{I dt}

q=\int_{0}^{\infty}{0.64 e^{\dfrac{-t}{6.0 hr}}dt

q=0.64\int_{0}^{\infty}{e^{\dfrac{-t}{6.0 hr}}dt

q=0.64\int_{0}^{\infty}{e^{\dfrac{-t}{21600}}dt

q=0.64(21600e^{\dfrac{-t}{21600}})_{0}^{\infty}

q=0.64(0-21600)

q=0.64\times21600

q=13824\ C

We need to calculate the number of electron

Using formula of charge

q=ne

n=\dfrac{q}{e}

n=\dfrac{13824}{1.6\times10^{-19}}

n=8.6\times10^{22}

Hence, The total number of electrons is 8.6\times10^{22}

7 0
3 years ago
What causes interstellar dust and gas to start to contract and form a protostar?
oee [108]
I’m pretty sure the answer is 3
6 0
2 years ago
Read 2 more answers
1. Should water be classified as renewable or nonrenewable? Explain your reasoning.
Alinara [238K]

Answer:

Renewable Resource Hydropower is renewed by the Earth's hydrologic cycle. Water has also been considered renewable, but overpumping of groundwater is depleting aquifers, and pollution threatens the use of many water resources, showing that the consequences of resource use are not always simple depletion.For low-mass stars (left hand side), after the helium has fused into carbon, the core collapses again. As the core collapses, the outer layers of the star are expelled. A planetary nebula is formed by the outer layers. The core remains as a white dwarf and eventually cools to become a black dwarf. inexpensive compared to coal ... o Two types of coal—low rank (pollutes more), and high rank.

Explanation:

4 0
2 years ago
Other questions:
  • The force between two magnetic poles will increase as their separation is increased. true or false?
    7·1 answer
  • The work done to lift a 10kg object to a height of 1m above the ground is
    8·1 answer
  • What must be the distance in meters between point charge q1 = 30.3 µC and point charge q2 = -68.2 µC for the electrostatic force
    7·1 answer
  • Why do quarterbacks throw the football with significant spin about its long axis?
    6·1 answer
  • What is modulus of elasticity for shearing stress and strain called?
    13·1 answer
  • A diver wants to jump from a board, the initial height is 10 meters and he wants to reach a horizontal distance of 2 meters. Wha
    5·1 answer
  • Please help!!30 points and will give the brainliest answer for a clear explanation.I need it really fast. Thank you!
    11·1 answer
  • A man does 4,780 J of work in the process of pushing his 2.70 103 kg truck from rest to a speed of v, over a distance of 25.5 m.
    7·1 answer
  • What is the difference between an open and closed circuit?
    5·2 answers
  • Substances which naturally attract each other called what
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!