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
ziro4ka [17]
3 years ago
10

A car has a momentum of 20,000 kg • m/s. What would the car’s momentum be if its velocity doubles?

Physics
2 answers:
AnnyKZ [126]3 years ago
6 0

To answer this question, it helps enormously if you know
the formula for momentum:

           Momentum = (mass) x (speed) .

Looking at the formula, you can see that momentum is directly
proportional to speed.  So if speed doubles, so does momentum.

If the car's momentum is 20,000 kg-m/s now, then after its speed
doubles, its momentum has also doubled, to 40,000 kg-m/s.

Butoxors [25]3 years ago
4 0

A car has a momentum of 20,000 kg • m/s. What would the car’s momentum be if its velocity doubles? the answer is 40,000kg'm/s you welcome have a good day?!!

You might be interested in
a wave in a rope is traveling at 6 m/s and at a frequency of 2 Hz. what is the wavelength of the wave producced
Tems11 [23]

Answer:

3

Explanation:

4 0
3 years ago
Calculate the potential difference across a 25-Ohm. resistor if a 0.3-A current is flowing through it.
nikdorinn [45]

Answer:7.5V

Explanation:

Ohm's law, V=IR

so, V=0.3×25

V=7.5V

4 0
3 years ago
Read 2 more answers
When objects exchange charge, why do we say it's the negative charge that moves and not the positive?
Novay_Z [31]

Answer:

It is said that the negative charge moves because the electrons in the atoms of any object are taken or given to the atoms of another object.

Explanation:

The atom is made up of protons, electrons and neutrons. The number of protons is exactly the same to the number of electrons for a certain element. For example, hydrogen: it has a proton, and therefore, an electron.

The electron has a negative charge. The proton has a positive charge. And the neutron has no charge, so it is neutral. While the atom has the same number of protons and electrons, it will not be electrically charged.

An example of how a charge exchange occurs between two objects is through the case of rubbing. This makes the atoms of the two objects close enough that there is an electron transfer, causing any of the objects to gain or lose electrons as a consequence of each other interaction. In the case of transferring electrons, the atom will have a greater number of protons, so it will be positively charged. When the atom receive electrons, it will have a greater number of electrons, so it will be negatively charged.

Therefore, since it is the electrons that move from one atom to another, then it is the negative charge that moves (<em>characterized by the electrons</em>) and not the positive charge (<em>characterized by the protons</em>).

6 0
3 years ago
Black widow (m=57000 g) shovels snow, holding the shovel at a 40 degree angle above the ground. If she uses a constant force of
Dima020 [189]

Answer:

She does a work of 689.44 J in the snow.

Explanation:

A force is said to do work when it alters the state of motion of a body. The work of the force on that body will be equivalent to the energy needed to move it.

In other words, Work is a form of energy transmission between bodies. In order to carry out work, a force must be exerted on a body and it must move.

The work is equal to the product of the force times the distance and the cosine of the angle that exists between the direction of the force and the direction that the moving point or object travels:

W= F*d* cos Ф

Work W is measured in joules (J), force is measured in newtons (N), and displacement in meters (m).

In this case:

  • F= 180 N
  • d=5 m
  • Ф= 40 degrees

Replacing:

W= 180 N*5 m* cos 40

Solving:

W= 689.44 J

<u><em>She does a work of 689.44 J in the snow.</em></u>

7 0
3 years ago
Help me out on this? Grades due in a couple days and I need to get everything done on time-​
amm1812

Answer:

75mL

...............

7 0
3 years ago
Read 2 more answers
Other questions:
  • Why is there a universe at all
    10·1 answer
  • An object has a kinetic energy of 268 j and a momentum of magnitude 22.4 kg·m/s. find the speed and the mass of the object.
    14·1 answer
  • Why is winter clothing generally darker in color than summer clothing?
    6·1 answer
  • A car skids to a stop. What happens to its kinetic energy?
    9·1 answer
  • The people in a location in Florida mainly grow crops which need a lot of water. Which of these statements about the location be
    15·2 answers
  • Corn plants and milkweed plants grow in the same area. Over several years, the milkweed plants have taken over the field and the
    12·2 answers
  • HELLO ONCE MORE FRIENDS . PLEASE HELP ME.
    5·2 answers
  • Write a hypothesis about the use of an object’s physical characteristics to determine its density. Use the format "if . . . then
    14·1 answer
  • A machine raised a load of 360N through a distance of 0.2m. The effort, a force of 50N moved 1.8m during the process. Calculate
    7·1 answer
  • Changes of state
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!