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
DedPeter [7]
3 years ago
15

A tightly sealed glass jar is an example of which type of system?

Physics
2 answers:
Katarina [22]3 years ago
7 0
Thermal expansion and contraction, specifically the different coefficients of thermal expansion between glass & metal is a closed system ; D
noname [10]3 years ago
4 0

D. hope it helps. :D

You might be interested in
Why are such scientific advances still valuable?
Sergeu [11.5K]
Because the more advances made in the world means the more we can learn on how things work and how we can better the lives of humans and other species. If we didn't have scientific advancements we wouldn't have cell phones, electric, tv, car, computers, ect. We would still be living in Cave man era with clubs and horrible language skills.
4 0
3 years ago
A cylindrical tungsten filament 14.0 cmcm long with a diameter of 1.00 mmmm is to be used in a machine for which the temperature
Advocard [28]

Answer:

Resistivity ρ=1.12 x 10^-4 Ωm

Explanation:

ρ= RA/l, where R is resistance, A is cross sectional area and l is length

A=πr^2

Note Current is given R is proportion to temperature and inversely proportional to Current R=(20+273)/14*10^-2 =2000Ω

⇒ρ=R*πr^2/l all length in metre.

8 0
3 years ago
Where is the epicenter of the hypothetical earthquake as shown in the illustration below?
Genrish500 [490]

Answer:

Point D

Explanation:

The epicenter of a hypothetical earthquake is located at the point where the earthquake begins.

(See the attached image).

Hope it helps!

5 0
3 years ago
A pendulum can be formed by tying a small object, like a tennis ball, to a string, and then connecting the other end of the stri
Usimov [2.4K]

Answer:

1- t^3

2- t^2

3- t1

Explanation:

The acceleration produced in a body, while travelling in a circular motion, due to change in direction of motion is called centripetal acceleration. The formula of the centripetal acceleration is as follows:

ac = v²/r

where,

ac = centripetal acceleration

v = speed

r = radius

for a constant radius the centripetal acceleration will be directly proportional to the speed of object. The speed of pendulum will be lowest at t1 due to zero speed initially. Then the speed will increase gradually having greater speed at t^2 and the highest speed and centripetal acceleration at t^3. Therefore, the three instants in tie can be written in following order from greatest centripetal acceleration to lowest:

<u>1- t^3</u>

<u>2- t^2</u>

<u>3- t1</u>

5 0
3 years ago
Cindy exerts a force of 40 newtons and moves a chair 6 meters. Her brother Andy pushes a different chair for 6 meters while exer
klasskru [66]
Work formula:
W = F * d
F 1 = 40 N, d 1 = 6 m;
F 2 = 30 N; d 2 = 6 m.
W ( Cindy ) = 40 * 6 = 240 Nm
W ( Andy ) = 30 * 6 = 180 Nm
The difference of their amounts if work:
240 Nm - 180  Nm = 60 nm

hope it helps!
3 0
3 years ago
Other questions:
  • A 20 kilogram ball rolls down a 10 meter ramp at the rate of 15 meters per second. The kinetic energy is joules
    8·1 answer
  • What is the distance between two spheres, each with a charge of 2.5 x 10-6 c, when the force between them is 0.50 n?
    14·1 answer
  • What ions are formed when hcl dissolves in water?
    5·1 answer
  • If different groups of scientist have access to the same data, how can they draw different conclusions?
    5·1 answer
  • Which planets can never be seen at midnight? A. The Superior planets. B. The Inferior planets C. All planets can be seen at midn
    10·1 answer
  • This is a device used to change the flow of electricity through a circuit
    8·2 answers
  • What is power, and what is its relationship to voltage and amperage?
    14·1 answer
  • A wave travels one complete cycle in20sec and has wavelength of 1000mm.what is the speed​
    8·1 answer
  • Do machines create less work? Example: pulley system
    10·1 answer
  • Next, Stacy measures two quantities: the mass of each washer and the force that the washers exert on the force meter. In general
    8·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!