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
a_sh-v [17]
3 years ago
8

Please help me thank you !!!!

Physics
1 answer:
Fantom [35]3 years ago
5 0

Answer:

<em>UP</em>

Explanation:

heat flows from higher level to lower level

( higher concentration to lower concentration )

and since temperature in above block is less than the lower block, the heat will flow from lower block to higher block .

( Up )

You might be interested in
How much electrical energy is used by a 400 W toaster that is operating for 5
andrew11 [14]

Answer:

The answer is C. 120,000 J.

Explanation:

8 0
2 years ago
Which of the following statements about floating objects is always true? a. The object’s density is greater than the density of
Yuki888 [10]
It should be C. If the object is denser than the fluid, it will sink. If it isn't, it will float
6 0
3 years ago
Read 2 more answers
The time required to produce one cycle of a wave is known as the waves
eimsori [14]
The time described above is known as the waves Period.
The time which it takes for a particle to complete one full cycle is known as the period. Period is normally measured in seconds. Frequency on the other hand is the number of cycles which are completed in a given period of time e.g a second. periodic time T is given by reciprocal of frequency (1/f).
6 0
3 years ago
Two small plastic spheres are given positive electrical charges. When they are a distance of 14.8cm apart, the repulsive force b
sdas [7]

Answer:

Explanation:

Case I: They have same charge.

Charge on each sphere = q

Distance between them, d = 14.8 cm = 0.148 m

Repulsive force, F = 0.235 N

Use Coulomb's law in electrostatics

F=\frac{Kq_{1}q_{2}}{d^{2}}

By substituting the values

0.235=\frac{9\times10^{9}q^{2}}{0.148^{2}}

q=7.56\times10^{-7}C

Thus, the charge on each sphere is q=7.56\times10^{-7}C.

Case II:

Charge on first sphere = 4q

Charge on second sphere = q

distance between them, d = 0.148 m

Force between them, F = 0.235 N

Use Coulomb's law in electrostatics

F=\frac{Kq_{1}q_{2}}{d^{2}}

By substituting the values

0.235=\frac{9\times 10^{9}\times 4q^{2}}{0.148^{2}}

q=3.78\times10^{-7}C

Thus, the charge on second sphere is q=3.78\times10^{-7}C and the charge on first sphere is 4q = 4\times 3.78\times 10^{-7}=1.51 \times 10^{-6} C.

6 0
3 years ago
A uniform rod is set up so that it can rotate about a perpendicular axis at one of its ends. The length and mass of the rod are
igor_vitrenko [27]

Answer:

0.231 N

Explanation:

To get from rest to angular speed of 6.37 rad/s within 9.87s, the angular acceleration of the rod must be

\alpha = \frac{\theta}{t} = \frac{6.37}{9.87} = 0.6454 rad/s^2

If the rod is rotating about a perpendicular axis at one of its end, then it's momentum inertia must be:

I = \frac{mL^2}{3} = \frac{1.27*0.847^2}{3} = 0.303kgm^2

According to Newton 2nd law, the torque required to exert on this rod to achieve such angular acceleration is

T = I\alpha = 0.303*0.6454 = 0.196 Nm

So the force acting on the other end to generate this torque mush be:

F = \frac{T}{L} = \frac{0.196}{0.847} = 0.231 N

4 0
3 years ago
Other questions:
  • A teacher uses the model that little invisible gremlins speed up or slow down objects and the direction they push gives the dire
    11·2 answers
  • What's the movement of a stationary object?
    8·1 answer
  • PLS HELP YOU BEAUTFUL PPL
    8·1 answer
  • As the frequency of sound waves increases, the wavelength of the sound waves decreases. true or false.
    15·1 answer
  • When objects are charged by _______, they do not need to touch each other.
    11·1 answer
  • Three moles of neon expand isothermally from 0.163 m3 to 0.254 m3 while 5.09 × 103 J of heat flows into the gas. Assuming that n
    11·1 answer
  • Sven's team put its insulated ice cube into a sealed plastic container. Which
    14·1 answer
  • Is a pair of sneakers a want or a need? Is the most expensive pair of sneakers a want or a need?
    5·1 answer
  • 7. Which phase changes require a gain of energy (heat)?
    9·2 answers
  • To remove a nut from an old rusty bolt, you apply a 100-N force to the
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!