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3 years ago

Which scientist stated that all cells arise from preexisting cells?

Physics

2 answers:

Veseljchak [2.6K]3 years ago

6 0

Answer:

Rudolf Virchow

Explanation:

the cell theory is usually attributed to Rudolf Virchow for his his beautiful work. The cell theory states that ;

Cell is the fundamental unit of life in living organisms
all organisms are made up of one or more cells
All cells exist from other pre-existing cells by division
All cells are basically the same in chemical composition.

kirill [66]3 years ago

3 0

Answer:

Matthias Schleiden

Cell theory was eventually formulated in 1839.

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A 25 newton force applied on an object moves it 50 meters. The angle between the force and displacement is 40.0°. What is the va

zloy xaker [14]

Answer:

The value of work being done on the object is 958J.

Explanation:

Work done is equal to force multiply by distance, but when the angle is between the force and distance work done=Force (cos theta) × distance

Work done = Force(cos theta) × distance

Work done = 25N(cos 40.0°) × 50m

Work done = 25N(0.7660) × 50m

Work done = 19.15N × 50m

Work done = 957.5J = 958J

Therefore the value of work being done on the object is 958J.

3 0

2 years ago

Each shot of the laser gun favored by Rosa the Closer, the intrepid vigilante of the lawless 22nd century, is powered by the dis

Alisiya [41]

Answer:

a) 4.94e9 J b) 1.07e10 J

Explanation:

The electric potential energy stored in a capacitor, expressed in terms of the value of the capacitance C, and the voltage between its terminals V, is as follows:

$U =\frac{1}{2}*C*V^{2}$

a) For the original capacitor, we can find directly U as follows:

$U =\frac{1}{2}*1.81F*(73.9e3)^{2} V2 = 4.94e9 J$

U = 4.94*10⁹ J

b) Prior to find the electric potential energy of the upgraded capacitor, we need to find out the value of the capacitance C of this capacitor, which is identical to the original, except that has a different dielectric constant.

As the capacitance is proportional to the dielectric constant, we can write the following proportion:

ε₂ / ε₁ = $\frac{943}{435}= \frac{C2}{C1} =\frac{Cx}{1.81F}$

$Cx =\frac{1.81F*943}{435} = 3.92 F$

Once calculated the new value of the capacitance, as V remains the same, we can find the electric potential energy for the upgraded capacitor as follows:

$U =\frac{1}{2}*3.92F*(73.9e3)^{2} V2 = 1.07e10 J$

⇒ U = 1.07*10¹⁰ J

8 0

3 years ago

anice measured the mass and the volume of an object. She then determined the density of the object by dividing the object’s mass

Debora [2.8K]

<h2>Answer: g/cm³</h2>

Explanation:

Since mass is being divided by volume, the units must also represent this ratio. Since mass can be given in grams and volume in cubic centimeters, then g/cm³ is the likely answer in this case.

3 0

3 years ago

Read 2 more answers

Pls help me with my work

Alenkinab [10]

I think it’s the first diagram

5 0

3 years ago

An airplane flies with a constant speed of

mafiozo [28]

The airplane is traveling 620mph, or 620m/60 minutes

Divide 270 by 60 to find the number of hours the plane is flying.
270/60 = 4.5

The plane will fly for 4.5 hours. Speed * time = Distance (make sure units are the same)
620mph*4.5hr = 2,790 miles

5 0

3 years ago