4 years ago

Water that flows from behind a large dam can cause machines to produce electricity. What change takes place?

1 answer:

8 0

The mechanical energy in the falling water is used to spin the generator, and gets transformed into electrical energy. That's the first choice on the list.

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A bicyclist increases her speed from 4.0 m/s to 6.0 m/s. The combined mass of the bicyclist and the bicycle is 55 kg. How much w

11Alexandr11 [23.1K]

Kinetic energy of the horse and rider = 1/2 (mass) (speed)²

At 4.0 m/s : KE = 1/2 (55kg) (4 m/s)² = 440 joules

At 6.0 m/s : KE = 1/2 (55kg) (6 m/s)² = 990 joules

She increased the kinetic energy of herself and her vehicle by 550 joules,
so she must have put at least that much work into it.

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4 years ago

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Which change in an object would increase the force needed to move the object

creativ13 [48]

Answer:

force is the answer because force is pushing the item

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3 years ago

Which of the following forms matter?<br> A. Proteins<br> B.atoms<br> C.cells<br> D. DNA

Artemon [7]

Answer:b) atoms

Explanation:which are in turn made up of protons, neutrons and electrons

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3 years ago

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Please help with this, oh and bungee gum contains both the properties of rubber AND gum you see?

Sladkaya [172]

Can I still get 5 points bc u already figured it out

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3 years ago

2. Un ciclista que está en reposo comienza a pedalear hasta alcanzar los 16.6km/h en 6 minutos. Calcular la distancia total que

jek_recluse [69]

Answer:

$s = 5822.28\,m\,(5.822\,km)$

Explanation:

La distancia recorrida es la suma de las etapas de aceleración y velocidad constante (Travelled distance is the sum of the acceleration and constant speed stages). La aceleración es (The acceleration is):

$a = \frac{4.611\,\frac{m}{s}-0\,\frac{m}{s}}{360\,s}$

$a = 0.013\,\frac{m}{s^{2}}$

La distancia recorrida es (The travelled distance is):

$s = \frac{1}{2}\cdot \left(0.013\,\frac{m}{s^{2}} \right)\cdot (360\,s)^{2} + \left(4.611\,\frac{m}{s} \right)\cdot (1080\,s)$

$s = 5822.28\,m\,(5.822\,km)$

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3 years ago