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
jok3333 [9.3K]
3 years ago
15

Select the correct answer,

Physics
1 answer:
Tresset [83]3 years ago
4 0

Answer:

I'm pretty sure it's air pressure.

Explanation:

You might be interested in
What is the power of 10 when 0.00503 is written in scientific notation
Sergeeva-Olga [200]
The answer is 10^-3.
5 0
3 years ago
What is a rubens tube
Free_Kalibri [48]

Answer:

its an antique physics apparatus for demonstrating acoustic standing waves in a tube.

6 0
3 years ago
2. A woman prevents a 3kg brick from falling by pressing it against a vertical wall. The coefficient of friction
Anettt [7]
<h3>Answer:</h3>

49 N

<h3>Explanation:</h3>

<u>We are given;</u>

  • Mass of the brick as 3 kg
  • The coefficient of friction as 0.6

We are required to determine the force that must be applied by the woman so the brick does not fall.

  • We need to importantly note that;
  • For the brick not to fall the, the force due to gravity is equal to the friction force acting on the brick.
  • That is; Friction force = Mg

But; Friction force = μ F

Therefore;

μ F = mg

0.6 F = 3 × 9.8

0.6 F = 29.4

      F = 49 N

Therefore, she must use a force of 49 N

6 0
3 years ago
A woman places her briefcase on the backseat of her car. As she drives to work, the car negotiates an unbanked curve in the road
PSYCHO15rus [73]

Answer:

The force that cause the centripetal acceleration is the static friction, and the briefcase begin to move if the force of centripetal acceleration exceeds the force due to the static friction

Explanation:

Given data:

r = radius = 54.5 m

v = speed of the car = 12.4 m/s

The force due to the static friction that is exerted on the curve in the road is what causes the centripetal acceleration. If the force due to centripetal acceleration is greater than the force of static friction, then the briefcase will begin to roll.

6 0
3 years ago
The number of vacancies in some hypothetical metal increases by a factor of 5 when the temperature is increased from 1080 K to 1
Elena L [17]

Answer:

E = 15.7 KJ/mol

Explanation:

The number of vacancies in a metal is given by

      n = n₀ e^{-E/KT}

They tell us that

     n = 5 no

We replace

      5 n₀ = n₀   e^{-E/KT}

      -E / KT = ln 5

       E = KT ln 5

       E = 1,381 10⁻²³  1170 ln 5

        E = 2.6 10⁻²⁰ J

To take (J / mol) we multiply between Avogadro's number

        E = 2.6 10⁻²⁰ 6.022 10²³

        E = 1.57 10⁴ J / mol

        E = 15.7 KJ/mol

6 0
3 years ago
Other questions:
  • SpongeBob noticed that his favorite pants were not as clean as they used to be. His friend Sandy told him that he should try usi
    15·1 answer
  • the three major scales used to measure earthquakes are Mercalli scale Richard scale and magnitude scale
    14·1 answer
  • Jennifer and Katie are leaning on each other. Jennifer weighs 150 and Katie weighs 120. Which one is pushing harder on the other
    10·2 answers
  • Weight is measured as the downward force of __________.
    12·1 answer
  • The first part of the brain to be stimulated and affected by alcohol is the
    9·1 answer
  • A Dodge Stealth is driving at 70 mph on a highway. It passes a BMW going the same direction. The BMW is moving 7 mph backward re
    6·1 answer
  • You sit "at rest" in front of your computer to answer this question. But you sit on the surface of a planet that spins, so even
    5·1 answer
  • a person throws a ball in such a way that its speed is zero at one particular point in its path. How did the person throw the ba
    8·1 answer
  • A 4.0 kg shot put is thrown with 30 N of force. What is its acceleration?
    15·1 answer
  • The drawings show three charges that have the same magnitude but may have different signs. In all cases the distance d between t
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!