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
Ganezh [65]
3 years ago
13

The train traveled 500 kilometers north to Odessa in 2 hours . What’s the train’s speed ? What is the velocity ?

Physics
1 answer:
ElenaW [278]3 years ago
7 0

Explanation:

Speed is distance over time.

500 km / 2 hr = 250 km/hr

Velocity is speed and direction.

250 km/hr north

You might be interested in
Q5: An ice skater moving at 12 m/s coasts
ExtremeBDS [4]

u = 0.077

Explanation:

Work done by friction is

Wf = ∆KE + ∆PE

-umgx = ∆KE,. ∆PE =0 (level ice surface)

-umgx = KEf - KEi = -(1/2)mv^2

Solving for u,

u = v^2/2gx

= (12 m/s)^2/2(9.8 m/s^2)(95 m)

= 0.077

8 0
2 years ago
Iron filings were mixed together with salt crystals. What unique property of iron would be BEST to separate the filings from the
Mashcka [7]
The melting point. So d is ur answer. The color and texture of both is the same. They sont have magnetism. So the only logical one is melting point.

Please vote brainliest
6 0
3 years ago
Read 2 more answers
A 4.3 kg steel ball and 6.5 m cord of negligible mass make up a simple pendulum that can pivot without friction about the point
Alekssandra [29.7K]

Answer

given,

mass of steel ball, M = 4.3 kg

length of the chord, L = 6.5 m

mass of the block, m = 4.3 Kg

coefficient of friction, μ = 0.9

acceleration due to gravity, g = 9.81 m/s²

here the potential energy of the bob is converted into kinetic energy

m g L = \dfrac{1}{2} mv^2

v= \sqrt{2gL}

v= \sqrt{2\times 9.8\times 6.5}

      v = 11.29 m/s

As the collision is elastic the velocity of the block is same as that of bob.

now,

work done by the friction force = kinetic energy of the block

f . d = \dfrac{1}{2} mv^2

\mu m g. d = \dfrac{1}{2} mv^2

d=\dfrac{v^2}{2\mu g}

d=\dfrac{11.29^2}{2\times 0.9 \times 9.8}

    d = 7.23 m

the distance traveled by the block will be equal to 7.23 m.

8 0
2 years ago
Take a close look at the energy transfers and transformations shown in the above diagram. Which type of energy is transformed in
Elanso [62]

Answer:

kinetic energy

Explanation:

a certain amount of energy is transferred by the kick. The ball gains an equal amount of energy, mostly in the form of kinetic energy.

4 0
2 years ago
Read 2 more answers
What happens to matter during chemical changes?
Harrizon [31]
The object that goes through chemical change, changes completely to where you can not change it back to its original form. Physical change you can undo
7 0
2 years ago
Other questions:
  • LOOK AT THE PICTURE!! 3 <br> Please answer properly
    9·2 answers
  • What did the diver most likely use as a reference point to describe the position of the squid?
    12·1 answer
  • Kelly carried a box weighing 10 N the 200 meters from his car to his new house.  George took the box from Kelly and carried it u
    5·2 answers
  • Which material would be best for thawing frozen food quickly? O A. A plastic plate O B. A steel plate O C. A glass plate O D. A
    8·1 answer
  • What is the formula for speed or velocity?
    15·1 answer
  • Question 3 (1 point)
    15·1 answer
  • 1.) True or False. Scientists have drilled through the crust to reach the mantle.
    10·2 answers
  • 3. A rescue plane drops a package to a stranded party of explorers. The plane is traveling horizontally at a velocity of
    14·1 answer
  • Please Help me to find the answer...​
    8·1 answer
  • An electric heater carries a current of 13.5 A when operating at a voltage of 120V . What is the resistance of the heater?
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!