All categories

3 years ago

Provide three statements that demonstrate the importance of units when describing motion

1 answer:

5 0

1.uniti m/s indicate it is in SI unit
2.It gives the distance covered by the object in unit time
3.Unit indicates that it velocity not other unit
4.In a problem if other units are other than SI unit you can convert it
5.For comparison purpose you should know the unit unless you can't or it may be wrong
i think so

You might be interested in

A 75 A resistor in a circuit has a current flowing through it of 2.0 A. What is

Reptile [31]

Answer:

The power dissipated by the resistor can be calculated as $P = I^{2} R$ .

Explanation:

Joules heating law states that any conductor passed with the electric current produces heating effect which is the electric power loss.

The given circuit has, $R = 75 ohm$ resistor (the unit is wrong i question because resistor's unit is ohm not Ampere).
Current flowing through the circuit is $I = 2.0 A$ .

By using joules heating theory, $P = I^{2} R$ ,

$or,$ $P = 2^{2} * 75$

$or,$ $P= 4*75$

$or$ , $P= 300 W$ .

So the power dissipated by the resistor in the circuit is 300 W.

7 0

3 years ago

Ple can someone help me to answer this question

ra1l [238]

The length of the uniform meter stick is 50 cm and the mass of the uniform meter stick is 50 g.

<h3 /><h3>A sketch of the uniform stick and the mass</h3>

The sketch of the uniform stick and the mass will be two based on the given statement.

<h3>when the uniform stick balances on knife at 10 cm from one end;</h3>

-------------------------------------------------------

↓ 10cm Δ (L - 10 cm) ↓

200g M

<h3>When the knife edge is moved 5 cm further</h3>

|---------------15 cm-----------------|

-----------------------------------------------------------------------

↓ 8.75 cm Δ (L - 15 cm) ↓

200g M

From the first diagram, apply principle of moment;

200(10) = M(L - 10) ------- (1)

From the second diagram, apply principle of moment;

200(8.75) = M(L - 15) ------- (2)

From equation (1); M = (2000) / (L - 10)

From equation (2); M = (1750) / (L - 15)

Solve (1) and (2);

(2000) / (L - 10) = (1750) / (L - 15)

1750(L - 10) = 2000(L - 15)

L - 10 = 2000/1750(L - 15)

L - 10 = 1.143(L - 15)

L - 10 = 1.143L - 17.14

17.14 - 10 = 1.143L - L

7.14 = 0.143L

L = 7.14/0.143

L = 50 cm

<h3>Mass of the uniform stick</h3>

M = (2000) / (50 - 10)

M = 50 g

Thus, the length of the uniform meter stick is 50 cm and the mass of the uniform meter stick is 50 g.

Learn more about length of meter stick here: brainly.com/question/17225736

#SPJ1

8 0

2 years ago

When you have a pot of water on the stove, heat is transferred to the water. Describe the behavior of the water molecules and ho

Digiron [165]

The hotter molecules become, the faster they move around. The colder they are, the more slow and lethargic they are

3 0

3 years ago

A 1000-n weight is hanging from a 2.0 m long aluminum rod. A 500-n weight is hanging from a 1.0 m long aluminum rod. The two alu

Hunter-Best [27]

Answer:

Both rod have the same tensile stress

Explanation:

Given information,

The weight first rod, $W_{1}$ = 1000 N

The length of first rod, $l_{1}$ = 2.0 m

The weight second rod, $W_{2}$ = 500 N

The length of second rod, $l_{2$ = 1.0 m

The equation of tensile stress, σ = $\frac{F}{A}$

where

σ = tensile stress (N/ $m^{2}$ or Pa)

F = Force (N)

A = Area (N/ $m^{2}$ or Pa)

σ1 = $\frac{W_{1} }{A_{1} }$ , A = 2πl

= $\frac{1000}{2\pi(2) }$

= $\frac{250}{\pi }$ N/ $m^{2}$

now calculate σ2

σ2 = $\frac{W_{2} }{A_{2} }$

= $\frac{500}{2\pi(1) }$

= $\frac{250}{\pi }$ N/ $m^{2}$

σ1/σ2 = $\frac{250}{\pi }$ / $\frac{250}{\pi }$

σ1/σ2 = 1

σ1 = σ2

Hence, the tensile stress of first and second rod are the same.

5 0

4 years ago

Why should we convert units within the metric system

irga5000 [103]

It is often necessary to convert one metric measurement to another unit—this happens frequently in the medical, scientific, and technical fields, where the metric system is commonly used.

7 0

4 years ago