Explanation:
these are quantities that have magnitude but no direction
Examples include : speed, mass, volume, density, everything, time
How much gravitational potential energy does an object have if it is located 20 m above the point that we define as O height and has a mass of 10 kg
Answer:
Explanation:
PE = mgh where m is the mass in kg, g is the pull of gravity which is 9.8, and h is the height of the object above the point to which it could possibly fall, measured in meters. Plugging in:
PE = 10(9.8)(20) so
PE = 1960 J
This should be rounded to 1 sig fig according to the rules of sig fig and your numbers here, but I imagine you're not following them all that much. It should be 2000 J
A test car and its driver, with a combined mass of 600 kg, are moving along a straight,horizontal track when a malfunction causes the tires to stop rotating. The car skids to a halt with constant acceleration, leaving skid marks on the road during the whole time it skids. Which two of the following measurements, taken together, would allow engineers to find the total mechanical energy dissipated during the skid?
A. The length of the skid marks
B. The contact area of each tire with the track.
C. The coefficent of static frction between the tires and the track.
D. The coefficent of static frction between the tires and the track.
Answer:
The two of the following measurements, when taken together, would allow engineers to find the total mechanical energy dissipated during the skid
B. The contact area of each tire with the track.
C. The co-efficent of static friction between the tires and the track.
D. The co-efficent of static friction between the tires and the track.
Explanation:
A ball hits a wall. What is true about the magnitude of the force experienced by the ball compared with the force experienced by the wall?
A. The ball experiences more force than the wall.
B. The ball experiences less force than the wall.
The ball and the wall experience the same force.
D. The ball experiences half the force of the wall.
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Answer:
The ball and the wall experience the same force.
Explanation:
According to the third law of Newton, which states that "for every action, there is an equal and opposite reaction", this means that when an object 1 acts on object 2 with a certain force, object 2 also acts on object 1 with the same magnitude of force but in an opposite direction.
According to this question, a ball hits a wall with a certain force. This means that the wall will react on the ball with the same force magnitude, but in an opposite manner. Hence, the ball and the wall experience the same force.
Select all of the statements that are true about the rubber ball.
If the ball is cold, its particles tend to have a small amount of kinetic energy
The particles that make up the ball are moving even when the ball is not.
The temperature of the ball depends on the kinetic energies of the particles that make up the ball.
✔️If the ball is cold, its particles tend to have a smallamount of kinetic energy.
When a substance is hot its particles generally have a large amount of kinetic energy when a substance is cold it's particles do not move as much that means the particles tend to have less kinetic energy.✔️The particles that make up the ball are moving even when the ball is not.
Like all matter the ball is made up of particles that are constay moving even ig the ball is sitting still the particles that make up the ball are still moving.✔️The temperature of the ball depends on the kinetic energies of the particles that make up the
ball.
A substance temperature is a measure of the kinetic energies of the substance's particles so the ball's temperature depends of the particles that make up the ball.#CarryOnLearning!
answer||||||||||||||||||||||||||||||||
lcompute the increase in length of 500 m of copper wire when it's temperature changes from 12 degrees celsius to 32 degrees Celsius the linear expansivity of copper wire is 17 * 10 raise to power - 6 per zero degree celcius
Explanation:
step by step explanation
please helppppppp ASAP. thank u
Answer:
-9.8
Explanation:
gravity gives constant acceleration,negative for going upwards
A potential difference of 15 V produces a current of 0.60 amps in a piece of copper wire. What is the resistance of the wire?
9.0 Ω
18.0 Ω
25 Ω
Answer:
R = 25 Ohms
Explanation:
Given the following data;
Voltage (p.d) = 15 V
Current = 0.6 A
To find the resistance of the wire;
Ohm's law states that at constant temperature, the current flowing in an electrical circuit is directly proportional to the voltage applied across the two points and inversely proportional to the resistance in the electrical circuit.
Mathematically, Ohm's law is given by the formula;
[tex] V = IR[/tex]
Where;
V represents voltage measured in voltage.
I represents current measured in amperes.
R represents resistance measured in ohms.
[tex] R = \frac {V}{I} [/tex]
Substituting into the equation, we have;
[tex] R = \frac {15}{0.6} [/tex]
R = 25 Ohms
Let's say you cut open a log of wood with an axe, what type of simple machine are you using? Does it matter how sharp it is?
yes it matters because if it's not sharp it would take all day
Answer:
an axe is a type of machine called a wedge. it does matter how sharp your axe is. if your axe is not sharp then you will have a harder time cutting wood.
Explanation:
What happens to pressure when the area of the surface increases ? *
Pressure will decrease whenever the surface area increases, and when the weight of the object is reduced.
[tex] \color{green} {\huge \circ \degree \degree} \boxed{\normalsize{ \mathrm{ \underline{ \color{red}pressure \: \: will \: \: decrease}}} } \: \: \huge \color{green}\degree \degree \circ[/tex]
Explanation :We know that,
[tex]\large \boxed{ \mathrm{pressure = \frac{mass}{area \: \: of \: \: surface}} }[/tex]
Now, we can observe that the area of surface is inversely proportional to the pressure, Therefore pressure will change opposite to the change in surface area in contact.
So, if we increase the surface area then there would be decrease in magnitude of pressure.
[tex] \large { \mathfrak{hope \: \:i t \: \: helps \: \: you..... }}[/tex]
what is the pressure exerted, what is the pressure exerted by 50kg girl as she places her weight on one shoe if the heels area is 0.002m²
Answer:
The pressure exerted by the girl is 245,000 N/m²
Explanation:
Given;
mass of the girl, m = 50 kg
area of the girl's shoe, A = 0.002 m²
The pressure exerted by the girl is calculated as follows;
[tex]P = \frac{F}{A} \\\\Where;\\F \ is \ the \ force \ exerted \ by \ girl's \ weight\\\\P = \frac{F}{A} = \frac{mg}{A} = \frac{50 \times 9.8}{0.002} = 245,000 \ N/m^2[/tex]
Therefore, the pressure exerted by the girl is 245,000 N/m²
A positively charged rod is brought close to a neutral metal sphere. Explain what
happens to the charges in the neutral sphere as the rod comes close, touches the
sphere, and then moves away. Is the metal sphere still neutral at the end of this
encounter?
Answer:
No, the metal sphere becomes positively charged because electrons are transferred from the sphere to the rod.
what is parking orbit?
Answer:
A temporary orbit in which a spacecraft awaits the next phase of its mission .
what did I have for breakfast this morning
A light bulb used in homes converts electrical energy into light energy . The total input power of the light bulb is 52 W. The efficiency of the light bulb is 5.0\% . Calculate the amount of light energy output by the lamp in 9.0 hours of use.
Show the calculations.
WILL AWARD BRAINLY
Answer:
sry I can't help you In that
A light bulb used in homes converts electrical energy into light energy The amount of light energy output by the lamp in 9.0 hours of use is 23.4 J.
What is electrical energy?The ability of an atom's charged particles to initiate an activity or move an object is known as electrical energy.
The proportion of the device's useful energy transferred to the device's total energy input.
The input power of the light bulb = 52 w.
In 9.0 hours of use.
Hence,
52 x 9.0 = 468 J
The following equation calculates efficiency as a percentage and is represented as follows:
Efficiency is calculated as (Usable Energy Output/Total Energy Input) x 100%.
The lightbulb's efficiency is 5.0%.
(The light energy output/ 468) x 100% = 5%
So, the light energy output = 23.4 J
Therefore, the amount of light energy output by the lamp in 9.0 hours of use is 23.4 J.
To learn more about electrical energy, refer to the link:
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The flow chart shows the life cycle of a star. Was this star smaller than our sun, about the same or bigger than our sun?
1. Bigger
2. About the same
3. Smaller
The star is bigger than our sun. The correct option is 1.
The flow chart of the life cycle of a star indicates that the star starts as a nebula, which is a cloud of gas and dust. The nebula can collapse due to gravitational forces and form a protostar. The protostar can then continue to contract and heat up until it reaches a temperature and density at which nuclear fusion can occur, leading to the star entering the main sequence phase.
The size of a star is determined by its mass, and the more massive a star is, the bigger it will be. Based on this information, we can infer that if a star follows the life cycle shown in the flow chart, starting from a nebula and eventually reaching the main sequence, it must be at least as massive as our sun or even more massive, since only stars with sufficient mass can become main sequence stars.
To learn about the heliocentric model of the Solar System click:
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what is usually placed on the x axis
Answer:
(independent variable) x-axis
(dependent variable) y-axis
A 60 kg girl on a swing is pulled 1.5 meters back and then released. The girl oscillates at pi/3 radians per second.How far from equilibrium will the girl be in 4 seconds into the motion
Answer:
-0.75 m
Explanation:
The displacement of the girl is given by x = x₀cosωt where x₀ = maximum displacement of swing = 1.5 m, ω = angular frequency = π/3 rad/s and t = time of swing = 4 s
Substituting the values of the variables into the equation, we have
x = x₀cosωt
x = (1.5 m)cos(π/3 rad/s × 4 s)
x = (1.5 m)cos(2π/3)
x = (1.5 m)cos120°
x = 1.5 m × -0.5
x = -0.75 m
So, the girl is 0.75 m to the left of the equilibrium position 4 seconds into the motion.
What is the product of an object’s mass and velocity equal to?
a. Acceleration
b. Work
c. Power
d. Momentum
Answer:
momentum (d) it's s preety easy haaaaaaaa
25 POINTS PLS ANSWER
which phrase describes a scientific law
A. a statement that can be used to predict the motions of two objects only under special conditions
B. An explanation of why the force of gravity exists between two objects
C. A claim about the pull between objects that cannot be verified through experimentation
D. An equation that can be used to accurately calculate the pull of gravity between two objects
Answer:
A
Explanation:
a statement that can be used to predict the motions of two objects only under special conditions
2. A student drew the diagram below to model the movement of an object orbiting the Sun. Which object was she most likely modeling? a meteor a planet a comet an astroid
Answer:
A comet
Explanation:
The picture is of an elliptical orbit of a comet. You can tell it is a comet because of the tail. Also, I just took the test and it was a comet.
an interaction between organisms that rely on the same resources?
Answer:
... is called competition.
Explanation:
competition for same thing
158 Milligrams of salt are on the table. How many Grams of salt are on the table?
a .158 Kg
b 1.58 Kg
c 15.8 Kg
d 1,580 Kg
Answer:
A is the correct answer 0.158
158 Milligrams of salt are on the table there would be 0.158 grams of salt on the table, therefore the correct answer is option A.
What is a unit of measurement?A unit of measurement is a specified magnitude of a quantity that is established and used as a standard for measuring other quantities of the same kind. It is determined by convention or regulation.
As given in the problem 158 Milligrams of salt are on the table, then we have to find out how many grams of salt is on the table,
1000 milligrams = 1 gram
1 milligram = 1 / 1000 grams
158 milligram = 158 × 1 / 1000 grams
=0.158 grams
Thus, there would be 0.158 grams of salt on the table, the correct answer is option A.
To learn more about the unit of measurement from here, refer to the link;
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The question is incomplete the complete question is,
158 Milligrams of salt are on the table. How many Grams of salt is on the table?
a .158 g
b 1.58 g
c 15.8 g
d 1,580 g
A 1.6 Kg bird that is flying through the air has 220 J of kinetic energy. How fast is the bird flying?
20.5 m/s
19.4 m/s
18.2 m/s
16.6 m/s
cuh
Answer:
v = 16.58 m/s
Explanation:
Given that,
Mass of a bird, m = 1.6 kg
Kinetic energy of the bird, K = 220 J
We need to find the speed of the bird. The formula for the kinetic energy is given by :
[tex]E=\dfrac{1}{2}mv^2[/tex]
Where
v is the speed of the bird
So,
[tex]v=\sqrt{\dfrac{2E}{m}}[/tex]
Put all the values,
[tex]v=\sqrt{\dfrac{2\times 220}{1.6}}\\\\v=16.58\ m/s[/tex]
So, the speed of the bird is equal to 16.58 m/s.
There is a bell at the top of a tower that is 45m high. The bell weighs 190N. The bell has ___________________ energy. Calculate it.
I NEED THE ANSWER PLEASE
Answer:
250mn
Explanation:
An object's period of oscillation can always be used to solve for which 2 points
variable? *
Velocity
Weight
Frequency
Momentum
Answer:
Frequency
Explanation:
A period is the number of revolutions in a minute.
[tex] Period = \frac {time}{number \; of \; oscillations}[/tex]
Also, frequency can be defined as number of oscillation per unit time.
Mathematically, frequency is given by the formula;
[tex] Frequency = \frac {number \; of \; oscillations}{time}[/tex]
Thus, we can deduce that frequency of an oscillation is the inverse of the period (time) of oscillation.
Mathematically, period is expressed as;
[tex] Period = \frac {1}{frequency}[/tex]
This ultimately implies that, an object's period of oscillation can always be used to solve for frequency.
which of the following nuclei is most stable based on its binding energy
A Manganese (mn - 55)
B Zinc (Zn - 64)
C Iodine (I - 127)
D Sodium (Na - 23) Help needed
SUBMIT
Answer:
managanes ( mn - 62 )zinc ( 1 25 )iodin 156An electron with a charge of -1.6 x 10-19 C experiences a force of 9.2 x 10-15 N. What is the intensity of the electric field?
Answer:
Explanation:
[tex]E=\frac{q}{F}[/tex] where q is the charge of the electron and F is the electrostatic force. Filling in:
[tex]E=\frac{-1.6*10^{-19}}{9.2*10^{-15}}[/tex] which gives you an electric field magnitude of
E = -1.7 × [tex]10^{-5[/tex] C/N
A man ran a 5 mile race. The race looped around a city park and back
to the starting line. What is the man's total displacement?
A. 0 miles
B. 2.5 miles
C. 5 miles
D. 10 miles
Answer:
How big the city because it could be a big all city
Analyze the given velocity time graph
Answer:
Where' the graph
Explanation:
Si: A + B = C – D es una ecuación física donde A, B, C y D son magnitudes físicas entonces [ A ] = [ B ] = [ C ] = [ D ]
Answer:
[tex][A] = [B] = [C] = [D][/tex] por el Principio de Homogeneidad Dimensional y el uso de operaciones de adición y sustracción.
Explanation:
Por el Principio de Homogeneidad Dimensional, A, B, C y D deben tener las mismas magnitudes físicas para la realización de operaciones de adición y sustracción. Es decir:
[tex][A] + [B] = [C] - [D][/tex], donde [tex][A] = [B] = [C] = [D][/tex]