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k0ka [10]
4 years ago
13

Jim takes 45 seconds to walk 180 m north to a store . What is James velocity in meters per second?

Physics
1 answer:
solmaris [256]4 years ago
4 0

4m/s due north of the store

Explanation:

Given parameters:

Time taken = 45s

Displacement = 180m

Unknown

Velocity = ?

Solution:

Velocity is the displacement of a body per unit time. Velocity is a vector quantity that has both magnitude and direction.

   Velocity = \frac{displacement}{time} = \frac{180}{45}

   Velocity = 4m/s due north of the store

Learn more:

Velocity brainly.com/question/10883914

#learnwithBrainly

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Answer:4748.36

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4 years ago
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Three cars (car F, car G, and car H) are moving with the same velocity when the driver suddenly slams on the brakes, locking the
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Answer:

a) Option D

b) Option A

Explanation:

a) Option D

Because a massive car will have more inertia which will make the car move faster but a massive car simultaneously will have more friction thereby restricting its movement in the forward direction. Hence, all the three cars will move equal distance.

b) Option A, Car F

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3 years ago
Milk containing 3.7% fat and 12.8% total solids is to be evaporated to produce a product containing 7.9% fat. What is the yield
ratelena [41]

Answer:

the yield of product is YP=46.835 % and the concentration of solids is

Cs = 27.33%

Explanation:

Assuming that all the solids and fats remains in the milk after the evaporation, then the mass of product mP will be

Mass of fat in 100 kg of milk = 100 kg* 0.037 = mP* 0.079

mP = 100 kg* 0.037/0.079  =  46.835 kg

then the yield YP of the product is

YP= mP / 100 kg =  46.835 kg / 100 kg = 46.835 %

YP= 46.835 %

the concentration of solids Cs is

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Cs = 100 kg* 0.128 / 46.835 kg  = 0.2733 = 27.33%

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3 0
3 years ago
A 15-ft3 tank contains oxygen initially at 14.7 psia and 80°F. A paddle wheel within the tank is rotated until the pressure insi
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Explanation:

Equation for energy balance will be as follows.

         \Delta E_{system} = E_{in} - E_{out}

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Therefore, we will calculate the final temperature as follows.

            \frac{P_{1}V}{T_{1}} = \frac{P_{2}V}{T_{2}}

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Now, we will calculate the mass as follows.

             m = \frac{P_{1}V}{RT_{1}}

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Putting the values into the above equation as follows.

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Answer:

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