How much work does gravity do on the mountain climber if they rappel down the mountain

Choose the best description for prokaryotic cell.

klasskru [66]

Answer:

has no nucleus; found in unicellular organisms

Explanation:

Prokaryotic cells are primitive cells found in lower organisms. Prokaryotic cells do not have a true cell.

A true nucleus lacks an envelope which contains the nuclear materials.
Most of the organelles lacks membrane bound organelles.
The true nucleus is lacking in prokaryotes.

Eukaryotic cells have true nucleus.

7 0

3 years ago

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A gyroscope flywheel of radius 1.96 cm is accelerated from rest at 13.0 rad/s2 until its angular speed is 2270 rev/min. (a) What

nika2105 [10]

Tangential acceleration of a point on the rim of the flywheel during this spin-up process is 0.2548 m/s².

Tangential acceleration is defined as the rate of change of tangential velocity of the matter in the circular path.

Given,

Radius of flywheel (r) = 1.96 cm = 0.0196m

Angular acceleration (α)= 13.0 rad/s²

The tangential acceleration formula is at=rα

where, α is the angular acceleration, and r is the radius of the circle.

using the formula; at=rα = (13.0 rad/s²) (0.0196m) = 0.2548 m/s².

The tangential acceleration is 0.2548 m/s².

Learn more about the Tangential acceleration with the help of the following link:

brainly.com/question/15743294

#SPJ4

5 0

2 years ago

An arteriole has a radius of 25 μm and it is 1000 μm long. The viscosity of blood is 3 x 10-3 Pa s and its density is 1.055 g cm

timama [110]

Answer: $1.955(10)^{13} \frac{Pa.s}{m^{3}}$

Explanation:

This can be solved by the Poiseuille’s law for a laminar flow:

$R=\frac{8 \eta L}{\pi r^{4}}$

Where:

$R$ is the resistance of the arteriole

$\eta=3(10)^{-3} Pa.s$ is the viscosity of blood

$L=1000 \mu m=1000(10)^{-6}m$ is the length of the arteriole

$r=25 \mu m=25(10)^{-6}m$ is the radius of the arteriole

$R=\frac{8 (3(10)^{-3} Pa.s)(1000(10)^{-6}m)}{\pi (25(10)^{-6}m)^{4}}$

$R=1.955(10)^{13} \frac{Pa.s}{m^{3}}$

3 0

4 years ago

A uniform electric field exists in a region between two oppositely charged plates. An electron is released from rest at the surf

Agata [3.3K]

Answer:

3.53 N/C

Explanation:

Electric field = F / q where F is the force in N and q is charge on the electron

F = mass of an electron × a ( acceleration in m/s)

using equation of motion to solve for the acceleration

s ( distance ) = ut + 0.5 at² since the electron is starting from rest then ut = 0

2s / t² = a

F = me × ( 2s / t²)

E electric field = me × ( 2s / t²) / q = me × 2s / ( t² × q)

me, mass of an electron = 9.11 × 10⁻³¹ kg

E = (9.11 × 10⁻³¹ kg × 2 × 0.038 m) / ( (3.5 × 10⁻⁷s)² × 1.6 × 10⁻¹⁹ C) = 0.0353 × 10² N/C = 3.53 N/C

5 0

3 years ago

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Which of the following illustrates 2 resistors in a series circuit?

umka2103 [35]

Explanation :

An electrical circuit can be either connected in series or parallel.

Series combination: The current flowing in each resistor is the same and the equivalent resistance is given by :

$R{eq}=R_1+R_2+R_3+.................+R_n$

Parallel combination: The voltage for all components in the parallel combination is the same. The equivalent resistance is given by :

$\dfrac{1}{R_{eq}}=\dfrac{1}{R_{1}}+\dfrac{1}{R_{2}}+\dfrac{1}{R_{3}}......................+\dfrac{1}{R_{n}}$

So, our of given options the correct one is (b) because the current flowing in both the resistors is the same.

5 0

4 years ago

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