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Luden [163]
3 years ago
14

Can anyone help me solve number 5

Physics
1 answer:
Shtirlitz [24]3 years ago
6 0
What subject is this?
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A uniform disk with a mass of 5.0 kg and diameter 30 cm rotates on a frictionless fixed axis through its center and perpendicula
igomit [66]

Answer:

Angular acceleration of the disk will be \alpha =10.714rad/sec^2

Explanation:

We have given mass of the disk m = 5 kg

Diameter of the disk d = 30 cm = 0.3 m

So radius r=\frac{d}{2}=\frac{0.3}{2}=0.15m

Moment of inertia of disk is given by I=\frac{1}{2}mr^2=\frac{1}{2}\times 5\times 0.15^2=0.056kgm^2

Force is given by F=4 N

Torque is given as \tau =Fr=4\times 0.15=0.6N-m

We also know that torque is given by \tau =I\alpha

0.6=0.056\times \alpha

\alpha =10.714rad/sec^2

5 0
3 years ago
an airplane releases a ball as it flies parallel to the ground at a height of 235m. if the ball lands on the ground exactly at 2
Oksanka [162]
<span>When the question says the ball lands a distance of 235 meters from the release point, we can assume this means the horizontal distance is 235 meters. Let's calculate the time for the ball to fall 235 meters to the ground. y = (1/2)gt^2 t^2 = 2y / g t = sqrt{ 2y / g } t = sqrt{ (2) (235 m) / (9.81 m/s^2) } t = 6.9217 s We can use the time t to find the horizontal speed. v = d / t v = 235 m / 6.9217 s v = 33.95 m/s Since the horizontal speed is the speed of the plane, the speed of the plane is 33.95 m/s</span>
7 0
3 years ago
A student rides her bicycle to school, which is 6 km north of her home. After school, she rides to the grocery store that is 2 k
Free_Kalibri [48]
The total distance traveled from home to the grocery store would be 8km.

Because both distances she traveled were in the same direction, north, both displacement and distance travel were equal.

If the student traveled in two different directions, such as north to the school and south to the grocery store, her distance traveled would be 8km but her displacement would only be 6km.  
3 0
3 years ago
Infrasounds _____.
LiRa [457]

Infra sounds are sounds with frequencies below 20 Hz.The popular concept that infra sounds are in audible holds false

Explanation:

  • Some example of Infrasounds  are- some animals such as whales, elephants and giraffes which  communicate with each other  using infrasound over long distances.
  • Various natural phenomenon such as Avalanches, volcanoes, earthquakes, ocean waves, water falls and meteors also generate infrasonic waves
  • Infrasound, is sound that is lower in frequency than 20 Hz or cycles per second.
  • Even the human body can generate mechanical vibrations at very low frequencies, which are known as the  infrasonic waves. Such low-frequency vibrations/infrasonic waves  are produced by physiological processes—such as heartbeats, respiratory movements, blood flow in vessels, and other processes.
5 0
3 years ago
Which items would have this energy transformation: chemical energy -&gt; mechanical energy?
dsp73

Answer:

La transformación energética, transformación de la energía, conversión energética o conversión de la energía es el proceso de cambiar la energía de un tipo de energía a otro. En física, la energía es una cantidad que proporciona la capacidad de realizar un trabajo (por ejemplo, levantar un objeto) o proporciona calor. Además de ser convertible, de acuerdo con la ley de conservación de la energía, la energía es transferible a una ubicación u objeto diferente, pero no se puede crear ni destruir.

La energía en muchas de sus formas se puede utilizar en procesos naturales o para proporcionar algún servicio a la sociedad, como calefacción, refrigeración, iluminación o realizar trabajos mecánicos para operar máquinas. Por ejemplo, para calentar una casa, el horno quema combustible, cuya energía potencial química se convierte en energía térmica, que luego se transfiere al aire de la casa para elevar su temperatura.

Explanation:

5 0
3 years ago
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