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pantera1 [17]
3 years ago
15

Which statement accurately describes the chemical symbol of an element?

Physics
2 answers:
Mekhanik [1.2K]3 years ago
8 0

The chemical symbol always begins with a capital letter.

.


Assoli18 [71]3 years ago
3 0

Answer:

the chemical symbol always begins with a capital letter

Explanation:

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A high frequency sound wave corresponds to high _____.
lina2011 [118]
A highly frequency sound wave corresponds to a high pitch sound
6 0
3 years ago
Please help with this question, step by step<br><br>Thank you!
mamaluj [8]

From the calculation, the force constant is 192 N. Also, friction would decrease the extension.

<h3>What is the force constant?</h3>

We know that the force constant can be obtained by the use of the relation;

F = Ke

F = applied force

K = force constant

e = extension

We know from Hooks law that the force applied is directly proportional to the extension.

We can write;

F = mgcosθ

F = 43 Kg * 9.8 m/s^2 * sin31°

F = 217 N

K = 217 N/1.13 m

K = 192 N/m

If there is friction between the incline and the crate, it will stretch less because some work will be lost due to friction causing only some fraction of the elastic potential energy to be converted to kinetic energy.

Learn more about Hooke's law:brainly.com/question/14140269

#SPJ1

7 0
2 years ago
In an engine, an almost ideal gas is compressed adiabatically to half its volume. In doing so, 2820 J of work is done on the gas
Dmitry_Shevchenko [17]

Answer:

  1. Q=0
  2. U=2820
  3. Energy increases

Explanation:

From the question we are told that

Work done W=2820

a)Generally the heat flow for an adiabatic process is 0 (zero)

Q= U + W =>0

Q=0

b)Generally Change in internal energy of gas is mathematically given by

Since W=-2820J

Therefore

U=2820

Giving

Q= 2820 -2820

Q=O

c)With increases in internal energy brings increase in temperature

Therefore

Energy increases

3 0
3 years ago
The distance covered by a car moving with a speed of 36 km/h in 15m is (a) 0.9 km (b) 9.0 km (C) 90 km (d) 900 km​
GuDViN [60]

This is a uniform rectilinear motion exercise.

To start solving this exercise, we obtain the following data:

<h3>Data:</h3>
  • v = 36 km/h
  • d = ¿?
  • t = 15 min = 0.25 hr

                                     Minutes to hour converter

                                                  60 min = 1 hour

                                       \boldsymbol{\sf15\not{min}*\dfrac{1 \ hr}{60 \not{min}}=0.25 \ hr  }}

To calculate distance, speed is multiplied by time.

We apply the following formula: d = v * t

We substitute our data into the formula:

                                     \boldsymbol{\sf{d=v*t}}

                                     \boldsymbol{\sf{d=36 \dfrac{km}{\not{h}}*0.25 \not{h} }}

                                     \boldsymbol{\sf{d=9 \ km}}

The distance traveled by a car moving with a speed of 36 km/h in 15 m is 9 km.

  • Therefore, the correct option is "B".
8 0
2 years ago
Read 2 more answers
When you drop a ball it accelerates downward at 9.8 m/s^2. If instead you 5 points
dangina [55]

Answer:

if you need an actual number answer you can use   :Vf = Vi + at.  If you throw the ball it will have an initial force beside gravity accelerating the fall temporarily from greater than throw it downwards, its acceleration (in the absence of air resistance) will be greater than  9.8 m/s2 until it slows back down to a constant 9.8 m/s2 after ( t )amount of time

Explanation:

If you drop a ball, it accelerates downward at 9.8 m/s2. if instead you throw the ball straight downwards While throwing, we apply an additional force other than the gravitational force.

This gives an additional, temporary acceleration along with the gravitational acceleration.

Thus from the instant it is thrown and the instant it leaves your hand, the object is under variable acceleration, the variation of acceleration being the reason of the varying force which we do apply on the object. But once it leaves our hand it is always under constant acceleration of g which is9.8 m/s2

5 0
3 years ago
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