Answer:
Explanation:
There are 3 main forces at work here, gravity, normal and friction. The gravity pulls the car straight down and is what keeps the car on the ground. Normal force is straight up from the points where the car is touching, so since the wheels are the only parts of the car touching the street, this is where all the normal force is. Friction force opposes any and all motion, the car wants to slide down the hill and would slide down the hill if there was no friction, so the friction force is in the opposite direction of the cars intended motion.
An astronaut drops a 1.0 kg object and a 5.0 kg object on the Moon. Both objects fall a total distance of 2.0 m vertically. Which of the following bost describes the objects after they have fallen a distance of 1.0 m2
They have each gained one-half of their maximum kinetic energy
They have cach lost the same amount of potential energy
They have each gained the same amount of potential energy
They have each lost kinetic energy
Answer:
Chupapi munyaño hoyaaaa
A concave shaving mirror has a radius of curvature of 25.0 cm. For each of the following cases, find the magnification and determine whether the image formed is real or virtual and upright
or inverted,
(a) an upright pencil placed 46.0 cm from the mirror
(b) an upright pencil placed 5.0 cm from the mirror
(a) The magnification is less than 1, the image is smaller than the object. Therefore, the image is real, inverted, and smaller than the object. (b)The magnification is less than 1 in magnitude, the image is also smaller than the object. Therefore, the image is virtual, inverted, and smaller than the object.
What do you understand by magnification?In mirrors, magnification refers to the degree to which an object's size appears to be larger or smaller when reflected in a mirror. The magnification of a mirror is determined by its curvature and distance from the object being reflected.
We can use the mirror equation and magnification formula to solve the problem:
Mirror equation:
1/f = 1/do + 1/di
Magnification formula:
m = -di/do
where
f = focal length of the mirror
do = object distance from the mirror
di = image distance from the mirror
m = magnification
Given:
Radius of curvature, R = 25.0 cm (since the mirror is concave, R is negative)
focal length, f = R/2 = -12.5 cm
(a) For an upright pencil placed 46.0 cm from the mirror:
do = 46.0 cm
Using the mirror equation, we can solve for di:
1/f = 1/do + 1/di
1/-12.5 = 1/46.0 + 1/di
di = -17.2 cm
Since di is negative, the image is formed behind the mirror, which means it is real. Also, the magnification is:
m = -di/do = -(-17.2 cm)/46.0 cm = 0.374
Since the magnification is less than 1, the image is smaller than the object. Therefore, the image is real, inverted, and smaller than the object.
(b) For an upright pencil placed 5.0 cm from the mirror:
do = 5.0 cm
Using the mirror equation, we can solve for di:
1/f = 1/do + 1/di
1/-12.5 = 1/5.0 + 1/di
di = 3.33 cm
Since di is positive, the image is formed in front of the mirror, which means it is virtual. Also, the magnification is:
m = -di/do = -3.33 cm/5.0 cm = -0.666
Since the magnification is negative, the image is inverted. Since the magnification is less than 1 in magnitude, the image is also smaller than the object. Therefore, the image is virtual, inverted, and smaller than the object.
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What is the average?
Answer:
Explanation:you knoe i know
Two identical balls are thrown from the top of a cliff, each with the same speed. One is thrown straight up, the other straight down. How do the kinetic energies and speeds of the balls compare as they strike the ground?
A) The ball that is thrown straight up will have more kinetic energy but less speed than the ball that is thrown straight down.
B) The ball that is thrown straight up will have more kinetic energy and more speed than the ball that is thrown straight down.
Both balls will have the same kinetic energy and speed.
C) The ball that is thrown straight up will have more kinetic energy but less speed than the ball that is thrown straight down.
D) The ball that is thrown straight down will have more kinetic energy and more speed than the ball that is thrown straight up.
Answer:
the answer is B.
Explanation:
The ball that is thrown straight up has more kinetic energy and more speed than the ball that is thrown straight down. Both balls have the same kinetic energy and speed.
What is the kinetic energy and potential energy?The kinetic energy of a body can be determined as the energy of a moving physical system because of its motion. Work has to be done on an object to change its kinetic energy.
The kinetic energy of the moving system can be expressed as K.E. = ½mv² where ‘m’ is mass while ‘v’ is the velocity of the object.
The potential Energy of the physical system can be described as the energy stored due to its position. The mathematical formula for the calculation of the potential energy can be expressed in the form of P.E = m×g×h where ‘g’ is the gravitational acceleration, ‘m’ is the mass and ‘h’ is the height in meters
When two identical balls are thrown from a cliff, each with the same speed. One ball is thrown straight up, and the other ball is straight down. Both balls will have the same kinetic energy as well as speed.
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A girl who is watching a plane fly tells her friend that the plane isn't moving at all. Describe a frame of reference in which the girl's description would be true.
The girl's reference frame must be moving with the same speed as the plane.
If an observer is stationary and he watches a car moving he can observe that the car has a momentum and is moving with certain speed. But if the observer is in the car or moving with same speed, the car does not appear to move away form the observer. Likewise, two observers moving with different speed will have different observation about the same car.
Similarly, if the girl describes the plane is not moving that means either she is in the plane or moving with the same speed along with the plane.
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A 75 kg cannon ball is fired from a 500 kg cannon. If the cannon balls speed is 4 m/s immediately after leaving the raft what is the recoil speed of the cannon
Answer:https://www.ux1.eiu.edu/~cfadd/1150-05/Hmwk/Ch09/Ch09.html
i has the answer that you need i think i could not take a screen shot of it sorry
Explanation:
Refer to the image shown to answer the question.
If a light ray is reflected off the shiny surface at 170 degrees, at what angle did the light ray first strike the surface?
170 degrees
70 degrees
110 degrees
10 degrees
Answer:10
Explanation: if you look it has a 170 but some people have 70 if you have 170 then it will be 10 if you have a 70 then it will be 110 if I'm right then Yw
Answer:
10
Explanation:
i took the quiz xoxo
Approximately how much electrical energy does a 5-W lightbulb convert to radiant and thermal energy in one hour?
Answer:
18,000 j
Explanation:
the lightbulb dissipates 5W of power
P = ΔE / Δt
rearrange to solve for energy
ΔE = PΔt
P = 5W
t = 1 hour = 60 minutes = 3600 seconds
ΔE = 5 * 3600
ΔE = 18000 J
A spring oscillates with a period of
0.228 S. What is its frequency?
(Unit = Hz)
Answer:4.39
Explanation:For acellus students the answer is 4.39
speed of light in air is 3 x 10 m/s, determine the speed of light in the glass fibre.
How much force is needed to keep the bowling ball moving towards the pins once it has
left the man's hand?
Please help me!
Answer:
Explanation:
The amount of force needed needs to be greater than all the forces acting in the opposite direction that the bowling ball was thrown. This includes air resistance, floor friction, gravity, and any other force involved. As long as the force acting on the bowling ball that is causing it to go in the direction of the pins is slightly greater than the opposite acting forces then it will continue in that direction. Since no values are provided we cannot calculate the actual precise value of force needed.
Kara started a new exercise program. Kara’s sister works out with her on a regular basis and even talks to Kara about her progress. In this scenario, what is another name for Kara’s sister?
A.
goal-setter
B.
self-monitor
C.
support system
D.
nutritionist
300 grams of ethanol is heated with 14640 Joules of energy to reach a final temperature of 30 °C. What was the initial temperature of the ethanol? The specific heat of ethanol is 2.44 J/g·°C.
Answer:
10 °C
Explanation:
Applying
q = cm(t₂-t₁)............... Equation 2
Where q = heat energy, c = specific heat of ethanol, m = mass of ethanol, t₁ = initial temperature, t₂ = Final temperature.
Given: c = 2.44 J/g.°C, m = 300 g, q = 14640 J, t₂ = 30°C
Substitute into equation 2 and solve for t₁
14640 = 2.44×300(30-t₁)
14640 = 732(30-t₁)
732(30-t₁) = 14640
(30-t₁) = 14640/732
(30-t₁) = 20
t₁ = 30-20
t₁ = 10 °C
Answer:
30°C
Explanation:
i just did it
a baseball with a mass of 0.8 kg is moving at asperd of 45.0 m/s . what is the baseballs kinetic energy
SOMEONE HELP PLEASE!!
Answer:
0.5*0.8*45^2. =810J
Explanation:
KE=1/2 mv^2
How can you cause a substance to turn from a solid to a liquid or from a liquid to a gas? Help
Answer:
When the temperature increases
Explanation:
when people walked on the moon, they found that they could jump higher than theu could back on earth. why is this true?
Answer:
There is less gravity on the moon
hope this helps
have a good day :)
Explanation:
What are the first three harmonics of a note produced on a 0.31 m long violin string if the waves on this string have a speed of 274.4 M/s
Answer:
442 Hz, 882 Hz, 1330 Hz
Explanation:
Given data: length of the string= 0.31 m = 31 cm
speed of the waves = 274.4 M/s or 2740 cm/s
Wavelengths are
62 cm
31 cm and
62 / 3 = 20.67 cm
The frequencies associated with these wavelengths ( which are the 1st, 2nd and 3rd harmonics )
are
27440/ 62 = 442.6 = 442 Hz
27440/31 = 885.2 = 882 Hz
27440 / 20.67 = 1328 = 1330 Hz
A projectile thrown up ward moves in its parabolic path at what point..
Answer:
please give me brainlist and follow
Explanation:
As the projectile moves upward, its vertical component of velocity decreases due to gravity. While the horizontal component remains the same as there is no acceleration in the horizontal direction. At maximum height vertical component of velocity is zero.
Ignoring air resistance, an object thrown in any direction moves in a parabolic path from the time it leaves the thrower's hand until the time it hits the ground or a physical obstruction.
What is always true about the total amount of oxygen and carbon dioxide in the test tube?
explain how a syringe dra
ws blood from a patient's body
Answer:
You first push in then when the syringe is full push the out
Explanation:
1. in
2. out
but u should watch a You-tube video just in case
I hoped this helped!
Q2: (2 marks) (show your work)
What is the net force on the box shown below?
30 N
60 N
20 N
Answer:
Net force = the difference between the forces of two directions
Net force= 60N-(30N+20N)
=60-50
Therefore Net force = 10N
What is the solution to unit for measuring electric current?
Answer:
The SI unit for electric current is Ampere (A)
(show your work)
What is the net force on the box shown below?
30 N
60 N
20 N
30
60 20
< Square >
Answer:
I don't do physics , I'm sorry can't help you
Uranium-238 undergoes alpha decay. In addition to the alpha particle, which isotope forms?
Answer: B - 234/90 TH
Explanation: A P 3 X
Answer: B - 234/90 TH
Explanation:
How does the Coriolis effect influence the direction of the Trade Winds in the Northern Hemisphere? Does it have the same effect in the Southern Hemisphere?
Answer:
Part A
Coriolis effect is used to describe how objects which are not fixed to the ground are deflected as they travel over long distances due to the rotation of the Earth relative to the 'linear' motion of the objects
Due to the Coriolis effect the wind flowing towards the Equator from high pressure belts in the subtropical regions in both the Northern and Southern Hemispheres are deflected towards the western direction because the Earth rotates on its axis towards the east
Part B
In the Northern Hemispheres, the winds are known as northeasterly trade winds and in the Southern Hemisphere, they are known as the southeasterly trade wind. Therefore, Coriolis effect has the same effect on the direction of the Trade Winds in the Southern Hemisphere as it does in the Northern Hemisphere
Explanation:
What are the difference between copper and sodium once you put it to flame?
Answer:
When you burned the skewer tip coated with sodium chloride, you should have seen that the flame was pure yellow-orange (without any blue). This is because when the metal sodium is burned, it makes intense yellow-orange light. ... This is because when the metal copper is burned, it makes bluish-green light.
hope this helps
A 1.2 kg block is held at rest against the spring with a force constant k= 730 N/m. Initially, the spring is compressed a distance d. When the block is released, it slides across a surface that is frictionless except for a rough patch of width 5.0 cm that has a coefficient of kinetic friction = 0.44. Find d, such that the block's speed after crossing the rough patch is 2.3 m/s.
Answer:
Compression distance: [tex]d \approx 0.102\,m[/tex]
Explanation:
According to this statement, we know that system is non-conservative due to the rough patch. By Principle of Energy Conservation and Work-Energy Theorem, we have the following expression that represents the system having a translational kinetic energy ([tex]K[/tex]), in joules, at the expense of elastic potential energy ([tex]U[/tex]), in joules, and overcoming work losses due to friction ([tex]W_{l}[/tex]), in joules:
[tex]K + W_{l} = U[/tex] (1)
By definitions of translational kinetic and elastic potential energies and work losses due to friction, we expand the equation described above:
[tex]\frac{1}{2}\cdot m \cdot v^{2} +\mu\cdot m\cdot g \cdot s = \frac{1}{2} \cdot k \cdot d^{2}[/tex] (2)
Where:
[tex]m[/tex] - Mass of the block, in kilograms.
[tex]v[/tex] - Final velocity of the block, in meters per second.
[tex]\mu[/tex] - KInetic coefficient of friction, no unit.
[tex]g[/tex] - Gravitational acceleration, in meters per square second.
[tex]s[/tex] - Width of the rough patch, in meters.
[tex]k[/tex] - Spring constant, in newtons per meter.
[tex]d[/tex] - Compression distance, in meters.
If we know that [tex]m = 1.2\,kg[/tex], [tex]v = 2.3\,\frac{m}{s}[/tex], [tex]\mu = 0.44[/tex], [tex]g = 9.807\,\frac{m}{s^{2}}[/tex], [tex]s = 0.05\,m[/tex] and [tex]k = 730\,\frac{N}{m}[/tex], then the compression distance of the spring is:
[tex]\frac{1}{2}\cdot m \cdot v^{2} +\mu\cdot m\cdot g \cdot s = \frac{1}{2} \cdot k \cdot d^{2}[/tex]
[tex]m\cdot v^{2} + 2\cdot m\cdot g \cdot s = k\cdot d^{2}[/tex]
[tex]d = \sqrt{\frac{m\cdot (v^{2}+2\cdot g\cdot s)}{k} }[/tex]
[tex]d \approx 0.102\,m[/tex]
If the needle in the galvanometer is going up, what can you conclude about the motion of the magnet in the diagram?
It is not moving.
It must be moving left.
It must be moving right.
It is being moved in an unknown direction.
If the needle in the galvanometer is going up, the conclusion about the motion of the magnet is it must be moving right.
What is galvanometer?The galvanometer is the device used to detect the small current when moving coil is deflected.
When the magnet is moved towards or into the coil of wire, the magnetic field will change and voltage will be generated into the coil. The coil must be moving to the right when galvanometer going up.
Thus, the conclusion about the motion of the magnet is, it must be moving to the right.
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Which of the following factors should be considered when designing a personal fitness program?
A goals
В. activities
C. variety
D. all of the above
calculate speed and velocity of the following. the race car was moving for 3.7 hours and during that time it traveled a distance of 500 miles south. what is the speed the car was travelling?
Answer:
v = 135.13 mph
Explanation:
Given that,
The race car was moving for 3.7 hours and during that time it traveled a distance of 500 miles south.
We need to find the speed of the car.
We know that,
Speed = distance/time
So,
[tex]v=\dfrac{500\ miles}{3.7\ h}\\\\v=135.13\ mph[/tex]
So, the speed of the car is equal to 135.13 mph.