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
luda_lava [24]
3 years ago
12

7. The energy source used to produce most of the electrical energy in the United States is ____________________.

Physics
2 answers:
Tamiku [17]3 years ago
5 0

Answer:

Most of the US electric energy is produced with the help of coal, natural gas and nuclear energy.

Explanation:

The blades of the turbine which are connected to the electric generator are moved with the help of energy sources.

The heat which is produced with the help of coal, natural gas and the nuclear energy will help in producing steam and this steam will move the blades of turbines and by this phenomena the electrical energy is produced.

The above mentioned sources such as coal, natural gas and the nuclear energy are mostly used in US to produce electric energy.

Fudgin [204]3 years ago
4 0

Fossil fuels like coal, natural gas and oil.

Hopes this helps!

You might be interested in
A solid cylinder is released from the top of an inclined plane of height 0.81 m. From what height, in meters, on the incline sho
Jlenok [28]

Answer:

same 0.81m

Explanation:

in this problem if we assume there no resistance of any sort. and we apply the energy conservation

change in Potential energy = change in kinetic energy

mgh = 0.5mv^2

gh = 0.5v^2

the above relation suggests that the speed at the bottom is only depending on the height it is released from not on the shape, mass or radius.

so at the bottom

put h = 0.81m

9.81 * 0.81 * 2 = v^2

v=3.99 m/s

both CYLINDER and SPHERE will have same velocity at the bottom if released from the same height irrespective of shape and size

3 0
3 years ago
Light travels _______ in a material with a higher index of refraction
exis [7]
Light will travel more slowly in a material with a higher index of refraction 
4 0
3 years ago
Read 2 more answers
Gravitational energy can be negative?
AlladinOne [14]

answer:

yes

explanation:

At a separation of the surface of Earth (r=6400km) gravity wants pull the test mass closer and closer. ... So the work done by gravity is NEGATIVE. The gravitational potential energy is negative because us trying to do the opposite of what gravity wants needs positive energy.

6 0
3 years ago
A car is pushed with a force of 450 N for 19.4 seconds. What impulse was applied to the car?​
harina [27]

Answer:

impulse = 8820 kg·\frac{m}{s} or 8820 N·s

Explanation:

Impulse J is equal to the average force F_{av} multiplied by the elapsed time Δt or in equation form, J = F_{av}Δt

As long as your force of 450 N is constant then that value is your average force F_{av} and your elapsed time is 19.4 seconds.

Multiply these values.

You will get an impulse of 8820 kg·\frac{m}{s} or 8820 N·s.

6 0
2 years ago
Now the elevator is moving downward with a velocity of v = -2.8 m/s but accelerating upward with an acceleration of a = 5.5 m/s2
borishaifa [10]

Answer:

160.75 N

Explanation:

The downward velocity has no effect on the force situation, it is only changes in velocity (plus, of course, gravity, which is always there) that require a force. At constant velocity, the bottom spring s_3 is supporting its mass m_3 to balance gravity.

As the elevator slows, though, it also ends up slowing down the spring arrangement, too. However, because the stretching takes time, it means that some damped harmonic motion will be set up in the spring chain.

When the motion has finally damped out, the net force the bottom spring s3 exerts on m3 has two components--that of gravity and of the deceleration of the elevator:

F_3net = m3 * (g + a) = 10.5×(9.81+5.5)= 10.5×15.31= 160.75 N

5 0
3 years ago
Other questions:
  • What is the mass of 1 l of water? what is its weight in newtons?
    13·1 answer
  • The part of the mantle called the ___ is made out of soft rock that bends like plastic
    12·1 answer
  • A submarine dives to a depth of 100-m beneath the surface of the Pacific Ocean. The density of sea water is 1030 kg/m3. The subm
    13·1 answer
  • Help needed. The mass of an object times its velocity is the blank of the object ?
    14·2 answers
  • Suppose that there are N=108 two-state systems, each with energy difference E=6 × 10-21 J between the two states. The environmen
    12·1 answer
  • The current that charges a capacitor transfers energy that is stored in the capacitor’s electric field. Consider a 2.0 μF capaci
    11·1 answer
  • A 3.00-kg ball swings rapidly in a complete vertical circle of radius 2.00 m by a light string that is fixed at one end. The bal
    11·1 answer
  • How far will a arrow fly is shot horizontally from a cliff that is 7m high and with a speed of 30?
    10·1 answer
  • On the periodic table , the vertical columns that extend down the periodic table are called ?
    14·1 answer
  • A truck with a mass of 1360 kg and moving with a speed of 16.5 m/s rear-ends a 805 kg car stopped at an intersection. The collis
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!