1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Mariana [72]
2 years ago
9

What is the structural unit of a substance called​

Physics
1 answer:
PSYCHO15rus [73]2 years ago
5 0

Answer: a molecule

Explanation:

You might be interested in
The density of helium gas at 0.0 ◦C is 0.16 kg/m3 kg/m3. The temperature is then raised to 100.6 ◦C, but the pressure is kept co
Svetach [21]

Answer:

0.11694 kg/m³

Explanation:

T₁ = 0.0 °C = 273.15 K

ρ₁ = Density = 0.16 kg/m³

T₂ = 100.6 °C = 373.72 °C

PV = mRT

Realtion with density

Pm=\rho RT\\\Rightarrow \rho =\frac{Pm}{RT}\\\Rightarrow \rho T= \frac{Pm}{R}

P, m and R are constants, so

\rho_1 T_1=\rho_2 T_2\\\Rightarrow \rho_2=\frac{\rho_1 T_1}{T_2}\\\Rightarrow \rho_2=\frac{0.16\times 273.15}{373.72}\\\Rightarrow \rho_2=0.11694\ kg/m^3

∴ New density of the gas is 0.11694 kg/m³

6 0
4 years ago
An object slides down a very smooth ramp, with negligible friction. It slides with constant acceleration a under the action of t
sveta [45]

Answer:

In statics condition and if is a body is over plane surface N = mg

In all cases which a body is on a ramp force N will be smaller than mg, and depending on the level of the ramp (bigger the ramp smaller force N)

Explanation:

See annex (Figure 1)

We can see with the help of force diagram the relation between  N force  and mg

Lets look first the body on the ramp assuming there is not movement

The  sum of forces alog y axis = 0

mg* cos∠ BAC = N (normal force)

So N is always a fuction of mg and of the cosine of the inclination angle, and the cosine of angle varies from value 1 when the angle is 0 (look the case where the block is on the surface without inclination N = mg ).

And as the inclination increase the value of cosine will become smaller and so will N force which is directly proportional of cosine of the inclination angle

Therefore we can say that force N is always minor than mg unless in extreme case where the block is over the surface in which case N takes its maximum value N = mg

3 0
4 years ago
Subtract the following and give the answer using significant figures 3.400-0.7591
CaHeK987 [17]

Answer:

the answer is 2.6409.

Explanation:

i asked my teacher

4 0
3 years ago
Why does an egg dropped from a higher height move faster as it reaches the ground than an egg dropped from a lower height?
nignag [31]

Answer:When an egg is dropped from a higher height, it reaches a greater speed before hitting the ground. So the egg dropped from 5 meters has a greater velocity when it strikes the ground. It thus experiences the greater velocity change during the collision.

Explanation:

8 0
3 years ago
Which explains the downward force produced when air flows over the winglike spoiler on a race car?
professor190 [17]
Newton's principle
newton's 2nd law of motion where F=ma
3 0
3 years ago
Other questions:
  • A plane traveled west for 4.0 hours and covered a distance of 4,400 kilometers. What was its velocity? 18,000 km/hr
    5·2 answers
  • One of the challenges of wind power is _____. the location of wind farms the ongoing cost of wind power that it adds carbon to t
    12·2 answers
  • Does a spherical bubble of air in a volume of water act to converge or to diverge light passing through it?
    10·1 answer
  • How much time should be allowed for a 605-mile car trip if the car will be traveling at an average speed of 55 miles per hour?
    9·2 answers
  • A hunter on a frozen, essentially frictionless pond uses a rifle that shoots 4.20 g bullets at 965 m/s. The mass of the hunter (
    5·1 answer
  • The Sun is the largest object in our (1) _____________________ . Its (2) _____________________ controls the motions of the plane
    12·1 answer
  • The ____ value of the overflow style keeps the element at the specified height and width, but cuts off excess content.
    6·2 answers
  • The image shows a portion of the periodic table. Which two elements have similar characteristics?
    7·2 answers
  • 3. What happens if an object has a negative acceleration?​
    15·2 answers
  • An rv is traveling 60 km/h along a highway at night. a boy sitting near the driver of the rv turns a flashlight on and shines it
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!