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jeyben [28]
3 years ago
11

A body has density of 2kg/m² and volume 2m². Find the mass of the volume​

Physics
2 answers:
creativ13 [48]3 years ago
7 0

Answer:

4kg

Explanation:

density is mass/ volume, 4/2= 2

expeople1 [14]3 years ago
3 0

Answer:

The mass is 4kg

Explanation:

Density of an object is defined as the ratio of the mass of the object to its volume. Mathematically,

Density = mass/volume

Mass is measured in kilogram (kg)

Volume is measured in m³

From the formula;

Mass = Density × volume

Mass = 2kg/m³ × 2m³

Mass = 4kg

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I really need help on this
Fed [463]
Question is not clear
3 0
3 years ago
Examine the information. A truck accelerates 3 km/h/s south. Which option correctly describes the truck’s acceleration?
Oksanka [162]

Answer:

d. Every second, the truck’s velocity increases by 3 km/h to the south.

Explanation:

Acelleration can be defined as change of velocity over change of time.

That's why if we say:  "A truck accelerates 3 km/h/s south."

We are saying that the acceleration of the truck variate 3Km/h wich is  velocity of the truck, and it variates every second and also its direction is south.

6 0
3 years ago
What thermodynamic property describes the relationship of an equilibrium to temperature?
brilliants [131]

The thermodynamic property that describes the relationship between  equilibrium and temperature is Thermodynamic equilibrium

Thermodynamics is a science that focuses on explaining chemically and physically phenomenons related to:

  • Heat
  • Temperature
  • Energy

In thermodynamics, the thermodynamic equilibrium occurs if the temperature or heat is in balance, and therefore it will not change in regular conditions. For example:

  • If a liquid has the same temperature as its surroundings, the temperature is likely to remain stable
  • The temperature of a liquid or solid does not change unless there are specific conditions
  • According to this, thermodynamic equilibrium describes the relation of equilibrium to temperature

Learn more in: brainly.com/question/22447172

4 0
2 years ago
A model rocket is fired vertically upward from rest. Its acceleration for the first three seconds is a(t) = 60t at which time th
xz_007 [3.2K]

Answer:

(a) 8.4375 s

(b) 1409.06 ft

(c) 40.55 seconds

Explanation:

v’(t)=a(t)=60t therefore

v(t)=\int 60t=60\frac {t^{2}}{2}=30t^{2}

s(t)=\int v=\int 30t^{2}=30\frac {t^{3}}{3}=10t^{3}

For first three seconds

S(3)=10*3^{3}=270

Since motion is vertical and we take upward direction as positive, acceleration is negative hence

a(t)=-32 and v(t)=\int -32=-32t+c but since at t=0 then v=270 hence c=270

-32.2t+270=0 hence

t=270/32=8.4375 s

(b)

s(t)=-16t^{2}+270t+B and since s(0)=270 then

s(t)=-16t^{2}+270t+270

s(8.4375)=-16(8.4375)^{2}+270(8.4375)+270\approx 1409.06 ft

(c)

v(15)=-32(14)+270=-178 ft/s

s(14)=-16(14)^{2}+270(14)+270=914 ft

Average speed in the next 5 seconds becomes \frac {-178-18}{2}=-98 ft/s and s(5)=98(5)=490 ft

The altitude is 914-490=424 ft

Time=\frac {424}{18}=23.6 seconds

Time when rocket hits ground

Total time=3+14+23.6=40.55 seconds

5 0
3 years ago
What is the exact amount of feet between the Earths Surface and the Moon?
garik1379 [7]
Distance between Earth and Moon = 384,400 Km

We know, 1 Km = 3280.84 Feet

So, 384,400 Km = 384,400 * 3280.84 = 1261154896

In short, Your Answer would be: 1261154896 Feet

Hope this helps!
4 0
3 years ago
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