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4 years ago

According to Binet, mental age relates to chronological age because ___________.

Physics

1 answer:

mamaluj [8]4 years ago

8 0

<em>Its B fam, hope you get that good grade.</em>

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Arrange the homeostasis process in the right sequence.

spayn [35]

1. Cold environment

2. Muscle contractions

3. shivering and goosebumps

4 Increase body temperature

3 0

4 years ago

A particle of mass m=5.00 kilograms is at rest at t=0.00 seconds. a varying force f(t)=6.00t2−4.00t+3.00 is acting on the partic

olga_2 [115]

Answer:

The speed v of the particle at t=5.00 seconds = 43 m/s

Explanation:

Given :

mass m = 5.00 kg

force f(t) = 6.00t2−4.00t+3.00 N

time t between t=0.00 seconds and t=5.00 seconds

From mathematical expression of Newton's second law;

Force = mass (m) x acceleration (a)

F = ma

$a = \frac{F}{m}$ ...... (1)

acceleration (a) $= \frac{dv}{dt}$ ......(2)

substituting (2) into (1)

Hence, F $= \frac{mdv}{dt}$

$\frac{dv}{dt} = \frac{F}{m}$

$dv = \frac{F}{m} dt$

$dv = \frac{1}{m}Fdt$

Integrating both sides

$\int\limits {} \, dv = \frac{1}{m} \int\limits {F(t)} \, dt$

The force is acting on the particle between t=0.00 seconds and t=5.00 seconds;

$v = \frac{1}{m} \int\limits^5_0 {F(t)} \, dt$ ......(3)

Substituting the mass (m) =5.00 kg of the particle, equation of the varying force f(t)=6.00t2−4.00t+3.00 and calculating speed at t = 5.00seconds into (3):

$v = \frac{1}{5} \int\limits^5_0 {(6t^{2} - 4t + 3)} \, dt$

$v = \frac{1}{5} |\frac{6t^{3} }{3} - \frac{4t^{2} }{2} + 3t |^{5}_{0}$

$v = \frac{1}{5} |(\frac{6(5)^{3} }{3} - \frac{4(5)^{2} }{2} + 3(5)) - 0|$

$v = \frac{1}{5} |\frac{6(125)}{3} - \frac{4(25)}{2} + 15 |$

$v = \frac{1}{5} |\frac{750}{3} - \frac{100}{2} + 15 |$

$v = \frac{1}{5} | 250 - 50 + 15 |$

$v = \frac{215}{5}$

v = 43 meters per second

The speed v of the particle at t=5.00 seconds = 43 m/s

6 0

3 years ago

Which of the following is a function of a flower? a. attract animals c. attract bugs b. disperse pollen d. all of the above

Ivanshal [37]

the answer is all of the above

8 0

3 years ago

Where are the sun's rays the strongest, which makes the ocean water the warmest ?

IgorC [24]

The Gamma Rays are the strongest. This would be located near the core of the sun. What makes ocean water the warmest depends on the season we are in. This is all due to the energy input into the sun.

8 0

3 years ago

You hear three beats per second when two sound tones are generated. The frequency of one tone is known to be 610 Hz. The frequen

mestny [16]

Answer:

F. Either B or C

Explanation:

The beat frequency is the difference of two frequencies of two waves.

Here, one wave has frequency 610 Hz and the beat frequency is 3 beats per second.

It is not mentioned which has a higher frequency. So, there are two possiblities.

$\Delta f=|610-613|=3$

$\Delta f=|610-607|=3$

Hence, the frequency of the other wave is 613 or 607.

4 0

3 years ago