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
Dafna1 [17]
3 years ago
13

39. A dog runs on a waxed floor at an initial speed of 2 m/s. It slides to a stop with an

Physics
1 answer:
Sedbober [7]3 years ago
5 0

Answer:

Explanation:

Use the one-dimensional equation

v_f=v_0+at where vf is the final velocity of the dog, v0 is the initial velocity of the dog, a is the acceleration of the dog, and t is the time it takesto reach that final velocity. For us:

0 = 2 + -.43t and

-2 = -.43t so

t = 4.7 seconds

You might be interested in
A roller coaster is released from the top of a track that is 57 m high. Find the roller coaster speed when it reaches ground lev
Art [367]

Hi there!

Assuming the track is frictionless:

E_i = E_f\\\\PE = KE\\\\mgh = \frac{1}{2}mv^2

Cancel out the masses and rearrange to solve for velocity:

gh = \frac{1}{2}v^{2}\\\\v = \sqrt{2gh}\\\\

Plug in the given height and let g = 9.8 m/s²:

v = \sqrt{2(9.8)(57)} = \boxed{33.42 m/s}

7 0
2 years ago
What object best represents a true scale model of the shape of earth?
BabaBlast [244]
Any object that is spherical in shape would best represent a true scale model of the shape of the Earth. Examples are ping pong balls, billiard balls, marble and other smooth spherical objects. The shape of the Earth is called the oblate spheroid. The "oblate" would refer to an oblong shape and "spheroid" would refer to an almost spherical shape. The earth has on almost spherical shape and has a slightly oblong appearance. The diameter from the South pole to the north pole was measured to have a value of 12714 km while the diameter of the equator is approximately 12756 km. As you can see, the values are not equal. This makes the earth not a perfect sphere.
6 0
3 years ago
Which statement is true for both types of transistors?
lara31 [8.8K]

For both NPN and PNP this is true:

The base is between the collector and the emitter.

8 0
3 years ago
Read 2 more answers
What two characteristics do electromagnetic waves vary in?
rosijanka [135]
They size of the wave and the time of a certain wave.
4 0
3 years ago
Read 2 more answers
Please help,,, question on image
MA_775_DIABLO [31]

Answer:

first you have to

Explanation:

3 0
3 years ago
Other questions:
  • The phospholipid molecule has two parts, the polar end and the bipolar end.<br> True or false
    14·1 answer
  • In an experiment researchers want to determine if the _____ Variable causes change in _____ variable
    8·2 answers
  • A student sits atop a platform a distance h above the ground. He throws a pingpong ball horizontally with a speed v. However, a
    15·1 answer
  • which of the following describes how the Earth's magnetic pole is related to its geographical poles? A. the magnetic poles and g
    12·1 answer
  • What number should be substituted for the question mark to balance the equation and why is that the correct number?
    5·2 answers
  • HURRY ! THE BEST I WILL GIVE THE BRAINLIEST​
    8·1 answer
  • A 1.8 kg book had been dropped from the top of the football stadium. It's speed is 4.8 m/s when it is 2.9 meters above the groun
    8·1 answer
  • What is the formula for finding the velocity?
    15·2 answers
  • When both distance and direction are indicated, it becomes a
    15·1 answer
  • What is the potential difference across lamp 1
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!