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3 years ago

Bacteria which are able to live in extreme conditions are found in this kingdom

1 answer:

7 0

Extremophiles occur in all three domains of life: bacteria, archaea, and eukaryotes. Most extremophiles are microorganisms.

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A pendulum is made from a thin cylindrical rod pivoted at the end. It has a length of 0.30 m and radius 0.001 m. It swings up to

Art [367]

Answer:

Maximum angle is $23.91^{\circ}$ rad

Explanation:

As per the question:

length of the pendulum, L = 0.30 m

Radius of the pendulum, R = 0.001 m

Angular speed at the bottom, $\omega = 2.9\ rad/s$

Now,

To calculate the maximum angle, $\theta_{m}$ :

For the pendulum, the moment of inertia, I = $\frac{ML^{2}}{3}$

Now, using the principle of the conservation of energy:

Kinetic energy = Potential energy

$\frac{1}{2}\times I\omega^{2} = mgh$

where

h = $\frac{L}{2}(1 - cos\theta_{m})$

Thus

$\frac{1}{2}\times \frac{mL^{2}}{3}\times \omega^{2} = m\times 9.8\times \frac{L}{2}(1 - cos\theta_{m})$

$1 - cos\theta_{m} = \frac{0.3\times 2.9^{2}}{3\times 9.8}$

$theta_{m} = cos^{- 1}(0.914) = 23.91^{\circ}$

6 0

3 years ago

How do mountain building and volcanoes relate to plate motion at convergent boundaries

Naddika [18.5K]

Mountains and volcanoes are built at convergent plates in a boundary which pushes up the earth.

5 0

4 years ago

Car mass of 1167 kg accelerates on a flat highway from 10.0 m/s to 28.0 m/s. how much work does thr car's engine do on the car ?

jolli1 [7]

For the work-energy theorem, the work done by the engine on the car is equal to the variation of kinetic energy of the car:
$W= K_f-K_i=\frac{1}{2}mv_f^2 - \frac{1}{2} mv_i^2$
where m=1167 kg is the mass of the car, $v_i=10.0 m/s$ is the initial speed and $v_f=28.0 m/s$ is the final speed.

Putting numbers into the equation, we find:
$W= \frac{1}{2}(1176 kg)(28.0m/s)^2- \frac{1}{2}(1167 kg)(10.0 m/s)^2=4.0 \cdot 10^5 J$

6 0

4 years ago

Two clear but non-mixing liquids each of depth 15 cm are placed together in a glass container. The liquids have refractive indic

murzikaleks [220]

Answer:

A. 19.8 cm.

Explanation:

The apparent depth of the combination is

As it mentioned that the two clear but non-mixing liquid having depth of 15 cm that placed in a glass container together

Also the refractive indices would be 1.75 and 1.33

Based on the above information

As we know that

Refractive indices = real depth ÷ apparent depth

1.33 ÷ 1.75 = 15 ÷ apparent depth

So, it would be 19.736842 cm

Now the combination of apparent depth would be

= ( 19.736842 + 15) ÷ (1.75)

= 19.8 cm

hence, the correct option is A.

4 0

3 years ago

what is the average acceleration of a car if a car rest from 0m/s and reaches a final velocity is 50m/s in 10m/s

GuDViN [60]

Answer:

Assuming that you meant the final velocity of 50 m/s was reached in 10 s, the answer would be 5 m/s^2.

Explanation:

$V_{f} = V_{i} + at$

So we update that with the values that we have.

$50 = 0 +a(10)$

then simplify that using algebra to solve for a and we get 5 m/s^2

6 0

3 years ago