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shtirl [24]
3 years ago
7

Which of the following is a benefit to exericse?

Physics
1 answer:
NNADVOKAT [17]3 years ago
6 0

Answer: Health is a benefit it can reduce the risk of heart disease as well as help you control your weight. It can also help you improve your mental health and mood. It can also help keep your thinking, learning, and judgement skills sharp as you age.

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Nanosecond and microsecond, which one is greater? ​
german
Microsecond is greater

A microsecond is 0.000 001 second and one thousand times longer than 1 nanosecond, which is 0.000 000 001 second.
3 0
3 years ago
Read 2 more answers
Which best describes what is required for any sound wave to travel?
olganol [36]

Answer:

Any medium solid, liquid or gas is required for sound waves to travel.

Explanation:

A sound wave requires a medium to travel. Sound waves are mechanical waves that is why these waves require a medium to travel. Sound waves can travel through solids, liquids, and gases.

In solids, the particles of the medium are closely packed together as compared to liquids and gases. In liquids, particles are less tightly packed and almost negligible in gases.

Therefore sound waves produce vibration in the dense or solid medium. Denser the medium faster the sound waves travel. However sound waves can not travel through empty space.

8 0
4 years ago
Read 2 more answers
A 50.0-kg box rests on a horizontal surface. The coefficient of static friction between the box and the surface is 0.300 and the
Dimas [21]

Answer:

98N and 147N

Explanation:

We have the following information:

m=50kg\\\mu_s =0.4\\\mu_k = 0.2\\F=140N

We can find the static fricton force as follow,

F=\mu_s * N

Where N is the normal force (mg)

F=0.3*50*9.8\\F=147N

Static friction force at 147N is greater than the force applied hence body does not move.

F=\mu_k N = 0.2*50*9.8= 98N

3 0
4 years ago
A flat coil of wire consisting of 20 turns, each with an area of 50 cm2, is positioned perpendicularly to a uniform magnetic fie
Scilla [17]

Answer:

Induced current, I = 0.5 A

Explanation:

It is given that,

number of turns, N = 20

Area of wire, A=50\ cm^2=0.005\ m^2

Initial magnetic field, B_i=2\ T

Final magnetic field, B_f=6\ T

Time taken, t = 2 s

Resistance of the coil, R = 0.4 ohms

We know that due to change in magnetic field and emf will be induced in the coil. Its formula is given by :

\epsilon=\dfrac{-d\phi}{dt}

Where

\phi=BA

\epsilon=\dfrac{-d(NBA)}{dt}

\epsilon=NA\dfrac{B_f-B_i}{t}

\epsilon=20\times 0.005\times \dfrac{6-2}{2}

\epsilon=0.2\ V

Let I is the induced current in the wire. It can be calculated using Ohm's law as :

\epsilon=I\times R

I=\dfrac{\epsilon}{R}

I=\dfrac{0.2}{0.4}

I = 0.5 A

So, the magnitude of the induced current in the coil is 0.5 A. Hence, this is the required solution.

5 0
3 years ago
A body undergoes SHM of amplitude 3cm and frequency 20Hz. What is the
Harrizon [31]

Answer:

0 m/s

Explanation:

Acceleration is a maximum at the lowest and highest positions.  The velocity is 0 at these positions.

7 0
4 years ago
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