Answer:
Direct current
Explanation:
The current that is supplied by electric cells and batteries.Electons flows in one direction and does not change directions.
what type of energy are the water molecules gaining during a phase change
Answer:
Potential energy.Explanation for yall who dont get:
Basically, the energy that is changing during a phase change is potential energy. Why? Cuz, during a phase change, the heat added (Potential Energy INCREASES) or released (Potential Energy DECREASES) allow the molecules to move apart or be together.
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Leme know if im wrong.
GL.
Describe the relationship between the materials and amount of thermal energy transfer?
Answer:If you mean how much heat it can transfer as a thermal mass - in order to move heat from one place to another:
Typically the relationships are given by specific heat capacity (at different temperatures) and latent heats, plus the end-point temperatures to determine which of these conversion factors are relevant.
If time comes into it, you are looking at including shape and thermal conductivity at the minimum, so you really would need to be more specific
Explanation:
A block of mass m is attached to ideal spring of constant k. When the spring is neither stretched nor compressed, block is at the
equilibrium position (x-0).
Assume the force between the mass and the spring obeys Hooke's Law: Fs-kx, where x is the displacement and Fs is the
restoring force. The restoring force is always directed toward the equilibrium position. In this example of vibrational motion, the
restoring force illustrates Newton's
A. first law of motion
B. 2nd law of motion
C. 3rd law of motion
D. law of gravitational attraction
Answer: Newton’s Third Law of Motion
Explanation:
USATestPrep❤️
What do you get when you subtract the force of air resistance from the force
of gravity?
Answer:
Net force
Explanation:
Answer: Net Force, The net force is a single force that replaces the effect of the original forces on the particle's motion. Your answer is Net Force.
A car travels at a speed of 55 km/hr and slows down to 10 km/hr in 20 seconds. What is the acceleration?
a) -2.25 km/h/s
b) 2.25 km/h/s
c) 3.5 km/h/s
d) -3.5 km/h/s
Answer:
b
Explanation:
what are the two types of covalent bonds ? provide a description of each
Answer: Polar and Nonpolar
Polar molecules occur when there is an electronegativity difference between the bonded atoms.
Nonpolar molecules occur when electrons are shared equal between atoms of a diatomic molecule or when polar bonds in a larger molecule cancel each other out
What does Kenyatta believe will be achieved with deeds and complete unity of people?
imperialism of other countries in Africa
freedom to earn equal pay for equal work
independence from European rule
more money to fight for independence
The correct answer is the Independence from Great Britain and to bring peace to his territory. Kenyatta believed that the Independence from Great Britain and to bring peace to his territory would be achieved with deeds and complete unity of people.
hope it helps
The correct answer is independence from the United Kingdom and peace in his territory. The correct option is B.
What does Kenyatta believe?Kenyatta believed that achieving independence from the United Kingdom and bringing peace to his territory would be accomplished through deeds and complete people unity.
Jomo Kenyatta (1894-1878) was an African politician and statesman who served as Kenya's Prime Minister and first President after the country gained independence from Great Britain in 1964.
In September 1946, he was elected President of the Kenya African Union. His slogan to unify the country was "Harambee" which means "join together or pulling together".
Kenyatta believed that achieving independence from the United Kingdom and bringing peace to his territory would be accomplished through deeds and complete people's unity.
To know more about Kenyatta believe follow
https://brainly.com/question/3218234
#SPJ6
In which of these can convection not occur?
gases
solids
liquids
fluids
Answer:
B: Solids
Explanation:
I have notes from EDG and I looked it up on the internet
I hope this helps
In the solids, convection can not occur. Convection can only be done in the fluids.
What is convection?Under the effect of gravity, hotter, less dense material rises while colder, denser stuff sinks, resulting in heat transfer"Convection is the ultimate mode of energy transmission to the surface"
There are three modes of the heat transfer;
1. Conduction
2. Convection
3. Radiation
Convection occurs in the fluid which is liquid and gases. Convection never occurs in the solid.
Hence option B is correct.
To learn more about the convection refer to the link;
https://brainly.com/question/16635311
A toy dart gun generates a dart with a momentum of 140 kg*m/s and a
velocity of 4 m/s. What is the mass of the dart?*
Answer:
35 kg
Explanation:
From the question,
Momentum (I) = mass (m) × velocity (v)
I = m×v................... Equation 1
Where m = mass, v = velocity
make m the subject of the equation
m = I/v.................... Equation 2
Given: I = 140 kgm/s, v = 4 m/s
Substitute these values into equation 2
m = 140/4
m = 35 kg
Hence the mass of the dart is 35 kg
Answer:
the answer is .035 kg.
Explanation:
You just divide the momentum by the velocity to get the mass. Hope this helps.
Two 31-m long parallel wires are 0.155 m apart. Each carries 168 A of current. What is the magnitude of the force between the wires? Please give your answer in Newtons.
Answer:
The magnitude of magnetic force between the two parallel wires is 1.13 N.
Explanation:
Given;
length of each wire, l = 31 m
distance between the two parallel wires, r = 0.155 m
current on each wire, I = 168 A
The magnitude of magnetic force between the two parallel wires is calculated as;
[tex]F = \frac{\mu _oI_1I_2 L}{2\pi r} \\\\F = \frac{(4\pi \times 10^{-7}) \times (168)^2 \times (31)}{2\pi \times 0.155} \\\\F = 1.13 \ N[/tex]
Therefore, the magnitude of magnetic force between the two parallel wires is 1.13 N.
A student pulls down with a force of 40 N on a rope that winds around a pulley of radius 5 cm. find the torque?
Answer:
2N
Explanation:
Given that a student pulls down with a force of 40 N on a rope that winds around a pulley of radius 5 cm. find the torque?
Solution
Using the formula
Torque = Force × radius
I.e
Torque = F r
Where
F = 40N
r = 5 cm = 5/100 = 0.05m
Substitute all the parameters into the formula
Torque = 40 × 0.05
Torque = 2 N
Therefore, the torque on this scenario is 2 N
I have to finish this by 6 am today please somebody help me
You step off of a ledge and land 0.5 seconds later. How high was the ledge?
1.25m
hope this is what you needed
La masa de un camión es de
45.000.000 gr, expresar las unidades
en Kilogramos y Toneladas.
Answer:
45000 kg and 45 tons
Explanation:
The expression in kilograms and tons is shown below;
As we know that
1 gr is 0.001 kg
So, 45000000 = 45,000 kg
And,
1 kg = 0.001 tons
So, 45000 kg = 45 tons
Therefore the same would be considered
THIS IS URGENT !!!
Four students recorded the time it took them to walk to school from their
homes as shown in the tabel below.
Motion of Four Students
Student
Which student had the greatest average speed?
Student 1
Student 2
Student 3
Student 4
I’LL MARK BRAINLIST!!!
What does ADA apply to?
Displacement vectors of 20m west and 8m east make a resultant vector that is (include the unit and direction) PLEASE ANSWER FAST
Answer:12m west
Explanation: subtract 20m from 8m and you get 12m west
PLEASE HELP! ASAP
During which process is radiation given off by isotopes with unstable atomic
nuclei?
A. Nuclear fusion
B. Chemical decay
C. Radioactive decay
D. Nuclear fission
Answer:
C. Radioactive decay
Explanation:
Answer:
Radioactive Decay
Explanation:
Ap3x
How does quantum theory explain the emission spectra of atoms
A. Electrons slowly gain energy in a continuous fashion
B. The movement of an electron between energy levels occurs gradually a small amount of energy are absorbed
C. Each motion of an electron between energy levels is associated with a single, specific amount of energy
D. Electrons absorb the energy they need to jump to a higher energy level from any light source above a minimum energy
Answer:
C
Explanation:
Each motion of an electron between energy levels is associated with a single, specific amount of energy
How many joules
of energy is needed
to run a 600 watt
power drill for
5 minutes?
Answer:
180KJ
Explanation:
power=Energy/time
power=600watts, time=5minutes=60*5=300 seconds
therefore;Energy=power*time= 600* 300
=180,000joules
OR
180Kilojoules
Determine the angle between the 12 and the 4 on the face of a clock in radians, degrees and revolution
Answer:
Angle - 120 degrees, 2.093 radians and 0.33 revolution
Explanation:
Minute hand is on the 12 and the hour hand is on the 4.
The angle formed between 4 and 12 is
[tex]\frac{4}{12} * 360 = 120[/tex] degrees
The angle formed between 4 and 12 in radian is
[tex]\frac{\pi }{180} * 120 = 2.093[/tex] radians
The angle formed between 4 and 12 in revolution is
[tex]\frac{2.093 }{2 \pi } \\= \frac{2.093 }{2* 3.14} \\= 0.33[/tex] revolution
If there is a 0.10 kg sample of the unknown metal alloy originally at 150℃, that is placed in 1.0 kg water at 20℃, and the final temperature rises to 23.5 ℃, what is the specific heat capacity?
Specific Heat of Water: 4180 J/kg ℃
Answer:
We now introduce two concepts useful in describing heat flow and temperature change. The heat capacity ( C ) of a body of matter is the quantity of heat ( q ) it absorbs or releases when it experiences a temperature change ( ΔT ) of 1 degree Celsius (or equivalently, 1 kelvin)
C=qΔT(12.3.1)
Heat capacity is determined by both the type and amount of substance that absorbs or releases heat. It is therefore an extensive property—its value is proportional to the amount of the substance.
For example, consider the heat capacities of two cast iron frying pans. The heat capacity of the large pan is five times greater than that of the small pan because, although both are made of the same material, the mass of the large pan is five times greater than the mass of the small pan. More mass means more atoms are present in the larger pan, so it takes more energy to make all of those atoms vibrate faster. The heat capacity of the small cast iron frying pan is found by observing that it takes 18,140 J of energy to raise the temperature of the pan by 50.0 °C
Explanation:
NEED HELP ASAP!!!!!!!!!!
Answer:
*The same balloon put into the freezer would be smaller and shriveled.
* The volume decreases as the temperature decreases.
* using a hypothetical starting volume of 2 liters in the balloon at 42 degrees Celsius, we can use the equation V1/T1 =V2/T2
V2= 1.54 liters which proves when temperature decreases , volume decreases as well.
Explanation:
The volume increases as the temperature increases, and volume decreases as the temperature decreases.
using a hypothetical starting volume of 2 liters in the balloon at 42 degrees Celsius, we can use the equation V1/T1 =V2/T2
Change Celsius to kelvin by adding 273.
2 liters/ 315 K = V2/243 K
Cross multiply and then divide by 315 to find V2
2 liters x 243 K / 315 K = V2
The Kelvin cancels itself out.
486 liters /315=V2
V2= 1.54 liters.
This proves that when the temperature decreases , so does the volume.
39
What is the name of the family of elements that is the second to the last column on the right
of the periodic table!
Through which of these media do sound waves travel the fastest?
A. rock
B. hot air
C. seawater
D. foam
Answer:
sound travel fastest through solids this is because molecules in a solid media much closer together then throws in a liquid or gas flowing sound ways to travel more quickly throw it in fact sound waves travel over 17 times faster throw Steel then through air
A: screwdriver
B: Hamer
D: Saw
C: Axe
Answer:
a: a screwdriver
Explanation:
Acceleration due to gravity is also called
O negative velocity
O displacement
O free-fall acceleration
O instantaneous velocity
The deeper you dive into the ocean and the higher the altitude you gain when climbing a mountain result in what?
Answer:
A change in pressure
Explanation:
This is because, the deeper you dive, the height of water above you creates a pressure on you. So, as the depth increases, the height of water increases, thus its weight on you, thus its pressure on you also.
Also, as you gain altitude as you climb a mountain, the height of air above you decreases. This thereby decreases the weight of air above you thus, decreasing the pressure of air on you.
So, in both cases, there is a change in pressure as height or depth changes. An increase in height results in decreased pressure and an increases in depth results in increased pressure.
Did I do this right??
Answer:
yes
Explanation:
good job
What is the SI unit of velocity?
O m
O m/s
O m/s2
O m*s2
Answer:
m/s
Explanation: