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3 years ago

Whats the formula of mass? example Density= mass/volume

2 answers:

8 0

There are a few ways to calculate mass. You can do Density * Volume. But you can also do Weight/Gravitational Constant (9.81 m/s2 on earth)

DochEvi [55]3 years ago

4 0

The formula for mass you can find from the density equation. Multiply the volume by both sides of the equation.

density = mass/volume

volume*density = mass

And there you are :)

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Anatomy and Phys PLEASE HELP

Alina [70]

least two STDs that are caused by different microorganisms (such as bacteria, viruses, and so on). Propose at least two ethical strategies for helping to prevent these STDs OTHER THAN abstinence and male and female condoms.

6 0

3 years ago

A navy diver hears the underwater sound wave from an exploding ship across the harbor. They immediately lift their head out of t

tamaranim1 [39]

Answer:

s = 1800 m = 1.8 km

Explanation:

The distance, the speed, and the time of reach of the sound are related by the following formula:

$s = vt$

where,

s = distance

v = speed

t = time

FOR WATER:

$s = v_wt$ ---------------------- eq (1)

where,

s = distance between ship and diver = ?

$v_w$ = speed of sound in water = 1440 m/s

t = time taken by sound in water

FOR AIR:

$s = v_a(t+4\ s)$ ---------------------- eq (2)

where,

s = distance between ship and diver = ?

$v_a$ = speed of sound in water = 344 m/s

t + 4 s = time taken by sound in water

Comparing eq (1) and eq (2),because distance remains constant:

$v_wt=v_a(t+4\ s)\\\\(1440\ m/s)t = (344\ m/s)(t+4\ s)\\(1440\ m/s - 344\ m/s)t=1376\ m\\t = \frac{1376\ m}{1096\ m/s}$

t = 1.25 s

Now using this value in eq (1):

$s = (1440\ m/s)(1.25\ s)$

4 0

3 years ago

A crate of eggs is located in the middle of the flatbed of a pickup truck as the truck negotiates a curve in the flat road. The

oksian1 [2.3K]

Answer:

v = 14.35 m/s

Explanation:

As we know that crate is placed on rough bed

so here when pickup will take a turn around a circle then in that case the friction force on the crate will provide the necessary centripetal force on the crate

So here we have

$\mu mg = \frac{mv^2}{R}$

here we have

$\mu g = \frac{v^2}{R}$

now we know that

$v = \sqrt{\mu Rg}$

here we have

$\mu = 0.600$

R = 35 m

g = 9.81 m/s/s

now plug in all values in above equation

$v = \sqrt{(0.600)(35)(9.81)}$

$v = 14.35 m/s$

4 0

3 years ago

At which temperature do the lattice and conduction electron contributions to the specific heat of Copper become equal.

sp2606 [1]

Answer:

At 3.86K

Explanation:

The following data are obtained from a straight line graph of C/T plotted against T2, where C is the measured heat capacity and T is the temperature:

gradient = 0.0469 mJ mol−1 K−4 vertical intercept = 0.7 mJ mol−1 K−2

Since the graph of C/T against T2 is a straight line, the are related by the straight line equation: C /T =γ+AT². Multiplying by T, we get C =γT +AT³ The electronic contribution is linear in T, so it would be given by the first term: Ce =γT. The lattice (phonon) contribution is proportional to T³, so it would be the second term: Cph =AT³. When they become equal, we can solve these 2 equations for T. This gives: T = √γ A .

We can find γ and A from the graph. Returning to the straight line equation C /T =γ+AT². we can see that γ would be the vertical intercept, and A would be the gradient. These 2 values are given. Substituting, we f ind: T =

√0.7/ 0.0469 = 3.86K.

4 0

3 years ago

The force that accelerates objects towards earth

Anastasy [175]

The answer is Gravity.

8 0

3 years ago

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