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
zhuklara [117]
2 years ago
14

a scientist is creating a new synthetic material. the material’s density is 6.1 g/cm3. which sentences describe how the scientis

t can lower the material’s density?
Physics
2 answers:
icang [17]2 years ago
6 0
<span>A.) The scientist can decrease the mass while keeping the volume constant.
B.) The scientist can increase the mass while keeping the volume constant.
C.) The scientist can decrease the volume while keeping the mass constant.
D.) The scientist can increase the volume while keeping the mass constant.
</span>-Plato answer choices for this question 
Oksana_A [137]2 years ago
5 0

Answer:

A,D. Decrease of Mass, and increase of Volume.

:D Hope this helps. Stay amazing.

You might be interested in
_________ transport is when something passes thru the cell membrane without any input of energy.
Schach [20]
Passive is the correct answer
7 0
3 years ago
Read 2 more answers
A 1502.7 kg car is traveling at 33.1 m/s when
Bond [772]

By definition of average acceleration,

<em>a</em> = (20 m/s - 33.1 m/s) / (4.7 s) ≈ -2.78 m/s²

Vertically, the car is in equilibrium, so the net force is equal to the friction force in the direction opposite the car's motion:

∑ <em>F</em> = (1502.7 kg) (-2.78 m/s²) ≈ -4188.38 N ≈ -4200 N

If you just want the magnitude, drop the negative sign.

5 0
3 years ago
A 300 g ball and a 600 g ball are connected by a 40-cm-lon massless, rigid rod. The structure rotates about its center of me at
Readme [11.4K]

Answer:

 KE = 1.75 J

Explanation:

given,

mass of ball, m₁ = 300 g = 0.3 Kg

mass of ball 2, m₂ = 600 g = 0.6 Kg

length of the rod = 40 cm = 0.4 m

Angular speed = 100 rpm= 100\times \dfrac{2\pi}{60}

                         =10.47\ rad/s

now, finding the position of center of mass of the system

    r₁ + r₂ = 0.4 m.....(1)

 equating momentum about center of mass

  m₁r₁ = m₂ r₂

   0.3 x r₁ = 0.6 r₂

   r₁ = 2 r₂

Putting value in equation 1

2 r₂ + r₂ = 0.4

 r₂ = 0.4/3

 r₁ = 0.8/3

now, calculation of rotational energy

KE = \dfrac{1}{2}I_1\omega^2+\dfrac{1}{2}I_2\omega^2

KE = \dfrac{1}{2}\omega^2 (I_1 +I_2)

KE = \dfrac{1}{2}\omega^2 (m_1r_1^2 +m_2r^2_2)

KE = \dfrac{1}{2}\times 10.47^2(0.3\times (0.8/3)^2 +0.6\times (0.4/3)^2)

 KE = 1.75 J

the rotational kinetic energy is equal to 1.75 J

7 0
3 years ago
A table-tennis ball is thrown at a stationary bowling ball. The table-tennis ball makes a one-dimensional elastic collision and
Alecsey [184]

<u>Option b. </u>A smaller magnitude of momentum and more kinetic energy.

<h3>What is a momentum?</h3>
  • In Newtonian physics, an object's linear momentum, translational momentum, or simply momentum is defined as the product of its mass and velocity.
  • It has both a magnitude and a direction, making it a vector quantity. The object's momentum, p, is defined as: p=mv if m is the object's mass and v is its velocity (also a vector quantity).
  • The kilogram metre per second (kg m/s), or newton-second in the International System of Units (SI), is the unit used to measure momentum.
  • The rate of change of a body's momentum is equal to the net force exerted on it, according to Newton's second law of motion.

To know more about momentum, refer:

brainly.com/question/1042017

#SPJ4

7 0
1 year ago
The ratio of the speed of light in a medium to the speed of light in a vacuum
Liula [17]

Answer:D.Refractive Indez

Explanation:

It is usually expressed the other way: the ratio of the speed of light in a vacuum to the speed of light in a medium. In that case, it is called the "index of refraction".

7 0
3 years ago
Read 2 more answers
Other questions:
  • Chemical weathering is the breakdown of rocks by changing their color and size.
    6·2 answers
  • A teacher pushed a 98 newton desk across a floor for a distance of 5 meter he exerted a horizontal force of 20 newton for four s
    8·1 answer
  • The case whereby sound waves are heard at either a higher or lower pitch due to an object's motion is called:
    14·2 answers
  • How can sand dunes be saved?
    7·2 answers
  • While riding in a moving car, you toss an egg directly upward. Does the egg tend to land behind you, in front of you, or back in
    15·1 answer
  • A bicycle wheel has an initial angular velocity of 1.10 rad/s . Part A If its angular acceleration is constant and equal to 0.20
    11·1 answer
  • Which of the following are places that you can work out
    9·2 answers
  • You have a grindstone (a disk) that is 98.0 kg, has a 0.335-m radius, and is turning at 100 rpm, and you press a steel axe again
    5·1 answer
  • The batteries of some flashlights can be charged by turning a handle. Which energy transformation is happening in this process
    7·1 answer
  • Asymmetric dimethylarginine, endocan, pentraxin 3, serum amyloid A, soluble urokinase plasminogen activator receptor, total oxid
    7·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!