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3 years ago

According to cell theory, where do new cells come from?

Physics

1 answer:

nlexa [21]3 years ago

7 0

Answer:

Explanation:

New cells come from something called cell division

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you read about a rope and pulley machine that was able to produce equal amounts of output work and input work.was this a realist

Flura [38]

<span>nope.
It is non realistic example it is the ideal one (reversible machine).
Because you have friction loss and heat which would decrease the output work.</span>

3 0

3 years ago

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Kieran takes off from rest down a 50 m high, 10° slope on his jet-powered skis. The skis have a thrust of 280 N parallel to the

xz_007 [3.2K]

Answer:0.46

Explanation:

Given

Initial height $h=50 m$

inclination $\theta =10^{\circ}$

Thrust $=280 N$

combined mass of kieran and skis $m=50 kg$

Speed at the bottom $v=40 m/s$

From Work Energy Theorem

Work done by all the force is equal to change in kinetic Energy

$W_{gravity}+W_{friction}+W_{thrust}=\frac{1}{2}mv^2-0$ ------------1

distance traveled along the slope $x=\frac{50}{\sin 10}=287.93 m$

$W_{gravity}=mgh=50\times 9.8\times 50=24500 J$

$W_{thrust}=F\times x=280\times 287.93=80,620.4 J$

$W_{friction}=-\mu mg\cos 10$

substitute in 1

$24,500+80,620.4+W_{friction}=\frac{1}{2}\times 50\times 1600$

$W_{friction}=40,000-24,500-80,620.4$

$-\mu \cdot 50\times 9.8\times 287.93=-65,120.4$

$\mu =\frac{65,120.4}{141,085.7}=0.46$

8 0

3 years ago

While watching a small fireworks display from a building 204 feet tall, you observe a rocket that travels from ground to eye lev

faltersainse [42]

204 ft = 62.2 m
We know that the initial velocity of the rocket was 0, we can find its acceleration using:
s = ut + 1/2 at²
62.2 = 0.5a(6)²
a = 3.46 m/s²
Now, the final velocity of the rocket:
v = u + at
v = 3.46 x 6
v = 20.76 m/s = 68.1 ft/s

4 0

3 years ago

What happend to the egg in the fresh water glass?

Molodets [167]

Answer:

Nothing in the fresh water

The egg will be salty in salt water

Mark as brainlist

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2 years ago

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