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
vova2212 [387]
3 years ago
8

A train is moving with a velocity of 70 km/h.

Physics
1 answer:
hodyreva [135]3 years ago
6 0

Answer:

B: It is moving north.

Explanation:

We are told that a train is moving with a velocity of 70 km/h.

Now, we are also told that the positive direction is north.

This means that the train is moving in the northern direction.

We can't say if it is speeding up or not because we are not given the acceleration.

Thus, option B is correct

You might be interested in
The chemical equation provided shows iron rusting to form iron oxide. Use the drop-down menu to choose the coefficients that wil
Brrunno [24]

Answer:

4 Fe + 3 O_2 \rightarrow 2 Fe_2 O_3

Explanation:

The original equation is:

Fe + O_2 \rightarrow Fe_2 O_3

We notice that:

- we have 1 atom of Fe on the left, and 2 atoms of Fe on the right

- we have 2 atoms of O on the left, and 3 atoms of O on the right

Therefore, the equation is not balanced.

In order to balance it, we can add:

- a coefficient 3 in front of O_2

- a coefficient 2 in front of Fe_2 O_3

So we have:

Fe + 3 O_2 \rightarrow 2Fe_2O_3

Now the oxygen is balanced, but the iron it not balanced yet, since we have 1 Fe on the left and 4 on the right. Therefore, we should add a coefficient 4 on the Fe on the left:

4 Fe + 3 O_2 \rightarrow 2 Fe_2 O_3

3 0
2 years ago
Read 2 more answers
Astronauts need special tools to work in space. One specially designed tool that astronauts use is a screwdriver. Using Newton’s
Softa [21]
Due to the fact that for every action there is an equal reaction for every turn on the screw the screw will exert energy equal to the amount you gave
3 0
3 years ago
Can anyone plz help me ​
Alekssandra [29.7K]

Answer:

1.) volume = 8 cm^3

2.) density = 2.6 g/cm^3

Explanation:

1.) volume =

side {}^{3}

=》

{2}^{3}

=》

8 \: cm {}^{3}

2.) density =

\frac{mass}{volume}

=》

\frac{20.8}{8}

=》

2.6 \: g \: cm {}^{ - 3}

density = 2.6

3 0
2 years ago
Show all your work clearly on the scratch paper) Two in-phase loudspeakers that emit sound with the same frequency are placed al
Darya [45]

Answer:

Explanation:

The speed of sound in air to be 343 m/s.

Given:

distance 'd' = 5 m

L = 12 m

It can be concluded that path difference must be equal to half of the wavelength when person is observing destructive interference'y' at 1 m distance from the equidistant position

Since

λ/2 = yd/L

λ/2 = (1 x 5)/12

λ = 0.833m

Frequency of the sound is given by,

f = v / λ => 343 / 0.833

f=411.6 Hz

8 0
3 years ago
What season is the Southern hemisphere in
Iteru [2.4K]

Answer:

hope this answer helps this is what I understand

3 0
2 years ago
Read 2 more answers
Other questions:
  • Write a hypothesis about the effect a change in temperature will have on the volume of a gas.
    14·2 answers
  • You are standing in front of a flat large mirror. As you step 1.0 m farther from the mirror, the distance between you and your i
    5·1 answer
  • Q3. A bridge is built without expansion gaps.
    8·1 answer
  • The following steps occur in rods when they are excited by photons of light. What is the proper sequence for these steps? 1. Mem
    6·1 answer
  • Which method determines the relative age of Earth's sedimentary layers based on their organization?
    12·1 answer
  • What is liquidity preferences?​
    13·2 answers
  • What are examples of convection currents?
    13·1 answer
  • Which of the following is not a part of the SMART acronym? Question 5 options: Specific Measurable Respectable Time-bound
    7·1 answer
  • What are the two groups of planets based on composition?
    7·1 answer
  • Rowenda is stopped on the side of the road. She then starts pedaling her bicycle for 15 seconds. Her final
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!