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3 years ago

A measurement must include both a number and a(n)

Physics

2 answers:

maw [93]3 years ago

3 0

A measurement must include both a number and an unit.

dimulka [17.4K]3 years ago

3 0

The correct answer to the question is Unit i.e a measurement must include both a number and a unit.

EXPLANATION:

During the measurement of any physical quantity, unit plays a crucial role.

The magnitude of a measurement contains two parts known as numerical part and a unit.

This can be understood by an example.

If we say that a body is travelling 5, it gives no idea. Similarly, if we say that the box was pulled to distance metre, it has also no sense.

But, if we say that the body was pulled to 5 metre, it gives an idea about the distance travelled by the body in a specific time interval.

Hence, the magnitude of a measurement is written as -

m = nu.

Here, n is the numerical part and u is the unit.

Read more about doppler shift here:

brainly.com/question/4052291

#SPJ1

7 0

2 years ago

The temperature of a plastic cube is monitored while the cube is pushed 3.4 m across a floor at constant speed by a horizontal f

Nesterboy [21]

Answer:

$\Delta E_{floor} = 51 J$

Explanation:

The work (W) done on the cube to be pushed across the floor is equal to the total thermal energy (ΔE) of the system:

$W = \Delta E_{T} = \Delta E_{cube} + \Delta E_{floor}$ (1)

Also, the work done on the cube by the horizontal force is giving by:

$W = F \cdot d$ (2)

where F: force applied to the cube , d: displacement of the cube

By equaling the equations (1) and (2), we can find the thermal energy of the floor:

$\Delta E_{cube} + \Delta E_{floor} = F \cdot d$

$\Delta E_{floor} = F \cdot d - \Delta E_{cube}$

$\Delta E_{floor} = 20 N \cdot 3.4 m - 17 J$

$\Delta E_{floor} = 51 J$

So, the increase in the thermal energy of the floor is 51 J.

Have a nice day!

7 0

3 years ago

RESUME EXAMPLE?? Comment what a resume must look like done

CaHeK987 [17]

Answer:

Explanation:

I don't understand your question

8 0

3 years ago

9. How is spring potential energy determined from a force versus position graph?

kolezko [41]

Answer: The potential energy associated with a mass attached to a spring depends on how much the spring is stretched or compressed. ... The gravitational force on the mass is −mg (“−” because the force points down). The force is the negative of the slope on the potential energy versus position graph.

Explanation:

8 0

3 years ago