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Marianna [84]
3 years ago
7

4. Coloca las partes en orden para formar una frase.

Physics
1 answer:
Rainbow [258]3 years ago
7 0

La energía no se crea ni se destruye solo se transforma

Explanation:

espero y te ayude

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What is the pressure exerted by an elephant who weighs 2500N and whose feet cover an area of 7.5m2?
qaws [65]

Answer:

0.00339905404

Explanation:

kg: 0.00339905404

pascals: 333.333333

pounds: 0.0483459126

8 0
3 years ago
NEED HELP PLEASE!!!
kenny6666 [7]

Answer:

The gravitational potential energy the barbells have at the maximum height, is P.E. = 3680·h J = 1.10 × 10⁴ units

Where;

h = The maximum height to which he lifts the barbells

Explanation:

The given parameters are;

The  amount of work done by the championship lifter in lifting the weight, W = 1.10 × 10⁴ units

The weight of the barbells lifted by the championship lifter, N = 3680 N

The gravitational potential energy, P.E., the barbells had at their maximum height of lift is given as follows;

P.E. = m × g × h

Where;

m = The mass of the barbells;

g = The acceleration due to gravity = 9.8 m/s²

h = The maximum height to which the barbells are lifted by the championship weight lifter

m × g = The weight of the barbells = 3680 N

∴ P.E. = 3680 N × h = 3680·h J

By the conservation of energy principle, work done by the championship weight lifter = The maximum gravitational potential energy gained by the barbell = The gravitational potential energy at the maximum height, P.E.

∴ The gravitational potential energy the barbells have at the maximum height, P.E. = 3680·h J = W = 1.10 × 10⁴ units

3 0
2 years ago
An elevator cab and its load have a combined mass of 1200 kg. Find the tension in the supporting cable when the cab, originally
Nadya [2.5K]

Answer:

10044 N

Explanation:

The acceleration of the cab is calculated using the equation of motion:

v^2 = u^2+2as

<em>v</em> is the final velocity = 0 m/s in this question, since it is brought to rest

<em>u</em> is the initial velocity = 10 m/s

<em>a</em> is the acceleration

<em>s</em> is the distance = 35 m

a = \dfrac{v^2-u^2}{2s} = \dfrac{(0 \text{ m/s})^2-(10 \text{ m/s})^2}{2\times (35\text{ m})} = -1.43\text{ m/s}^2

Since it accelerates downwards, its resultant acceleration is

a_R = g + a

<em>g</em> is the acceleration of gravity.

a_R = (9.8-1.43)\text{ m/s}^2 = 8.37\text{ m/s}^2

The tension in the cable is

T = ma_R = (1200\text{ kg})(8.37\text{ m/s}^2) = 10044 \text{ N}

3 0
3 years ago
Which statement correctly compares sound and light waves?
jek_recluse [69]

Answer:light waves carry energy parallel to the motion Of The wave, while sound waves carry energy perpendicular to it

Explanation:light waves carry energy parallel to the motion Of The wave while sound waves carry energy perpendicular to it

4 0
3 years ago
Read 2 more answers
Which of the following requirements must be present to hear a sonic boom?
Lorico [155]

Answer:

D) The velocity of the airplane must be greater than the speed of sound

Explanation:

Sonic boom is a phenomenon that occurs when an airplane travels ay a velocity greater than the speed of sound.

When this condition is met, the sound waves produced by the airplane (mainly from the engine) is not able to travel ahead of the plane, because the plane is moving at a greater speed than the sound itself; as a result, it is only transmitted behind the plane.

In this situation, a shock wave is produced. This shock wave is associated with a very loud "bang", that can be heard clearly even at several kilometers distance (in fact, supersonic planes are normally not allowed to fly over residential areas. In the past, for example the Concorde, was only allowerd to fly at supersonic speed over the ocean).

So the correct answer is

D) The velocity of the airplane must be greater than the speed of sound

6 0
3 years ago
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