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
Sonja [21]
3 years ago
7

A car moving with a velocity of 20 meters/second has

Physics
2 answers:
jolli1 [7]3 years ago
5 0
Kinetic energy is the product of mass and the square of the velocity of the moving object. In this case, we substitute the given data, that is 1.8 x10^5 joules = m * (20 m/s2)^2. Extracting the mass, the mass of the car therefore is equal to 450 kg
kramer3 years ago
4 0

Explanation :

Given that,

Velocity of the car, v = 20 m/s

Kinetic energy of the car, E_k=1.8\times 10^5\ J

Kinetic energy is given by :

E_k=\dfrac{1}{2}mv^2

m=\dfrac{2E_k}{v^2}

So, m=\dfrac{2\times 1.8\times 10^5\ J }{(20\ m/s)^2}

m = 900 kg

Hence, the mass of the car is 900 kg

You might be interested in
A loud sound is produced in the downtown section of a city. Which of the following is least likely to occur with the sound wave
JulsSmile [24]

Answer:

A. The sound wave will reflect off Buildings and automobiles.

Explanation:

This is because the sound waves would more likely propagate through diffraction through buildings and transmission through the air. It is also more likely to be absorbed by buildings than for multiple reflections to occur off buildings and automobiles. In the process of reflection, these materials would absorb the sound energy thereby reducing its ability to reflect.

6 0
3 years ago
Drag and drop each organic compound's role in nutrition next to the its name. Not all tile will be used.
iogann1982 [59]

Answer:

Carbs Provide Your Body With Energy

Proteins help your body build new cells, repair old cells, create hormones and enzymes, and keep your immune system healthy

Calcium is a mineral that people need to build and maintain strong bones and teeth. It is also very important for other physical functions, such as muscle control and blood circulation.

Stored body fat is called adipose tissue. Stored fat not only provides an energy reserve, but also cushions and protects internal organs. In addition, stored fat insulates the body and helps prevent heat loss in cold weather

Explanation:

3 0
3 years ago
What are two parts of an atom
seraphim [82]

Answer:

Nucleus And electron cloud

Explanation:

Hope this helps

7 0
3 years ago
Alex has to pick up a 20 N stack of documents and raise them 5 meters from the floor.
Serjik [45]

Answer:

1.Work done=100 joules

2.potential energy

3.kinetic energy

Explanation:

W=Force x distance

w= 20 N x 5 M

W = 100 JOULES

6 0
3 years ago
An object of mass m swings in a horizontal circle on a string of length L that tilts downward at angle θ. Find an expression for
VikaD [51]
We know that
g = LcosΘ 
<span>where g, L and Θ are centripetal gravity length, and angle of object
</span><span>ω² = g/LcosΘ </span>
<span>ω = √(g / LcosΘ) </span>
8 0
3 years ago
Read 2 more answers
Other questions:
  • The formula for calculating power is work divided by time (power = work ÷ time). What are two ways of stating the same relations
    8·2 answers
  • A wave with a frequency of 190 hz and a wavelength of 28.0 cm is traveling along a cord. the maximum speed of particles on the c
    9·1 answer
  • In the sum of 54.34 and 45.66, the number of significant figure for the<br>answer is​
    5·1 answer
  • Can someone help me with these questions plz
    6·1 answer
  • What was world war 2 about?
    14·1 answer
  • Determine the density of an object that has a mass of 149.8 g and displaces 12.1 mL of water when placed in a graduated cylinder
    13·1 answer
  • What is another word for a change in velocity/change in time
    9·2 answers
  • An object is NOT accelerating. Is its motion changing?<br> Yes or No?
    13·2 answers
  • An object accelerates 2 m/s2 when an unknown force of 20 N is applied to it. What was the mass of the object?
    5·1 answer
  • A glass optical fiber is used to transport a light ray across a long distance. The fiber has an index of refraction of 1.510 and
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!