All categories

3 years ago

A scientist is studying all living things on the planet. The focus of his/her study is on the _____.

Physics

2 answers:

ollegr [7]3 years ago

5 0

Answer:

biosphere

Explanation:

bagirrra123 [75]3 years ago

3 0

The scientist is studying thr biosphere

You might be interested in

Bro why cant I post this T-T

Leni [432]

Answer: 12.0 m/s^2

Explanation:

Let $\alpha$ be the angular acceleration of the end of the rod

Taking torque about the link, we have:

$\tau = W \times OM\\ or\\ \tau = mg\times \left(\dfrac{L}{2}\right)\sin 55^\circ ....(i)$

Torque is also given in terms of moment of inertia of the rod and its angular acceleration i.e.

$\tau = I_{rod}\ \alpha......(ii)$

From equations (i) and (ii) we have:

$mg\times \left(\frac{L}{2}\right)\sin 55^\circ = \left(\frac{mL^2}{3}\right)\alpha\ \ \ \ \ \ \ (\because I_{rod} = \dfrac{mL^2}{3}) \\ \\ \alpha = \left(\frac{3g}{2L}\right)\sin 55^\circ\\ \\ \alpha = \left(\frac{3\times 9.8}{2\times 2.4}\right)\sin 55^\circ\\ \\ \boxed{\alpha = 5.02\ rad/s^2} }$

The acceleration of the end of the rod farthest from the link is given by:

$a = L\alpha\\ \\ a = (2.4\ m)(5.02\ rad/s^2)\\ \\ \boxed{a = 12.0\ m/s^2}$

7 0

2 years ago

A liquid with a mass of 75 g is at its boiling point. It completely boils off when AQ = 15000000) of heat energy is added to it.

aev [14]

Answer:

2 × 10⁸J/kg

Explanation:

Specific latent heat of vaporization (steam) is the quantity of heat required or needed to change a unit of mass of liquid to gaseous state at constant temperature (boiling point) and pressure.

It can be calculated mathematically using,

Q = mL

Where, Q = quantity of heat

m= mass in kg

L = specific latent heat (J/kg)

Therefore,from the question

Q= 15000000J

mass (m) = 75g = 75/1000 kg = 0.075kg

Q = mL

L = Q/m

L = 15000000 ÷ 0.075

L= 200000000J/kg

L = 2 × 10⁸J/kg

I hope this was helpful, please mark as brainliest

8 0

3 years ago

What are 2 ways organisms would be affected by water pollution?

Ymorist [56]

Not having clean water to drink or bath. Also some organizations that live in the water might die because the water is polluted and that would be toxic form them

7 0

4 years ago

A motorist travels first part of a trip at an average speed of 35 km/h and covers an equal distance in the second part. If he ha

Jlenok [28]

The average speed of the motorist in the second half of the journey is determined as 7 km/h.

<h3>What is average speed?</h3>

The average speed of an object is the ratio of total distance to total time of motion.

Let his average speed in the second half = x

21 = (35 + x) / 2

35 + x = 42

x = 42 - 35

x = 7 km/h

Thus, the average speed of the motorist in the second half of the journey is determined as 7 km/h.

Learn more about average speed here: brainly.com/question/6504879

#SPJ1

7 0

3 years ago

A simple generator has a square armature 9.0 cm on a side. The armature has 95 turns of 0.59-mm-diameter copper wire and rotates

Marrrta [24]

Answer:

f = 3.102 Hz

Explanation:

In this case you have that the required voltage is the maximum induced emf produced by the rotating generator.

In order to calculate the frequency of rotation of the generator that allows one to obtain 12.0V you use the following formula:

$emf_{max}=NBA\omega$ (1)

N: turns of the armature = 95

B: magnitude of the magnetic field = 0.800T

A: area of the square armature = (9.0cm)^2 = (0.09m)^2 = 8.1*10^-3 m^2

emf_max = 12.0V

w: angular frequency

you solve the equation (1) for w:

$\omega=\frac{emf_{max}}{NBA}=\frac{12.0V}{(95)(0.800T)(8.1*10^{-3}m^2)}\\\\\omega=19.49\frac{rad}{s}$

Then, the frequency is:

$f=\frac{\omega}{2\pi}=\frac{19.49rad/s}{2\pi}=3.102Hz$

7 0

3 years ago