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
Mashcka [7]
3 years ago
9

Which technological advancement made the Pony Express unnecessary?

Physics
2 answers:
Vikki [24]3 years ago
7 0
Telegraph! Because telegraphs were used to communicate and to (at that time) send messages rapidly.
Sergeu [11.5K]3 years ago
6 0
The answer is Telegraph
You might be interested in
The plates of a parallel-plate capacitor are oppositely charged and attract each other. Find the expression for the force one pl
Mamont248 [21]

The force exerted by one plate for two parallel plates arrangement is F = QE/2.

<h3>Force one plate exerts on the other</h3>

The force exerted by one plate for two parallel plates arrangement is given as follows;

F = QE/2

where;

  • Q is the charge on one plates
  • E is the electric field due to the charge
  • F is force exerted by one plate

Thus, the force exerted by one plate for two parallel plates arrangement is F = QE/2.

Learn more about force between parallel plates here: brainly.com/question/13590045

5 0
2 years ago
It takes 40 J of energy to push a large box 4m across a floor. Assuming the push is the same direction as the movement, what is
Jobisdone [24]

Answer:

10 N

Explanation:

Work done is the dot product of the force magnitude with distance and cosine of the angle betweenthem.

Equation to use: W=|F|*|d|*cosθ

Your unknown is the force F; You have one equation, oneunknown.

40j=(F)*(4m)*cos(0)

F=40j/4m

F=10N

3 0
3 years ago
Read 2 more answers
Fission fusion worksheet answers
fredd [130]
Http://tomschoderbekchem.blogspot.com/2014/09/nuclear-fission-and-fusion-worksheet.html

5 0
4 years ago
Phil is riding a scooter and pushes off the ground with his foot. this causes him to accelerate at 12 m /s. Phil weighs 600 N. h
Dvinal [7]

Answer:

734.16 kg m/s^{2}

Explanation:

The problem is asking for the Force of pushing off the ground.

  • The formula of Force is: F = mass x acceleration

Given = <em>Mass</em>: 600 newtons (N)

             <em>Acceleration</em>: 12 m/s^{2}

We have to convert the mass into kg first. Remember that <u>1 kg is equal to 9.80665 newtons.</u>

Let x be the<em> mass in newtons</em>.

Let's convert: \frac{1 kg}{9.80665 N} x \frac{x}{600 N} = \frac{600}{9.80665} = 61.18 kg

Phil's weight is 61.18 kg

Let's go back to finding the force.

F = m x a

F = 61.18 kg x 12 m/s^{2}

F = 734.16 kg m/s^{2}

7 0
3 years ago
A student is studying the fossils of a plant species that lived several million years ago. The fossils of this species are found
tresset_1 [31]

B. Australia and Antarctica were a single landmass in the past.

Explanation:

The most likely explanation for why the fossils of this plant are found on these two continents is that Australia and Antarctica were a single landmass in the past.

This evidence is vastly supported by the theory of plate tectonics originally, the theory of continental drift.

  • Plate tectonics proposes that all land masses were once joined together as a single supercontinent called Pangaea.
  • The region of Antartica and Australia were once joined as a single continental mass.
  • The plant must have developed together at that time.
  • When the continents moved apart, they still had the fossils.

learn more:

Continental drift brainly.com/question/5002949

#learnwithBrainly

6 0
4 years ago
Other questions:
  • Samuel tripped while playing basketball and skinned his knee on the concrete. Many of the skin cells on that knee were killed or
    14·1 answer
  • Complete the following sentences. a. The motion of the particles is a model of__________. . b. The movement of particles from on
    12·1 answer
  • Which letter represents the direction of the centripetal force?
    13·1 answer
  • A mass m = 0.7 kg is released from rest at the origin 0. The mass falls under the influence of gravity. When the mass reaches po
    5·1 answer
  • A car drives around racetrack for 30 seconds. What do you need to know to calculate the average velocity of the car
    11·2 answers
  • If the switch for the light bulb is in the on position, which of the following would be true about the circuit below? a. it is a
    11·1 answer
  • The actual speed of the car at the top of the hill is 20.0m/s. What is the reason for this difference in velocity?
    11·1 answer
  • A certain car can accelerate from 0 to 100 km/hr in 6.0 seconds what is the average acceleration of the car in m/s^2
    11·1 answer
  • Which quantity is a vector quantity?
    10·1 answer
  • A toy car is moving along with 0. 50 joules of kinetic energy. If its speed is doubled, then its new kinetic energy is.
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!