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
katrin [286]
3 years ago
11

Consider a 2250-lb automobile clocked by law-enforcement radar at a speed of 85.5 mph (miles/hour). if the position of the car i

s known to within 5.0 feet at the time of the measurement, what is the uncertainty in the velocity of the car?
Physics
2 answers:
bagirrra123 [75]3 years ago
7 0

Answer:

<em>dV =3.39x10^-38 m/s</em>

Explanation:

Consider a 2250-lb automobile clocked by law-enforcement radar at a speed of 85.5 mph (miles/hour). if the position of the car is known to within 5.0 feet at the time of the measurement, what is the uncertainty in the velocity of the car?

According to the Heisenberg uncertainty law  which states tat te

product of uncertainty in position and uncertainty in momentum will be constant

\Delta x . \Delta P = \frac{h}{4\pi}

\Delta x . m \Delta v = \frac{h}{4\pi}

Mass(automobile)= 2150 lbs

1lbs=0.453592kg so:

2250 lbs= 1020.3 kg

Uncertainty(delta X)= 5ft

1ft= 0.3048m so:

5ft= 1.524m

h= Planck's constant = 6.62606957 × 10-34 m2 kg / s

(delta V) = (delta P)/ Mass

Solving the original equation we get:

(delta V) = h/( (4pi)(Mass)(delta X) )

= (6.626X10^-34)/( (4pi)( 1020.3 kg )(1.524m)

dV =3.39x10^-38 m/s

the uncertainty in the velocity of the car is dV =3.39x10^-38 m/s

Korvikt [17]3 years ago
4 0

As per law of Heisenberg uncertainty law

product of uncertainty in position and uncertainty in momentum will be constant

\Delta x . \Delta P = \frac{h}{4\pi}

\Delta x . m \Delta v = \frac{h}{4\pi}

now plug in all data

(5\times 0.3048). (2250 \times 0.454) \Delta v = \frac{6.6 \times 10^{-34}}{4\pi}

\Delta v = 3.37 \times 10^{-38} m/s

So above is the uncertainty in velocity of the object

You might be interested in
2. A person standing at
elena-s [515]
God is good man what can you say but its 18.66x30301=362728
7 0
3 years ago
I need help on this question!!!
Irina-Kira [14]
2500
--------=3125
0.8

This can be can be viewed as compression due to the direction of the arrows.
7 0
3 years ago
3. An astronaut on a space-walk swings a 0.5 kg metal tool in a circular path at the end of a cable 3.6 m long. The astronaut th
Semenov [28]

Answer:

Explanation:

2 km a hour

6 0
3 years ago
-4, 0, -2/3, 4.11111…, 2, π, √6 'which members of this set are irrartional?
krok68 [10]

An irrational number is a real number that cannot be written as a simple fraction.

4 = 4/1 = rational

0 = 0/1 = rational

-2/3 = rational

4.11111 = irrational

2 = 2/1 = rational

π = 3.141592... = irrational

√6= irrational

Answer:

4.1111, π , √6

3 0
1 year ago
Carbon is allowed to diffuse through a steel plate 15 mm thick. The concentrations of carbon at the two faces are 0.65 and 0.30
beks73 [17]

Answer:

T=575.16K

Explanation:

To solve the problem we proceed to use the 1 law of diffusion of flow,

Here,

J=-D\frac{\Delta C}{\Delta x}

\Delta C is the rate in concentration

\Delta xis the rate in thickness

D is the diffusion coefficient, where,

D= D_0 exp(\frac{Q_d}{RT})

Replacing D in the first law,

J=-(D_0 exp(\frac{-Q_D}{RT}))\frac{\Delta }{\Delta x}

clearing T,

T=\frac{Q_d}{R*ln(\frac{J*\Delta x}{D_0*\Delta C})}

Replacing our values

T=-\frac{80000}{8.31*ln(\frac{(6.2*10^{-7})(-15*10^{-3})}{(1.43*10^{-9})(0.65-0.30)})}

T=-\frac{80000}{-138.09}

T=575.16K

4 0
3 years ago
Other questions:
  • What does 'equivalence' mean in circuit diagrams​
    9·1 answer
  • A space station sounds an alert signal at time intervals of 1.00 h . Spaceships A and B pass the station, both moving at 0.400c0
    7·1 answer
  • A runner runs 10 miles in 1 hour. how far could they run in 2 hours in m/s?
    12·1 answer
  • Vector B has x, y, and z components of 2.2, 6.6, and 5.5 units, respectively.
    11·1 answer
  • Why do the sun and moon seem to move across the sky each day? the Earth’s rotation the sun’s rotation the moon’s revolution the
    15·1 answer
  • Intravenous infusions are often made under gravity.
    7·1 answer
  • When one force acts, a second force is produced that is _______ and opposite to the original force?
    7·2 answers
  • The resultant of two forces acting on the same point simultaneously will be the greatest when the angle between them is:a) 180 d
    11·1 answer
  • Làm thế mào để kiểm tra một lục ma sát trược
    6·1 answer
  • Ned is learning about cells in science class. He drew a picture to model a cell. What can he show with his cell drawing?
    12·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!