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sukhopar [10]
3 years ago
12

Identify the row that contains two scalars and one vector quantity: Distance Acceleration Velocity Speed Mass Acceleration Dista

nce Weight Force Speed Weight Acceleration Velocity Force Mass
Physics
1 answer:
GenaCL600 [577]3 years ago
8 0

Answer:

Speed, mass and acceleration

Explanation:

A scalar quantity is a quantity that has only magnitude but no direction while a vector quantity has both magnitude and direction.

According to the question, the row that has two scalars and one vector is speed, mass and acceleration.

The two scalars in this row are speed and mass while the vector quantity there is the acceleration.

Acceleration has direction since it possess direction. A body accelerating will do so in a particular direction. Speed and mass doesn't possess any direction. Mass only specify the magnitude of the body but no clue as to which direction is the body moving towards.

Speed also only specify the

total distance covered with respect to time but not the direction of the direction.

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A potential difference of 53 mV is developed across the ends of a 12.0-cm-longwire as it moves through a 0.27 T uniform magnetic
Klio2033 [76]

Answer:

The angle between the magnetic field and the wire’s velocity is 19.08 degrees.                                            

Explanation:

Given that,

Potential difference, V = 53 mV

Length of the wire, l = 12 cm = 0.12 m

Magnetic field, B = 0.27 T

Speed of the wire, v = 5 m/s

Due to its motion, an emf is induced in the wire. It is given by :

\epsilon=Blv\sin\theta

Here,

\theta is the angle between magnetic field and the wire’s velocity

\sin\theta=\dfrac{\epsilon}{Blv}\\\\\sin\theta=\dfrac{53\times 10^{-3}}{0.27\times 0.12\times 5}\\\\\sin\theta=0.327\\\\\theta=19.08^{\circ}

So, the angle between the magnetic field and the wire’s velocity is 19.08 degrees.

8 0
3 years ago
A potter's wheel is rotating around a vertical axis through its center at a frequency of 2.0 rev/s. The wheel can be considered
mart [117]

Answer:

\omega_f=12.2954 \,rad.s^{-1}         i.e.

Frequency=1.9569\,rev.s^{-1}

Explanation:

Given:

angular speed,\omega_i =2\times 2\pi \,rad.s^{-1}

mass of the disk, M=4.9\,kg

radius of the disk, R=0.2\,m

mass of the chunk, m=2.7\,kg

radius of the chunk, r=0.04\,m

We know that the angular momentum is given by:

L=I.\omega

and moment of inertia for a disc:

I=\frac{1}{2} m.r^2

According to the conservation of angular momentum, the final angular momentum is equal to the initial angular momentum.

\frac{1}{2} \times M.R^2\times \omega= \frac{1}{2} \times (M.R^2+m.r^2) \omega_f

4.9\times 0.2^2\times (2\times 2\pi)=(4.9\times 0.2^2+2.7\times 0.04^2 )\tiems \omega_f

\omega_f=12.2954 \,rad.s^{-1}

Frequency=1.9569\,rev.s^{-1}

4 0
4 years ago
Which of the following is a measurement of velocity?
Westkost [7]

Answer:

B) 55 m/h south

Explanation:

Velocity is the rate of displacement per unit of time.

It is mathematically expressed as:

   Velocity  = \frac{displacement}{time}  

Displacement is the distance covered by a body in a specific direction.

Velocity is different from speed in that it specifies the direction of a body as it travels.

Therefore, we say, velocity is a scalar quantity.

When we are giving velocity values, the unit is expressed with the direction also delineated.

From the given choices, the unit with the south direction and meter per hour is obviously correct.

5 0
3 years ago
In a rigid container, when the speed of the gas molecules decreases, the pressure of the gas also decreases.
Paraphin [41]
True please mark brainly 
8 0
4 years ago
This mathematical model describes the changes that occur in a sample of
Veseljchak [2.6K]

Answer:

the correct answer is B

Explanation:

The kinetic model of the movement describes that the movement of the molecules increases with the increase of their internal energy, which in a macroscopic sample is reflected in an increase in the temperature of the sample.

The sample graph shows the function of temperature over time, which is why our kinetic model establishes that there is an increase in the movement of water molecules.

Consequently the correct answer is B

8 0
3 years ago
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