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3 years ago

Help please whats an example of kinetic energy

Physics

2 answers:

miss Akunina [59]3 years ago

8 0

Answer:

An airplane has a large amount of kinetic energy in flight due to its large mass and fast velocity.

Explanation:

Otrada [13]3 years ago

6 0

Answer:

A semi-truck travelling down the road has more kinetic energy than a car travelling at the same speed because the truck's mass is much more than the car's. A river flowing at a certain speed comprises kinetic energy as water has certain velocity and mass.

Explanation:

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Which statement accurately describes current electricity?

horsena [70]

Answer:

D. It is caused by flowing negatively charged particles.

Explanation:

Current electricity is caused by flowing negatively charged particles. Current flows in a direction opposite the that of the charged particles.

The negatively charged particles can be electrons or ions in solutions.

As the electrons flows, current is generated in the opposite direction.

The potential difference is what drives the current and it is dependent on the available energy in the cell.

6 0

3 years ago

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What is the acceleration of a car that maintains a constant velocity of 100km/h for 10 s

Mademuasel [1]

A constant velocity means the acceleration is zero.

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3 years ago

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A rectangular dam is 101 ft long and 54 ft high. If the water is 35 ft deep, find the force of the water on the dam (the density

blsea [12.9K]

To solve this problem we will begin by finding the pressure through density and average depth. Later we will find the Force, by means of the relation of the pressure and the area.

$P = \rho h$

Here,

h = Depth average

$\rho$ = Density

Moreover,

$\text{Density of water}= \rho = 62.4lb/ft^3$

Replacing,

$P = (62.4lb/ft^3)(\frac{35}{2}ft)$

$P = 1092 lb/ft^2$

Finally the force

$\text{Force} = \text{Pressure}\times \text{Area of dam with water acting on it}$

$F = 1092lb/ft^2(101ft*52ft)$

$F = 5.735*10^6lbf$

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3 years ago

What is the mass of a tennis ball traveling with a velocity of 3 m/s and a momentum of

ELEN [110]

Answer:

Explanation:

P = mv

m = P/v

m = .25/3 = .08 Kg ... A

5 0

3 years ago

Boyle's law says that the volume of a gas varies inversely with the pressure. when the volume of a certain gas is 5l, the pressu

Mrac [35]

Boyle's law states:
pV = C, where p = pressure, V = volume, C = constant.

Therefore,
p1V1 = p2V2

And the,
p2 = p1V1/V2
p1 = 512 kPa
V1 = 5l
p2 =?
V2 = 4l

Therefore,
p2= 512*5/4 = 640 kPa

8 0

4 years ago