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Vladimir79 [104]

3 years ago

10

Mammals must eliminate waste products that their bodies produce. Which organ helps mammals eliminate bodily waste?

2 answers:

Arada [10]3 years ago

5 0

Answer:

Digestion helps mammals eliminate bodily waste.

Explanation:

Humans are considered mammals and we use digestion to eliminate bodily waste. Digestion has three main functions. First digestion of food, second absorption of nutrients, and third elimination of solid waste. There are two processes that take place Mechanical digestion and chemical digestion. Mechanical digestion is the chewing and breaking down of food into smaller molecules, whereas chemical digestion is the breakdown of the smaller molecules into simpler nutrients that the body can absorb and use.

strojnjashka [21]3 years ago

4 0

Answer:

appendix

Explanation:

Mammals must eliminate waste products that their bodies produce.Which organ helps mammals eliminate bodily waste?

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Consider a bicycle wheel to be a ring of radius 30 cm and mass 1.5 kg. Neglect the mass of the axle and sprocket. If a force of

Charra [1.4K]

To solve the problem it is necessary to apply the Torque equations and their respective definitions.

The Torque is defined as,

$\tau = I \alpha$

Where,

I=Inertial Moment

$\alpha =$ Angular acceleration

Also Torque with linear equation is defined as,

$\tau = F*d$

Where,

F = Force

d= distance

Our dates are given as,

R = 30 cm = 0.3m

m = 1.5 kg

F = 20 N

r = 4.0 cm = 0.04 m

t = 4.0s

Therefore matching two equation we have that,

$d*F = I\alpha$

For a wheel the moment inertia is defined as,

I= mR2, replacing we have

$d*F= \frac{mR^2a}{R}$

$d*F= mRa$

$a = \frac{rF}{ mR}$

$a = \frac{0.04*20}{1.5*0.3}$

$a=1.77 m/s^2$

Then the velocity of the wheel is

$V = a *t \\V=1.77*4 \\V=7.11 m/s$

Therefore the correct answer is D.

4 0

3 years ago

A car manufacturer claims an enginerring breakthrough, since it successfully reduced its interior noise level from 65dB to 55 dB

Stells [14]

Yes, that is truly amazing.

They significantly reduced the noise's intensity by 90%, that might be proper reaction.

<h3>What is noise?</h3>

Unwanted sound that is regarded loud, unpleasant, or disruptive to hearing is called noise.
Physically speaking, there is no difference between unwanted sound and desired sound because both are vibrations traveling through a medium like air or water.
When the brain receives and interprets a sound, a difference occurs.
Decibels are used to measure sound (dB).
A motorcycle engine operating is roughly 95 dB louder than regular conversation, which is around 60 dB louder than a whisper.
Your hearing may begin to be harmed if exposed to noise over 70 dB for an extended period of time.
Your ears can suffer instant damage from loud noise above 120 dB.

<h3>What is sound intensity?</h3>

The power carried by sound waves per unit area in a direction perpendicular to that region is known as sound intensity or acoustic intensity.
The watt per square meter is the SI measure of intensity, which also covers sound intensity.

Learn more about sound here:

brainly.com/question/14595927

#SPJ4

5 0

2 years ago

The net external force acting on an object is zero. Is it possible for the object to be traveling with a velocity that is not ze

Rzqust [24]

Answer:

Yes, this is according to the Newton's first law of motion.

Neither its direction nor its velocity changes during this course of motion.

Explanation:

Yes, it is very well in accordance with Newton's first law of motion for a body with no force acting on it and it travels with a non-zero velocity.

During such a condition the object will have a constant velocity in a certain direction throughout its motion. Neither its direction nor its velocity changes during this course of motion.

4 0

3 years ago

An automobile having a mass of 1,000 kg is driven into a brick wall in a safety test. The bumper behaves like a spring with cons

Nady [450]

To solve this problem it is necessary to apply the concepts related to the conservation of energy, specifically the potential elastic energy against the kinetic energy of the body.

By definition this could be described as

$PE = KE$

$\frac{1}{2}kx^2 = \frac{1}{2}mv^2$

Where

k = Spring constant

x = Displacement

m = mass

v = Velocity

This point is basically telling us that all the energy in charge of compressing the spring is transformed into the energy that allows the 'impulse' seen in terms of body speed.

If we rearrange the equation to find v we have

$v = \sqrt{\frac{kx^2}{m}}$

Our values are given as

$m = 1000kg$

$k = 5.75*10^6N/m$

$x = 3.12*10^{-2}m$

Replacing at our equation we have then,

$v = \sqrt{\frac{kx^2}{m}}$

$v = \sqrt{\frac{(5.75*10^6)(3.12*10^{-2})^2}{1000}}$

$v = 2.3658m/s$

Therefore he speed of the car before impact, assuming no energy is lost in the collision with the wall is 2.37m/s

4 0

3 years ago

A 6.0-kg object moving at 5.0 m/s collides with and sticks to a 2.0-kg object. After the collision the composite object is movin

gogolik [260]

Answer:

a) 23 m/s

Explanation:

Assuming no external forces acting during the collision, total momentum must be conserved, as follows:

$p_{o} = p_{f} (1)$

The initial momentum p₀, can be written as follows:

$p_{o} = m_{1} * v_{1o} + m_{2}* v_{2o} = 6.0 kg * 5.0 m/s + 2.0 kg * v_{2o} (2)$

The final momentum pf, can be written as follows:

$p_{f} = (m_{1} + m_{2} )* v_{f} = 8.0 kg* (-2.0 m/s) (3)$

Since (2) and (3) are equal each other, we can solve for the only unknown that remains, v₂₀, as follows:

$v_{2o} = \frac{-6.0kg* 5m/s -8.0 kg*2.0m/s}{2.0kg} = \frac{-46kg*m/s}{2.0kg} = -23.0 m/s (4)$

This means that the 2.0-kg object was moving at 23 m/s in a direction opposite to the 6.0-kg object, so its initial speed, before the collision, was 23.0 m/s.

6 0

3 years ago