Answer:
8.6N
Explanation:
We use the eq
F=ma
By putting values
F=.43×20
F=8.6N
create PHet waves and explain the different when it increase and decrease
PLEASE HELP: A car is traveling at 72.0 km/h, when the driver notices an overturned truck blocking the road 95.0 m ahead. The car travels at 72.0 km/h for 0.50 s before the driver applies the brakes. (Please show work).
(a) How far does the car travel in that 0.50 s?
(b) If the car has an acceleration of -2.50 m/s², will it be able to stop before reaching the truck? If not, how fast is the car traveling when it collides with the truck?
Answer:
10 m
Yes, the car will be able to stop before it reaches the truck.
Explanation:
[tex]u=\text{Initial velocity of the car}=\dfrac{72}{3.6}=20\ \text{m/s}[/tex]
[tex]t=\text{Time}=0.5\ \text{s}[/tex]
[tex]s=\text{Displacement}[/tex]
From the laws of motion we have
[tex]s=ut+\dfrac{1}{2}at^2\\\Rightarrow s=20\times 0.5+0\\\Rightarrow s=10\ \text{m}[/tex]
The car will travel 10 m in 0.5 seconds
[tex]a=\text{Acceleration}=-2.5\ \text{m/s}^2[/tex]
[tex]v^2-u^2=2as\\\Rightarrow s=\dfrac{v^2-u^2}{2a}\\\Rightarrow s=\dfrac{0^2-20^2}{2\times -2.5}\\\Rightarrow s=80\ \text{m}[/tex]
Total distance required for the car to stop is 10+80 = 90 m. So, the car will be able to stop before it reaches the truck.
When light goes straight through a medium that means it has been
Question 8 options:
absorbed
reflected
transmitted
Answer:
Reflected
Explanation:
During the process of reflection whatever that is sent forth e.g light comes back (reflects)
Answer:
transmitted
Explanation:
took quiz
What is the voltage of a computer if the current if 40A and the resistance is 20 ohms?
Voltage = current x resistance
Voltage = 40 x 20 = 800 volts
Answer:
800v
Explanation:
v=IR
where V =Voltage,
I= Current
R= Resistance
V= 40x20
800v
What color will a green and red-striped shirt appear to be when only green light shines on it?
Answer:
Yellow
Explanation:
So while red, green and blue light shine upon the shirt, only red and green light will reflect from it. Red and green light striking your eye always gives the appearance of yellow; for this reason, the shirt will appear yellow.
3.Calculate the acceleration of a 1kg toy airplane that has been thrown with a force of 20N.
Answer:
The acceleration of a 1kg toy is 20m/s^2Explanation:
We are going to use the newtons law of motion (first law) to solve this problem
The expression is F=mawhere F is the force in Newton
m is the mass in kg and
a is the acceleration in m/s^2
given data
mass of the toy m= 1kg
force with which the toy is thrown = 20N
susbtituting we have
20=1*a
a= 20m/s^2
Which object is accelerating downward at the slowest rate? a textbook falling onto the surface of the moon a flower pot that has been pushed out a window a pebble falling off a cliff through the air a baseball thrown from third base to first base
Answer:
The acceleration of textbook is downward at the slowest rate.
(a) is correct option.
Explanation:
Given that,
The object is accelerating downward at the slowest rate.
(a). a textbook falling onto the surface of the moon
(b). a flower pot that has been pushed out a window
(c). a pebble falling off a cliff through the air
(d). a baseball thrown from third base to first base
We know that,
Acceleration :
Acceleration is the product of mass of object and gravity.
[tex]a=mg[/tex]
We need to find the accelerating downward at the slowest rate
According to given data,
Acceleration depends upon weight and gravity.
We have some example of free fall.
(b), (c) and (d) are the example of free fall.
In which the gravity is same.
But in option (a) textbook falling onto the surface of the moon
We know that,
The gravity on the moon is less than the earth.
So, we can say that the acceleration of textbook is downward at the slowest rate.
Hence, The acceleration of textbook is downward at the slowest rate.
(a) is correct option.
If a wooden ball has a mass of 2.4g and a volume of 6cm3. What is it’s density?
Answer:
The answer is 0.4 g/cm³Explanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 2.4 g
volume = 6 cm³
We have
[tex]density = \frac{2.4}{6} \\ [/tex]
We have the final answer as
0.4 g/cm³Hope this helps you
Good evening! Can someone please answer this, ill give you brainliest and your earning 50 points. Would be very appreciated.
CAN SOMEONE PLEASE ACTUALLY ANSWER THIS, PEOPLE JUST PUT RANDOM ANSWERS UNDER THE QUESTION I KEEP ASKING...
Answer:
gases that are not good at absorbing long wave photons of infra red.
Explanation:
border green house gases are hydrogen chloride and carbon monoxide.Border line gases like CO are weak gases but has indirect effects on global warming. This causes warming in the atmosphere.CO has a heavy mass and thus lies on border line ozone layer. These are bad absorbers unlike CO2 and steam which absorb long waves of photon of infra red well.Option B is correct
When hitting this golf ball, this golfer generates a velocity of 29 m/s with the club head. If the mass of the club head is 0.22
kg, what is the Kinetic energy this golfer generates?
A. 92.5 J
B. 105.7 J
C. 96.1 J
D. 84.1 J
Answer:
c.97.1j
Explanation:
yan po ang answer
chemical formula Periodic acid
the chemical formula for periodic acid is HI04
I hope this helps you
:)
During the combination of copper sulfate solution and zinc metal, 5 atoms of sulfate and 1 atom of copper interact with 1 atom of zinc, resulting in new products after the reaction. How many atoms are there before and after the reaction? Choose the letter of the correct answer.
A
before: 7 atoms; after: 5 atoms
B
before: 7 atoms; after: 6 atoms
C
before: 7 atoms; after: 0 atoms
D
before: 7 atoms; after: 7 atoms
Which change will cause the gravitational force between a baseball and a soccer ball to increase? Select three options. Moving the balls closer together moving the balls farther apart wrapping the soccer ball in layers of duct tape using a baseball with a thinner leather removing the outer layer of the baseball putting the baseball in a plastic case.
The three options are 1,3 and 5 Moving the balls closer together. The distance decreases and forces increase.
What is the gravitational force?The gravitational force ia s type of force has the ability attracts any two objects with mass. Gravitational force tries to pull two masses towards each other.
The value of the gravitational force is given by;
[tex]F_g=\frac{ Gm_ 1m_2}{r^2}[/tex]
It is observed that the gravitational force is directly propotional to the product of mass and inversly propotional to the square of the distance between them.
So, the correct options are :
(1) Moving the balls closer together. The distance decreases and forces increase.
(3) Wrapping the soccer ball in layers of duct tape will also increase force because the mass will increase.
(5) Similarly, putting the baseball in a plastic case will increase mass, and hence force increases.
Hence the three options are 1,3 and 5.
To learn more about the gravitational force refer to the link;
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Jermaine and Lashonda each rub their dry hair with inflated balloons. While doing this, the other students notice that their hair is starting to stick straight out. Next, the teacher takes the balloons and places them right next to one another. However, the balloons will not stay next to each other, as they normally would. Instead, they spring apart in opposite directions. Explain what is causing these balloons to push each other away. A) There must be a vent in the classroom blowing the two balloons apart. B) They have each gained negative charge from the hair rubbing, and like charges repel each other. C) They have each gained negative charge from the hair rubbing, and like charges attract each other. D) The rubber balloons are simply bouncing off each other the way a rubber ball bounces off the floor.
Answer: B
Explanation:
Due to the rubbing of the balloons on their hair, the balloons have gained negative charges which lie on the balloons surfaces. Like charges will repel each other according to the Coulomb force
Please help! Sorry if its blurry
What is the potential energy of a 150 kg diver standing on a diving board that is 10 m high the potential energy is what
Answer:
14715J
Explanation:
Ep = mgh
given that ,
m = 150kg
h =10
g = 9.81 m/s^2
Ep = 150 × 10 × 9.81
Ep= 14715J
Answer:
entergy is measured by weight mass and height
Explanation:
An inclined plane P, 1.6 m long, makes an angle 30° with the horizontal. A point mass M is shot from the bottom of P at a point A with a speed Vo = 5 m/s up the plane of greatest slope. Neglect air resistance.
1. How long does it take M to reach B, the top of P? Then find its velocity.
2. M leaves the plane at B without meeting any obstacle to hit the horizontal plane containing A at a point C.
3. Determine the position of C. Give all necessary explanations
The given length of the inclined plane of 1.6 m. inclined at 30° to the horizontal, and point mass velocity of 5 m/s gives;
0.199 secondsThe distance traveled horizontally from the top is 0.086 m1.472 meters horizontally from A How can the time and distance of the mass be found?Length of the inclined plane = 1.6 m
Angle of inclination of the plane = 30°
Speed of the point mass = 5 m/s
1. Height of the top of P above ground, h is found as follows;
h = 1.6 m × sin(30°) = 0.8 m
The equation of motion that can be used is; h = u•t - 0.5•g•t^2
Which gives;
0.8 = 5•t - 0.5×9.81×t^2
0 = 5•t - 4.905×t^2 - 0.8
t = 0.199, or t = 0.821
The time it takes the point mass to reach the top is approximately 0.199 seconds2. At the top, we have;
Horizontal velocity, vx = 0.5 × cos(30°)
Which gives;
Horizontal velocity, vx = 0.433 m/s
The distance traveled, x is found as follows;
= 0.433 m/s × 0.199 s = 0.086 m
The distance traveled by the point mass x = 0.086 m3. The position of point C is therefore;
C(0.086 + 1.6 × cos(30°), 0)
C(1.472, 0)
Therefore;
The position of point C is 1.472 meters from point ALearn more about the equations of motion here:
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If your mass is 45 kilometers and you travel to Jupiter where the acceleration due to gravity is 25.95 m/s², how much would you weigh on Jupiter?
A. 441.05 N
B. 450.172 N
C. 1,167.75 N
D. 2,595.0 N
Answer: A or B?
Explanation: its either those 2
A plane is traveling in northeast direction with a velocity of 75 m/s. The velocity vector of the plane makes a 40° with east-west line.
Answer:
Summary of Photorealism
The name Photorealism (also known as Hyperrealism or Superrealism) was coined in reference to those artists whose work depended heavily on photographs, which they often projected onto canvas allowing images to be replicated with precision and accuracy. The exactness was often aided further by the use of an airbrush, which was originally designed to retouch photographs. The movement came about within the same period and context as Conceptual art, Pop art, and Minimalism and expressed a strong interest in realism in art, over that of idealism and abstraction. Among several male practitioners of Photorealism there is an interest in themes of machinery and objects of industry such as trucks, motorcycles, cars, and even gumball machines, whereas Audrey Flack, the sole female practitioner, infuses her works with greater emotionality and the transience of life. Ultimately, the Photorealists were successful in attracting a wide audience, but they are often overlooked by art historians as an important avant-garde style.
Key Ideas & Accomplishments
Explanation:
Describe and explain the action of optical fibres
particularly in medicine and communications
technology
Answer:
Optical fibers are used most often as a means to transmit light between the two ends of the fiber and find wide usage in fiber-optic communications, where they permit transmission over longer distances and at higher bandwidths (data rates) than wire cables.
Explanation:
1) A current is induced by moving a magnet in and out of a coil of wire. What will happen to the induced current if you move the magnet twice as fast?
-Nothing, The induced current will not change.
-The induced current will decrease.
- The induced current will increase.
-The induced current will change directions.
2) A student connects a battery to a light bulb using wires, creating a closed simple circuit. The student connects an ammeter to the circuit and places a compass next to the wires. The student then decides to connect a second battery to the circuit. Which statement describes the changes that will occur after connecting the second battery?
- The compass will detect an increase in current, and the ammeter will detect a stronger magnetic field.
-The ammeter will detect an increase in current, and the compass will detect a weaker magnetic field.
-The ammeter will detect an increase in current, and the compass will detect a stronger magnetic field.
-The compass will detect an increase in current, and the ammeter will detect a weaker magnetic field.
3) A student is comparing a step-up transformer with a step-down transformer. Which data should she collect from each device?
- the ratio of incoming and outgoing voltages
- the ratio of the number of turns in the primary coils
-the ratio of incoming and outgoing currents
- the ratio of the number of turns in the secondary coils
4)What happens to a copper wire when it is moved across a magnetic field?
-Voltage and electric current are induced.
-Electric current is induced, but not voltage.
-It is attracted to the negative pole of the magnetic field.
-It is attracted to the positive pole of the magnetic field.
The induced current will increase if we move the magnet twice as fast.
Relationship of magnet's speed and induced currentWe know that an induced current is produced by a changing magnetic field. The greater the speed of the magnet, the greater the magnitude of the current so we can conclude that the induced current will increase if we move the magnet twice as fast.
Learn more about current here: https://brainly.com/question/24858512
Answer:
The induced current will increase.
Explanation:
When should scientific claims be questioned?
a. If you don't agree with them
b. If they are hard to understand
C. If they are based on a very small sample
d. If they are new
PER
Please select the best answer from the choices provided
Answer:
C) if they are based on a very small sample
energy loss happen when a filament bulb glow. Write a situation where this energy is used properly.
The use of energy for the purpose to boil water and warming the environment are the proper use of this lost energy.
How energy is properly utilized?The energy which is lost from the bulb is in the form of thermal energy. This thermal energy can be used to boil water or heating the surrounding environment so in this way the lost energy can be used properly.
So we can conclude that use of energy for the purpose to boil water and warming the environment are the proper use of this lost energy.
Learn more about energy here: https://brainly.com/question/25959744
Which change to an object would reduce its potential energy by half?
A. Reducing its height to one half of its original value
B. Increasing its mass to twice its original value
оооо
O C. Increasing its height to twice its original value
O D. Reducing its mass to one-quarter of its original value
SUBMIT
Answer:
D
Explanation:
1. Use the periodic table to determine which of the following groups of elements would have properties most similar to arsenic (As)
A . Boron (B) , silicon (Si) , and germanium (Ge)
B. Nitrogen (N), Phosphorous (P) , and antimony (Sb)
C. Germanium (Ge) , selenium (Se) , and bromide (Br)
D. Gallium (Ga) , germanium (Ge) , and selenium (Se)
Answer:
D
Explanation:
The correct answer would be option D.
Gallium (Ga) , germanium (Ge) , selenium (Se) , and arsenic (AS) all belong to the same group of elements referred to as the transition elements. The transition elements have partially-filled d orbital, a feature that confers some characteristic properties on the elements or their ions. These properties include:
variable oxidation state of formation of colored ions and compoundscatalytic propertyparamagnetic compoundsetc.car that is moving with a speed of 36 m/s brakes to a stop in 12 seconds. Calculate the acceleration of
the car during the braking
Answer:
how?
Explanation:
The titanium shell of an SR-71 airplane would expand when flying at a speed exceeding 3 times the speed of sound. If the skin of the plane is 400 degrees C and the linear coefficient of expansion for titanium is 5x10 -6 /C when flying at 3 times the speed of sound, how much would a 10-meter long (originally at 0C) rod portion (1-dimension) of the airplane expand?
Answer:
The 10-meter long rod of an SR-71 airplane expands 0.02 meters (2 centimeters) when plane flies at 3 times the speed of sound.
Explanation:
From Physics we get that expansion of the rod portion is found by this formula:
[tex]\Delta l = \alpha\cdot l_{o}\cdot (T_{f}-T_{o})[/tex] (Eq. 1)
Where:
[tex]\Delta l[/tex] - Expansion of the rod portion, measured in meters.
[tex]\alpha[/tex] - Linear coefficient of expansion for titanium, measured in [tex]\frac{1}{^{\circ}C}[/tex].
[tex]l_{o}[/tex] - Initial length of the rod portion, measured in meters.
[tex]T_{o}[/tex] - Initial temperature of the rod portion, measured in Celsius.
[tex]T_{f}[/tex] - Final temperature of the rod portion, measured in Celsius.
If we know that [tex]\alpha = 5\times 10^{-6}\,\frac{1}{^{\circ}C}[/tex], [tex]l_{o} = 10\,m[/tex], [tex]T_{o} = 0\,^{\circ}C[/tex] and [tex]T_{f} = 400\,^{\circ}C[/tex], the expansion experimented by the rod portion is:
[tex]\Delta l = \left(5\times 10^{-6}\,\frac{1}{^{\circ}C} \right)\cdot (10\,m)\cdot (400\,^{\circ}C-0\,^{\circ}C)[/tex]
[tex]\Delta l = 0.02\,m[/tex]
The 10-meter long rod of an SR-71 airplane expands 0.02 meters (2 centimeters) when plane flies at 3 times the speed of sound.
A boy runs 125 meters north, and the. 75 meters south
Answer:
50 meters
Explanation:
50 meters
50 meters
The area around the magnet where the force of the magnet attracts objects with metal is known as what?.
Make a sketch of the human nerve cell. What function do nerve cells perform
Answer:
The function of a nerve cell, also called a nueron, is to transmit messages from the body to the brain and from the brain to the body.