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3 years ago

Which type of macromolecules a cell brake down food?

Physics

1 answer:

kobusy [5.1K]3 years ago

8 0

Answer:

Hope this helps you find the answer

Explanation:

The proteins, lipids, and polysaccharides that make up most of the food we eat must be broken down into smaller molecules before our cells can use them—either as a source of energy or as building blocks for other molecules.

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Which electromagnetic waves have a higher frequency than visible light

kenny6666 [7]

The ones that we call 'ultraviolet', 'X-rays', and 'gamma rays' all have
higher frequency (shorter wavelength) than visible light.

7 0

3 years ago

What would the force be on a 14.5 kg object that was accelerating 2.7 m/s^2

Natasha_Volkova [10]

Answer:

Explanation:

The force acting on an object given it's mass and acceleration can be found by using the formula

force = mass × acceleration

From the question we have

force = 14.5 × 2.7

We have the final answer as

Hope this helps you

5 0

3 years ago

A teenager of mass m1 = 72 kg pushes backward against the ground with his foot as he rides his skateboard. This exerts a horizon

Ray Of Light [21]

Answer:

The acceleration of the skateboard is -9.65 m/s².

Explanation:

Given that,

Mass of teenager = 72 kg

Force $F_{foot}=11\ N$

Mass of skateboard = 2.8 kg

Suppose, the determine the numerical value for the magnitude of the acceleration of skateboard

We need to calculate the acceleration of skateboard

Using balance equation

$F-(m_{1}+m_{2})g=(m_{1}+m_{2})a$

Put the value into the formula

$11-(72+2.8)\times9.8=(72+2.8)\times a$

$a=\dfrac{11-(72+2.8)\times9.8}{(72+2.8)}$

$a=-9.65\ m/s^2$

Hence, The acceleration of the skateboard is -9.65 m/s².

5 0

3 years ago

How is the pressure of a gas related to its concentration of particles?A) Pressure will expand a gas, enlarging its volume and r

Lesechka [4]

Answer:

C) Pressure will compress a gas, reducing its volume and giving it a greater density and concentration of particles.

Explanation:

At constant temperature, pressure and volume are inversely related.

P V = constant

$\Rightarrow P \propto \frac{1}{V}$

As the pressure increases, the gas compresses, the particles come closer reducing the volume of gas.

As we know, with decrease in volume, density increases.

$Density = \frac{Mass}{Volume}$

$Density \propto \frac{1}{Volume}$

Thus, the pressure of a gas is directly related to concentration of particles. Increase in pressure causes increase in concentration of the particles.

8 0

3 years ago

A fast pitch softball player does a "windmill" pitch, moving her hand through a vertical circular arc to pitch a ball at 65 mph.

astraxan [27]

a) The centripetal acceleration is $1694 m/s^2$

b) The force on the ball is 321.9 N

c) The direction of the force is upward

Explanation:

The centripetal acceleration of an object in circular motion is given by

$a=\frac{v^2}{r}$

where

v is the speed of the object

r is the radius of the circle

In this problem, we have:

r = 50 cm = 0.50 m (the radius of the circle is equal to the distance between the shoulder and the ball)

$v=65 mph \cdot \frac{1609 m/mi}{3600 s/h}=29.1 m/s$ is the speed

Substituting,

$a=\frac{29.1^2}{0.50}=1694 m/s^2$

The force exerted by the hand on the ball is equal to the centripetal force, which is given by:

$F=ma$

where

m is the mass of the ball

a is the centripetal acceleration

In this problem, we have:

m = 0.19 kg

$a=1694 m/s^2$

Substituting, we find:

$F=(0.19)(1694)=321.9 N$

In a uniform circular motion, the direction of the centripetal acceleration is always towards the centre of the circle.

As a result, since the direction of the force is the same as the direction of the acceleration, the direction of the centripetal force is also towards the centre of the circle.

Therefore in this case, since the ball is at the lowest point in the circle, the direction of the force is upward (because it is towards the centre of the circular trajectory).

Learn more about centripetal force and acceleration:

brainly.com/question/2562955

#LearnwithBrainly

4 0

4 years ago