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
AysviL [449]
2 years ago
13

Read no.4 which newtons law is this? 1,2 and 3 only

Physics
1 answer:
horsena [70]2 years ago
8 0

Explanation:

In the first law, an object will not change its motion unless a force acts on it. In the second law, the force on an object is equal to its mass times its acceleration. In the third law, when two objects interact, they apply forces to each other of equal magnitude and opposite direction.

You might be interested in
A sinusoidal wave traveling on a string has a period of 0.20 s, a wavelength of 32 cm, and an amplitude of 3 cm. The speed of th
Finger [1]

Answer:

v = 1.6 \frac{m}{s} *\frac{100cm}{1m}= 160 \frac{cm}{s}

Explanation:

If we have a periodic wave we need to satisfy the following basic relationship:

v = \lambda f

From the last formula we see that the velocity is proportional fo the frequency.

For this case we have the following info given by the problem:

T= 0.2 s, \lambda =32 cm* \frac{1m}{100cm} =0.32 m, A= 3cm*\frac{1m}{100 cm}=0.03 m

We know that the frequency is the reciprocal of the period so we have this formula:

f = \frac{1}{T}

And if we replace we got:

f =\frac{1}{0.2 s}= 5Hz

Now since we have the value for the wavelength we can find the velocity like this:

v = 0.32 m * 5Hz = 1.6 \frac{m}{s}

And if we convert this into cm/s we got:

v = 1.6 \frac{m}{s} *\frac{100cm}{1m}= 160 \frac{cm}{s}

6 0
3 years ago
Choose the correct statement concerning units of power or energy. a. A kilojoule (kJ) is a unit of power. b. A gigawatt (GW) is
sergiy2304 [10]

Answer:

A kilowatt (kW) is a unit of power.

Explanation:

The power of an object is given by :

P=\dfrac{E}{t}

Here,

E is the energy required

t is time

The SI unit of power is Watts and the SI unit of energy is Joule. the commercial unit of energy is kilowatt per hour.    

Option (1) :  A kilojoule (kJ) is a unit of power is incorrect.

Option (2) : A gigawatt (GW) is a unit of energy is incorrect.

Option (3) : A watt (W) is a unit of energy is incorrect.

Option (4) : A kilowatt x hour per year (kWh/yr) is a unit of energy is incorrect.

Option (4) : A kilowatt (kW) is a unit of power is correct.

Hence, the correct option is (d).

3 0
3 years ago
Thermals created by warm air rising and cold air sinking are called___?
Kay [80]
It is called convection
8 0
3 years ago
What class of lever is shown below?
Oxana [17]

A

The class lever that take that is first class lever which is A

3 0
2 years ago
A sound wave is moving through air. The wave has a wavelength of 0.65 m and a frequency of 512 Hz. Calculate the speed of the wa
nexus9112 [7]

Answer:

"332.8 m/s" is the right solution.

Explanation:

The given values are:

Wavelength,

\lambda=0.65  \ m

Frequency,

f = 512 \ Hz

As we know,

⇒  Speed=Frequency\times Wavelength

or,

⇒  V=f\times \lambda

By putting the given values in the above relation, we get

⇒     =512\times 0.65

⇒      =332.8 \ m/s

6 0
2 years ago
Other questions:
  • A red ball is thrown down with an initial speed of 1.1m/s from a height of 28 meters above the ground. Then 0.5 seconds after th
    5·1 answer
  • What new characteristic did John Dalton add to the model of the atom? An atom is a round, solid mass. An atom has a massive, pos
    13·2 answers
  • As you jump on a pogo stick where is the potential energy the greatest?
    14·1 answer
  • Help please 80pnts and brainliest guaranteed
    7·1 answer
  • PLEASE HURRYYY
    11·1 answer
  • What is the efficiency of a machine?​
    14·1 answer
  • A crate remains stationary after it has been placed on a ramp inclined at an angle with the horizontal. Which of the following s
    13·1 answer
  • What type of energy does friction produce?
    6·1 answer
  • A force of 50 N was necessary to lift a rock. A total of 150 J of work was done. How far was the rock lifted? ​
    15·1 answer
  • An open train car rolls along a track while it is being filled with sand. There is negligible friction. As a result of
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!