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nydimaria [60]
3 years ago
13

__________ helps us adapt to our environment. It also generally __________ with age. A. Plasticity . . . decreases B. Developmen

t . . . increases C. Plasticity . . . increases D. Development . . . decreases
Physics
2 answers:
Nana76 [90]3 years ago
8 0
Not sure this is a physics question (probably biology).
Anyway, the correct answer is A):
"Plasticity helps us to adapt to our environment. It also generally decreases with age".
Plasticity is the ability to adapt to the environment. Since this ability is linked with brain functions, and brain functions worsen with age, then plasticity decreases with age.
grin007 [14]3 years ago
4 0

Answer: A, Plasticity ... decreases

Explanation:

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An electromagnet requires 3 things. Select the 3 components below.
notsponge [240]

Answer:

A. Battery

B. Iron Core

C. Solenoid

6 0
4 years ago
A bicyclist, initially at rest, begins pedaling and gaining speed steadily for 4.90s during which she covers 32.0m.
harina [27]

Answer:

CHAPTER 1

Conceptual Problems

C1. A room in a house has a floor area of 120 ft2

. Which of the following is most likely the

approximate volume of the room?

a. 3 m3

b. 30 m3

c. 300 m3

d. 3 000 m3

C2. When SI units are plugged into an equation, it is found that the units balance. Which of the

following can we expect to be true for this equation?

a. The equation will be dimensionally correct.

b. The equation will be dimensionally correct except sometimes in cases when the right

hand side of the equation has more than one term.

c. The equation will not be dimensionally correct.

d. All constants of proportionality will be correct.

C3. How long has it been that scientists have accepted that the nucleus of the atom consists of

neutrons and protons? Think of your answers in terms of order of magnitude.

a. about a decade

b. about a century

c. about a thousand years

d. since Aristotle

C4. Consider the sine of any angle between 30°

and 40°

. If the angle were doubled, what would

happen to the sine of the angle?

a. It would double.

b. It would more than double.

c. It would increase but be less than double.

d. In different cases, it could do any of the above.

C5. There are other ways of expressing uncertainty besides significant figures. For example,

suppose a quantity is known to have a value between 20.4 and 20.0 and our best estimate of

the value is midrange at 20.2. We could write the number as 20.2 +/- 0.2 and say that the

number has a 1% uncertainty. We would also say it has 3 significant figures. If we square a

number with 1% uncertainty (i.e., 2 parts in about 200) and 3 significant figures, what

results?

a. A number with 1% uncertainty and 3 significant figures.

b. A number with 2% uncertainty and 3 significant figures.

c. A number with 2% uncertainty and 2 significant figures.

d. A number with 1% uncertainty and 2 significant figures.

1

3 0
2 years ago
A 100-kg spacecraft is in a circular orbit about Earth at a height h = 2RE .
maria [59]

To solve this problem it is necessary to apply the concepts related to the conservation of the Gravitational Force and the centripetal force by equilibrium,

F_g = F_c

\frac{GmM}{r^2} = \frac{mv^2}{r}

Where,

m = Mass of spacecraft

M = Mass of Earth

r = Radius (Orbit)

G = Gravitational Universal Music

v = Velocity

Re-arrange to find the velocity

\frac{GM}{r^2} = \frac{v^2}{r}

\frac{GM}{r} = v^2

v = \sqrt{\frac{GM}{r}}

PART A ) The radius of the spacecraft's orbit is 2 times the radius of the earth, that is, considering the center of the earth, the spacecraft is 3 times at that distance. Replacing then,

v = \sqrt{\frac{(6.67*10^{-11})(5.97*10^{24})}{3*(6.371*10^6)}}

v = 4564.42m/s

From the speed it is possible to use find the formula, so

T = \frac{2\pi r}{v}

T = \frac{2\pi (6.371*10^6)}{4564.42}

T = 8770.05s\approx 146min\approx 2.4hour

Therefore the orbital period of the spacecraft is 2 hours and 24 minutes.

PART B) To find the kinetic energy we simply apply the definition of kinetic energy on the ship, which is

KE = \frac{1}{2} mv^2

KE = \frac{1}{2} (100)(4564.42)^2

KE = 1.0416*10^9J

Therefore the kinetic energy of the Spacecraft is 1.04 Gigajules.

8 0
3 years ago
Convert 68 centimeters into feet.
FromTheMoon [43]

Answer:

1 foot

Explanation:

your answer is 1.6

6 0
3 years ago
Read 2 more answers
Ice does not need to melt into liquid water before it can return to the atmosphere as water vapor.
Nuetrik [128]
That only happens when the temperature is below freezing and the air around the ice is dry.
6 0
3 years ago
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