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Tems11 [23]
3 years ago
13

Two people travel from Columbus to Cleveland, one by car at an average velocity of 90km/h, and one by plane at an average veloci

ty of 300km/h. Can their displacements be equal
Physics
1 answer:
Flura [38]3 years ago
7 0

Answer:

Explanation:

Yes , their displacement may be equal .

Suppose the displacement is AB where A is starting point and B is end point .

The car is covering the distance AB by going from A to B on straight line . On the other hand plane goes from A to C , then from C to D and then from D to B . In this way plane reaches B from A on a different path which is longer than path of the car . In the second case also displacement of plane is AB . In the second case distance covered is longer but displacement is same that is AB .

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If you have a density of 100 kg/L, and a mass of 1000 units, tell me the following: First what are the mass units?
Troyanec [42]

Answer:

<em> The mas unit is the the 'Kilogram' written as 'kg'</em>

<em>Volume is 10 L</em>

<em></em>

Explanation:

The complete question is

If you have a density of 100 kg/L, and a mass of 1000 units, tell me the following: First, what are the mass units?

Second, what is the volume

mass units is the 'Kilogram', written as 'kg'

density = mass/volume = 100 kg/L

the mass  = 1000 kg

volume = mass/density = 1000/100 =<em> 10 L</em>

7 0
3 years ago
(02.03 LC)
guapka [62]

Ina vacuum, it is a constant value that does not depend on the observer.

8 0
3 years ago
Read 2 more answers
A rolling ball has 8 joules of kinetic energy and is rolling 4m/s. Find it’s mass
Maru [420]

Answer:

m = 1

Explanation:

K.E = 8J

v = 4m/s

m = ?

Now,

K.E = 1÷2mv^2

8 = 1÷2 × m × (4)^2

8 = 1÷2 × m × 16

8 = m × 8

m × 8 = 8

m = 8 ÷ 8 = 1

m = 1

<h3><em><u>VERIFICATION</u></em><em><u>:</u></em></h3>

K.E. = 1÷2mv^2

K.E = 1÷2 × 1 × 4^2

K.E. = 8J

<u>-TheUnknownScientist</u>

4 0
3 years ago
The range of human hearing is roughly from twenty hertz to twentykilohertz. Based on these limits and a value of 305 m/s for the
AnnyKZ [126]

Answer:

1.L_s=0.0076\ m

2.L_l=7.62\ m

Explanation:

Given that

f₁= 20 Hz

f₂= 20 KHz

C= 305 m/s

For open pie organ :

L=\dfrac{C}{2f}

<u>Shortest length :</u><u> </u>

L_s=\dfrac{C}{2f_2}

L_s=\dfrac{305}{2\times 20000}

L_s=0.0076\ m

<u>Longest length : </u>

L_l=\dfrac{C}{2f_1}

L_l=\dfrac{305}{2\times 20}

L_l=7.62\ m

7 0
3 years ago
A volleyball is knocked from rest to a velocity of 22 m/s over a time of 0.2
notsponge [240]

Answer:

\boxed {\boxed {\sf 55 \ Newtons}}

Explanation:

We are asked to find the force applied to the volleyball. According to Newton's Second Law of Motion, force is the product of mass and acceleration.

F=ma

We are given the mass, but we must calculate the acceleration.

1. Acceleration

Acceleration is the rate of change of velocity with respect to change. It is the change in velocity over the time.

a= \frac{v_f-v_i}{t}

The volleyball starts at rest or 0 meters per second and reaches a velocity of 22 meters per second in 0.2 seconds.

  • v_f= 22 m/s
  • v_i= 0 m/s
  • t= 0.2 s

Substitute the values into the formula.

a= \frac{ 22 \ m/s - 0 \ m/s}{0.2 \ s}

Solve the numerator.

a= \frac{22 \ m/s}{0.2 \ s}

Divide.

a= 110 \ m/s^2

2. Force

Now we know the mass and acceleration, so we can calculate the force.

F=ma

The mass is 0.5 kilograms and the acceleration is 110 meters per second squared.

  • m= 0.5 kg
  • a=110 m/s²

Substitute the values into the formula.

F= 0.5 \ kg * 110 \ m/s^2

Multiply.

F= 55 kg*m/s^2

1 kilogram meter per second squared is equal to 1 Newton, so our answer of 55 kg*m/s² is equal to 55 Newtons.

F= 55 \ N

<u>55 Newtons</u> of force are applied to the volleyball.

3 0
3 years ago
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