1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Aloiza [94]
3 years ago
12

Two pieces of amber are hung from threads. Piece A is charged by rubbing piece A with fur. Piece B is charged by rubbing piece B

with silk. Nylon is used to rub and charge a third piece of amber. Piece A and B are both repelled by the third piece of amber. This means:____.
Physics
1 answer:
PIT_PIT [208]3 years ago
6 0

Answer:

ieces A and B must also have the same type of charges

Explanation:

In electrostatics, charges of the same sign repel and charges of different signs attract.

If we apply this to our case, we have that part A and C repel each other, therefore they have the same type of charge.

Also part A and C repel each other, therefore they have the same type of charge.

If we use the transitive property of mathematics, pieces A and B must also have the same type of charges

You might be interested in
A dog barks in a park and hears its echo after 0.5 seconds. The sound of its bark got reflected by a nearby building. The sound
suter [353]

Answer:

the answer is 173 m/s

Explanation:

the the sound traveled from the dog to the building and back to the dog in 0.5 seconds, every second passes the sound travels 346 m/s but if half a second passes then we divide 346 by 2 and get 173 m/s.

5 0
3 years ago
Suppose a spring compresses by 5cm if you put a 250 gram weight on top of it. How
Leokris [45]

Answer:

Option D. 0.061 J

Explanation:

We'll begin by converting 5 cm to m. This can be obtained as follow:

100 cm = 1 m

Therefore,

5 cm = 5 cm × 1 m / 100 cm

5 cm = 0.05 m

Next, we shall convert 250 g to Kg. This can be obtained as follow:

1000 g = 1 Kg

Therefore,

250 g = 250 × 1 Kg / 1000

250 g = 0.25 Kg

Next, we shall determine the weight of the object. This can be obtained as follow:

Mass (m) = 0.25 Kg

Acceleration due to gravity (g) = 9.8 m/s²

Weight (W) =?

W = m × g

W = 0.25 × 9.8

W = 2.45 N

Next, we shall determine the spring constant. This can be obtained as follow:

Compression (e) = 0.05 m

Weight = Force (F) = 2.45 N

Spring constant (K) =?

F = Ke

2.45 = K × 0.05

Divide both side by 0.05

K = 2.45 / 0.05

K = 49 N/m

Finally, we shall determine the potential energy contained in the compressed spring. This can be obtained as follow:

Compression (e) = 0.05 m

Spring constant (K) = 49 N/m

Energy (E) =?

E = ½Ke²

E = ½ × 49 × (0.05)²

E = 24.5 × 0.0025

E = 0.061 J

Therefore, the potential energy contained in the compressed spring is 0.061 J

8 0
3 years ago
How do you calculate an<br> object's displacement?
andrezito [222]

Answer:

We can use equations of motion

s = ut +  \frac{1}{2} at {}^{2}

v {}^{2}  =  {u}^{2}  + 2as \:

3 0
3 years ago
Read 2 more answers
If the jet is moving at a speed of 1140 km/h at the lowest point of the loop, determine the minimum radius of the circle so that
AnnZ [28]

To solve this problem we will apply the concepts related to the centripetal Force and the Force given by weight and formulated in Newton's second law. Through the two expressions we can find the radius of curve made in the hand. To calculate the normal force, we will include the concepts of sum of forces to obtain the net force on the body at the top and bottom of the maneuver. The expression for centripetal force acting on the jet is

F_c = \frac{mv^2}{r}

According to Newton's second law, the net force acting on the jet is

F = ma

Here,

m = mass

a = acceleration

v = Velocity

r = Radius

PART A ) Equating the above two expression the equation for radius is

\frac{mv^2}{r} = ma

r = \frac{v^2}{a}

Replacing with our values we have that

r = \frac{(1140km/hr[\frac{1000m}{1km}\frac{1hour}{3600s}])^2}{7(9.8m/s^2)}

r = 1.462*10^3m

PART B )

<u>- The expression for effective weight of the pilot at the bottom of the circle is</u>

N = mg +\frac{mv^2}{r}

N = (69kg)(9.8m/s^2)+\frac{(69)(1140km/hr[\frac{1000m}{1km}\frac{1hour}{3600s}])^2}{1.462*10^3m}

N = 5408.87N

<em>Note that the normal reaction N is directed upwards and gravitational force mg is directed downwards. At the bottom of the circle, the centripetal force is directed upwards. So the centripetal force is obtained from the gravitational force and the normal reaction. </em>

<u>- The expression for effective weight of the pilot at the top of the circle is</u>

N = mg -\frac{mv^2}{r}

N = (69kg)(9.8m/s^2)-\frac{(69)(1140km/hr[\frac{1000m}{1km}\frac{1hour}{3600s}])^2}{1.462*10^3m}

N = 4056.47N

<em>Note that at the top of the circle the centripetal force is directed downwards. So the centripetal force is obtained from normal reaction and the gravitational force. </em>

4 0
3 years ago
The kinetic energy of a baseball is doubled by changing the speed of the baseball. By what factor has its speed changed? √ 2 v i
leonid [27]

Answer:

1/√2

Explanation:

Kinetic energy of a body is expressed as

KE = 1/2mv²

If it's KE is doubled

2KE = 1/2mv1² where v1 is the new speed when the kinetic energy is doubled

To know the value of the amount the velocity has changed, we will divide both equations

2KE/KE = (1/2mv²)/(1/2mv1²)

2 = v²/v1²

(v/v1)² = 2

v/v1 = √2

v1 = v/√2

v1 = 1/√2 × v

The new velocity has changed by

1/√2vinitial

7 0
3 years ago
Other questions:
  • The symbols for elements have either
    5·1 answer
  • What is the net charge on a sphere that has the following? a) 5.29 x 10^6 electrons and 7.07 x 10^6 protons
    15·1 answer
  • A person drives 4 miles to the mall. If the speed limit is 45 miles/hr and the person
    5·1 answer
  • Coal is considered to be a non-renewable energy source. Which of the following statements is correct? a. Coal is a scarce resour
    14·1 answer
  • Name two noble gases
    14·2 answers
  • The speed of sound is 343 m/s in air at room temperature. What is the wavelength of a B-flat musical note that has a frequency o
    11·1 answer
  • (PLEASE HELP1!1!1!1!1!1!1!1!1!1)
    12·1 answer
  • You weight is result of the gravitational force of earth on your body what is the cor responding reaction force
    10·1 answer
  • The Nile river excellent for. what
    11·2 answers
  • Dawn is trying to find out how much weight she can push across the room. She is really trying to find her
    11·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!