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3 years ago

What’s the velocity of a bike ride taking 45 mins over a distance of 4km

Physics

1 answer:

Y_Kistochka [10]3 years ago

8 0

The speed of the ride is

Speed = (distance covered) / (time to cover the distance)

Speed = (4,000 m) / (45 min)

Speed = 88.89 m/s

Speed = 1.481 m/s

Speed = 5.333 km/hr

There's not enough information given in the question to calculate the velocity of the ride. For example ...

-- If the ride was completely in a straight line, then the velocity would be exactly equal to the speed.

-- If the rider went 2km from his house and then 2km back home again, his velocity for the whole ride would be zero.

We just don't know from the information given.

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A piece of aluminum (bulk modulus 7.1 x 1010 N/m2) is placed in a vacuum chamber where the air pressure is 0.781 x 105 Pa. The v

Jet001 [13]

Answer:

${\dfrac{\Delta V}{V}}=11\times 10^{-7}$

Explanation:

Given that

Bulk modulus ,K = 7.1 x 10¹⁰ Pa

The pressure P₁ = 0.781 x 10⁵ Pa

The final pressure P ₂ = 0 Pa

We know that bulk modulus given as

$K=\dfrac{\Delta P}{\dfrac{\Delta V}{V}}$

Now by putting the values

$K=\dfrac{\Delta P}{\dfrac{\Delta V}{V}}$

$7.1\times 10^{10}=\dfrac{0.781\times 10^5}{\dfrac{\Delta V}{V}}$

${\dfrac{\Delta V}{V}}=\dfrac{0.781\times 10^5}{7.1\times 10^{10}}$

${\dfrac{\Delta V}{V}}=11\times 10^{-7}$

Therefore fractional change will be 11 x 10⁻⁷.

3 0

4 years ago

What is the Octet rule

egoroff_w [7]

Answer:

the octate rule says that electron after completing all the valency of the element doesnot goes as 9 but continues next round after completing the next octat then the first shell completes the all electron valency .thanks if you dont understand then please comment l will try to solve your confusion

5 0

4 years ago

ECONOMICS !!!!

gulaghasi [49]

Answer:

Explanation:

Absolute advantage is the capability of a commercial entity to produce goods using fewer resources compared to rivals. Using the same inputs, an entity with an absolute advantage produces a larger output compared to competitors. It means the firm has a lower marginal cost of production. Therefore, its products will have the lowest prices in the market.

6 0

3 years ago

8. You push downward on a box with a force of 750 N. The box is on a flat horizontal surface for which the coefficient of static

natima [27]

Answer:

The mass of the heaviest box you will be able to move with this applied force = 61.4 kg

Explanation:

From the diagram attached, the forces acting on the box include the weight of the box, applied force on the box, normal reaction of the surface on the box and the Frictional force in the opposite direction to the applied force.

For the box to be able to move, the applied force must have a horizontal component that at least matches the Frictional force between the box and the surface. This is the force balance in the horizontal direction.

Resolving the applied force into horizontal and vertical components,

Fₓ = 750 cos 25° = 679.73 N

Fᵧ = 750 sin 25° = 316.96 N

Doing a force balance in the vertical axis,

N = (mg + 316.96)

Frictional force = μN = μ (mg + 316.96)

μ = 0.74, g = 9.8 m/s²

Frictional force = Fᵧ

μ (mg + 316.96) = 679.73

0.74(9.8m + 316.96) = 679.73

7.252m + 234.5504 = 679.73

7.252m = 679.73 - 234.5504 = 445.1796

m = (445.1796/7.252)

m = 61.4 kg

Hope this Helps!!!

6 0

3 years ago

When you serve the ball, if the ball does not land in the opposite side rectangle this is called a ______. question 2 options: f

Novay_Z [31]

Answer:

its called a fault

Explanation:

Its when u mess up

4 0

2 years ago