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Natasha2012 [34]
4 years ago
13

Different masses are hung on a spring scale calibrated in newtons. The force exerted by gravity on 1.0 kg is shown in the image

below in newtons. What would be the force exerted by gravity on 9.0 kg?
a. 9.0n
b.9.8n
c. 81n
d.88 n
Physics
1 answer:
nekit [7.7K]4 years ago
5 0

d.88 n

Explanation:

The force exerted by gravity on the mass is 88N;

Gravitational force is usually experienced by two bodies with masses.

This force causes all objects on earth to accelerate at 9.8m/s².

    Force of gravity = mass x acceleration due to gravity

In this case, the force exerted on the object by gravity will be the weight of the object.

Weight is a force applied gravity on a body:

   Weight of the masses = Force of gravity = mass x acceleration

   Given mass = 9kg

             Force of gravity = 9 x 9.8 = 88.2N approximately 88N

learn more:

Weight and mass brainly.com/question/5956881

#learnwithBrainly

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Two resistors with values of 6.0 ohms and 12 ohms are connected in parallel. This combination is connected in series with a 2.0
ivanzaharov [21]

Answer:

4A

Explanation:

According to ohm's law;

E = IRt where;

E is the source voltage = 24volts

I is the total current flowing in the circuit = ?

Rt is the total effective resistance in the circuit.

To find Rt, we will resolve the resistors in parallel first.

Since 6ohms and 12ohms resistors are in parallel, their effective resistance will give;

1/R = 1/6+1/12

1/R= 2+1/12

1/R = 3/12

3R = 12

R = 4ohms.

This resistor will now be in series with the 2.0ohms resistor to finally have;

Rt = 4+2

Rt = 6ohms

From the ohms law formula;

I = E/Rt

I = 24/6

I = 4Amperes

The total current in the circuit is 4A

This same currents will flow in the 2ohms resistor since same current flows in a series connected resistors.

3 0
4 years ago
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Would you hear an echo if you shouted in your bedroom? Explain your answer.
Sindrei [870]

Answer:

if your bedroom is empty yes but if not most likely no

Explanation:

Why Cannot we hear an echo in a small room?

They can't hear an echo in small room because in it the sound can't be reflected back. For an echo of a sound to be heard,the minimum distance between the source of sound and the walls of the room should be 17.2 m.Obviously,in a small room echoes cannot be heard.

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4 years ago
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A rope is vibrating in such a manner that three equal-length segments are found to be vibrating up and down with 321 complete cy
kolbaska11 [484]

Answer:

<u>2.48 m</u> is the length of the rope.

Explanation:

Cycle period is 321

Time is 20 second

Wave travels at speeds = 26.4 m/s

We know that,

\text { Frequency }=\frac{1}{T} \text { (For one cycle) }

Frequency required for 321 complete cycle in 20 seconds is

\text { Frequency }(f)=\frac{321}{20}

Frequency = 16.05 hz

We know that,

\text { Wavelength }=\frac{\text { wave velocity }}{\text { frequency }}

\lambda=\frac{v}{f}

λ = wavelength, the distance between "wave crests" (m)

v = wave velocity, the "speed" that waves are moving in a direction (m/s)

f = frequency, (cycles/ or Hz)

\lambda=\frac{26,4}{16.05}

λ = 1.65 m

As per given question "length of the rope has three equal length segment"

\mathrm{Length of the rope}=\frac{3}{2} \lambda

\mathrm{Length of the rope }=\frac{3}{2} \times 1.65

\mathrm{Length of the rope}=1.5 \times 1.65

Length of the rope = 2.48 m

Therefore, length of the rope is <u>2.48 m.</u>

7 0
3 years ago
two objects each weighing 2kg are lifted through the same distance in 4s and 1s respectively. which scenario requires more work?
Shalnov [3]

i believe it would be the same because time doesn't matter when calculating total work done.

Work=FxD

F=force

D=distance


7 0
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maria [59]

The initial speed doesn’t matter.  To reach the maximum height, you need to launch straight up ... 90 degrees above horizontal.

6 0
3 years ago
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