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
inessss [21]
3 years ago
15

The drag coefficient of a car at the design conditions of 1 atm, 25°c, and 90 km/h is to be determined experimentally in a large

wind tunnel in a full-scale test. the height and width of the car are 1.25 m and 1.65 m, respectively. if the horizontal force acting on the car is measured to be 230 n, determine the total drag coefficient of this car. take the density of air at 1 atm and 25°c as ρ = 1.164 kg/m3. (round the final answer to two decimal places.)
Physics
1 answer:
Anvisha [2.4K]3 years ago
8 0
Velocity = 90 km/h = 25 m/s

Drag coefficient, Cd = 2D/Density of air*Frontal area*sqr. velocity

Substituting,

Cd = (2*230)/(1.164*1.25*1.65*25^2) = 0.3066
You might be interested in
Find the mass. 10 points. Will give brainliest.
TiliK225 [7]

Answer:

<h2>3.94 kg</h2>

Explanation:

Given,

Force ( f ) = 30 N

Acceleration(a) = 7.6 m/s

Now, Let's find the mass of the ball

Using the Newton's second law of motion:

We get:

force \:  = mass \:  \times acceleration

plug the value

30 \:  = m \:  \times 7.6

Use the commutative property to reorder the terms

30 = 7.6 \: m

Swap the sides of the equation

7.6m = 30

Divide both sides of the equation by 7.6

\frac{7.6 \: m}{7.6}  =  \frac{30}{7.6}

Calculate

m = 3.94 \: kg

Hope this helps..

Best regards!!

7 0
3 years ago
Read 2 more answers
consider the free-body diagram. if you want the box to move, the force applied while dragging must be greater than the
NeTakaya

Answer:

Force of static friction between the two surfaces

Explanation:

When two surfaces come into contact, they exert a force that resist the sliding of the two surfaces. This force is called static friction.

This force is given by the relation

                                       F_{s}=\mu_{s}\eta

Where,

                             μ - coefficient of static friction

                             η - normal force acting on the body

When a force acts on a body placed on a rough surface, it doesn't do any work if the applied force was less than the force of static friction.

So, in order to move the body, the applied force should be greater than the force of static friction.

6 0
3 years ago
A centrifuge is a device that rotates an object to produce an acceleration many times that of gravity Pilots are trained in such
Leviafan [203]

Answer:

ω = 0.571 rad/s

Explanation:

given data

radius = 30 m

solution

we take here g = 9.8 m/s²

and g is express as

g = r × ω²     ....................1

put here value and we get

9.8 = 30 × ω²

solve it we get

ω = 0.571 rad/s

5 0
3 years ago
A wire of Nichrome (a nickel-chromium-iron alloy commonly used in heating elements) is 1.3 m long and 1.6 mm2 in cross-sectional
fredd [130]

Answer: 1.3 *10^6 Ω*m

Explanation: In order to explain this problem we have to use the following expression for the resistence:

R=L/(σ*A) where L and A are the length and teh area for the wire, respectively. σ is the conductivity of teh Nichrome.

Then, from mteh OHM law we have V=R*I so R=V/I=2/3.2=0.625 Ω

Finally we have:

σ=L/(R*A)=1.3/(0.625*1.6*10^-6)=1.3*10^6 Ω*m

5 0
3 years ago
1. A car travels at 55 km/h for 6.0 hours. How far does it travel?
Veronika [31]

Answer:

330 km

55*6= 330 km. An easy formula for this is multiplying time with speed.

Explanation:

330 kilometros

55 * 6 = 330 km. Una fórmula fácil para esto es multiplicar el tiempo por la velocidad.

4 0
3 years ago
Read 2 more answers
Other questions:
  • A 60 kg bicyclist going 2 m/s increased his work output by 1,800 J. What was his final velocity?
    7·2 answers
  • How many moons does Venus have?
    11·2 answers
  • Development is best described as:
    7·1 answer
  • how long will it take a sonar pulse that travels at the speed of 1,500m/s to return from a sunken ship that is at a depth of 3,7
    11·2 answers
  • In some region of space, the electric field is given by E = Axi + By2j. Find the electric potential difference between points wh
    9·1 answer
  • The "zone of avoidance" a) Accounts for the absence of any planet between the orbits of Mars and Jupiter Prevents collisions bet
    5·1 answer
  • an explanation of conduction(science explanation) pleases helppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppppp
    10·1 answer
  • Which map would be most likely to cause the National Weather Service to issue a weather warning for Florida?
    8·2 answers
  • A 10kg mass is moving to the right with a velocity of 15 m/s. A 13kg mass
    10·1 answer
  • A mason stretches a string between two points 70 ft apart on the same level with a tension of 20 lb at each end. If the string w
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!