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kirill115 [55]
3 years ago
10

Laura leaves her house to go to the mall to pick out a gift for her grandma. On her way back home she stopped to grab some coffe

e. What is her displacement when she goes back home? Explain.
Physics
1 answer:
poizon [28]3 years ago
7 0
Displacement is zero. That’s because she ended up where she started.
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On average, each person in the industrialized world is responsible for the emission of 10,000 kg of carbon dioxide () every year
frosja888 [35]

Answer:

17.2 meters

Explanation:

Carbon dioxide (CO2) molecular mass is 44g/mol, then the number of moles of 10000kg carbon dioxide will be:

10,000kg * (1000g/kg)/  (44g/mol) = 227,272moles

The volume of gas in STP is 22.4 L/mol, then the volume of the carbon dioxide will be:

227,272 moles* 22.4L/mol= 5,090,909 L

One liter equal to 0.001 meter cubic. The formula for cube volume is side^{3\\}, if the volume is 5090909L then the side of the cube will be:

volume= side^{3\\}

5090909L * (0.001 m^{3\\}/L)= side^{3\\}

side= \sqrt[3]{5090.909}

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7 0
3 years ago
What would the acceleration of a car be from a stoplight if it started at 0 m/s and reached a
trapecia [35]

Answer:

The acceleration of a car would be:  a=12.8 m/s²

Explanation:

Given

Initial velocity = v_1=0 m/s

Final velocity = v_f=100 m/s

Time elapsed = t = 7.8 s

To determine

We need to determine the acceleration of a car.

We know that acceleration is basically the rate of change in velocity over time.

Thus,

We can determine the acceleration using the formula

\:\:\:a=\:\frac{v_f-v_i}{t}

where

  • a is the acceleration
  • v_1 is the initial velocity
  • v_f is the final velocity
  • t is time elapsed

now substituting the values v_1=0,  v_f=100, and t = 7.8 in the formula

\:\:\:a=\:\frac{v_f-v_i}{t}

a=\:\frac{100-0}{7.8}

a=\frac{100}{7.8}

a=12.8 m/s²

Therefore, the acceleration of a car would be:  a=12.8 m/s²

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2 years ago
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Soil formation involves both
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2 years ago
Sandy is whirling a ball attached to a string in a horizontal circle over his head. If Sandy doubles the speed of the ball, what
jeka57 [31]

The tension in the string B) It quadruples.

Explanation:

The ball is in uniform circular motion in a horizontal circle, so the tension in the string is providing the centripetal force that keeps the ball in circular motion. So we can write:

T= m\frac{v^2}{r}

where:

T is the tension in the string

m is the mass of the ball

v is the speed of the ball

r is the radius of the circle (the lenght of the string)

In this problem, we are told that the speed of the ball is doubled, so

v' = 2v

Substituting into the previous equation, we find the new tension in the string:

T' = m \frac{(2v)^2}{r}=4(m\frac{v^2}{r})=4T

Therefore, the tension in the string will quadruple.

Learn more about circular motion:

brainly.com/question/2562955

brainly.com/question/6372960

#LearnwithBrainly

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