Name two elements would be incorrectly placed if the periodic table was ordered by atomic mass rather than atomic number

What do we mean when we describe forces as balanced?

aivan3 [116]

Well, first, let's recognize that there is no such thing as a force that is
balanced or unbalanced.

When we say that a group of two or more forces is balanced, we mean
that when you add up all the magnitudes and directions of the forces, the
whole group adds up to zero, so they have the same net effect as if there
were no force at all.

3 0

3 years ago

How many slices of bread did each climber have to eat to compensate for the increase of the gravitational potential energy of th

ICE Princess25 [194]

Answer:

Each climber had to eat 72 slices of bread to compensate for the increase of the gravitational potential energy of the system climbers-Earth

Explanation:

Hi

One piece of bread releases about $1.0 \times 10^{6}J$ of energy in the body, but efficiency in converting the body's chemical energy into mechanical work is 9.5 %, so $1.0 \times 10^{6}J(9.5\%)=95\times 10^{3} J$ .

On the other hand, we need to calculate the total work to reach the top of Mt. Everest , so $W=mgh=(79 Kg)(9.8 m/s^{2})(8850 m)=6.8 \times 10^{6}J$

Finally, we have that $\# slices=\frac{W}{Energy/Slice} =\frac{6.8 \times 10^{6}J}{95\times 10^{3} J} =72 \ slices \ of \ bread$

8 0

3 years ago

At what temperature (degrees Fahrenheit) is the Fahrenheit scale reading equal to (a) 2 times that of the Celsius and (b) 1/4 ti

castortr0y [4]

Answer:

(a) F = 320

(b) = F = -5.1625

Explanation:

The formula that converts degree Celsius (C) to degree Fahrenheit (F) is:

F = 1.8C + 32

Solving (a): F = 2C

Substitute 2C for F in the above equation

F = 1.8C + 32

2C = 1.8C + 32

Collect like terms

2C - 1.8C = 32

0.2C = 32

Multiply both sides by 5

5 * 0.2C = 32 * 5

C = 160

Recall that F = 2C

F = 2 * 160

F = 320

Solving (b): F = ¼C

Substitute ¼C for F in the above formula

F = 1.8C + 32

¼C = 1.8C + 32

Convert fraction to decimal

0.25C = 1.8C + 32

Collect like terms

0.25C - 1.8C = 32

-1.55C = 32

Divide both sides by -1.55

C = 32/(-1.55)

C = -32/1.55

C = -20.65

Recall that: F = ¼C

F = -¼ * 20.65

F = -5.1625

5 0

3 years ago

Upon impact, bicycle helmets compress, thus lowering the potentially dangerous acceleration experienced by the head. A new kind

Nana76 [90]

Answer:

-15.3g

Explanation:

We can find the acceleration by using the following SUVAT equation:

$v^2 - u^2 = 2ad$

where:

v = 0 is the final velocity (the headform comes to rest)

u = 6.0 m/s is the initial velocity before the impact

d = 12.0 cm = 0.12 m is the distance covered during the impact

a is the acceleration

Solving for a, we get

$a=\frac{v^2-u^2}{2d}=\frac{0^2-6^2}{2(0.12)}=-150.0 m/s^2$

Where the negative sign means it is a deceleration.

Now we know that

$g=9.8 m/s^2$

So we can express the acceleration in units of g:

$a=\frac{-150.0}{9.8}=-15.3g$

4 0

3 years ago

Compare and contrast the thalamus with the hypothalamus in regards to location, function, and what each helps to regulate

aleksley [76]

The thalamus supports in emotional processing and arousal purposes and the chief input for sensory info. It connects with the cerebrum. It is situated in the forebrain between the cerebrum and hypothalamus. The hypothalamus is situated below the thalamus. The hypothalamus is an essential center for many perilous internal body functions. The hypothalamus observes water concentration, hormone absorptions and body temperature. It is related with moods of rage, violence, hunger and thirst.

7 0

3 years ago