Answer: D
X: positive
Y: negative
Explanation:
It's either A or D and I chose A and got it wrong.
Answer:
D) Y and Z are opposite charges, but their identities cannot be determined.
Explanation:
i got it right
Anand gets into an elevator and travels 50 m straight up in a time of 5 s. He then travels in the opposite direction, straight down, for 70 m in a time of 6 s. What is his average speed and velocity, respectively, over the 11 s period?
A. 10.9 m/s, 1.82 m/s
B. 10.9 m/s, −1.82 m/s
C. 21.8 m/s, 10.9 m/s
D. −10.9 m/s, 5.2 m/s
Answer:
10.9 m/s, −1.82 m/s
Explanation:
We have,
Anand gets into an elevator and travels 50 m straight up in a time of 5 s. He then travels in the opposite direction, straight down, for 70 m in a time of 6 s.
Total time of journey is 11 seconds.
Total distance is 50 m + 70 m = 120 m
Total displacement is 50 m - 70 m = -20 m
Average speed, [tex]s=\dfrac{120\ m}{11\ s}=10.9\ m/s[/tex]
Average velocity, [tex]v=\dfrac{-20\ m}{11\ s}=-1.82 \ m/s[/tex]
So, the correct option is (b) 10.9 m/s, −1.82 m/s.
In a nuclear fusion reaction, the mass of the products is _____ the mass of the reactants.
Answer:
more than
Explanation:
In a nuclear fusion reaction, the mass of the products is more than the mass of the reactants.
A boy of 65 kg is skating around a circle with radius 3.8
meters. If he is moving at 4.25 m/s, what is his angular
momentum? (Round to the nearest hundredth).
A 1049.75 Nms
B 27.63 Nms
C 276.25 Nms
D 10.50 Nms
E 104.98 Nms
Answer:
A 1049.75
Explanation:
notice that a Nms is equal to a kg(m^2)/s which is what you get if multiply all three given values.
the formula is angular momentum = (mass)(velo)(radius)
therefore
65(3.8)(4.25) = the answer
= 1049.75
Answer fast, please.
A hockey puck moving at 28 m/s is caught by an 80,00 kg man who was at
rest. The man and puck move together after the collision. The pucks mass is
0.16 kg. What is the final velocity?
A. 0.06 m/s
B. 4.5 m/s
C. 1.36 m/s
D. 8 m/s
Answer:
A
Explanation:
all the work is in the attached file :D
Terry can ride 30 miles in 2 hours. If his riding speed is
reduced by 3 mph (mile/hour), how far can he ride in 1.7 hours?
miles
Answer: 20.4 miles
Explanation:
Here we need to use the equation:
Velocity = Distance/Time.
Initially we have that he can travel 30 miles in 2 hours, so the velocity is:
V = 30mi/2h = 15mph
Now, we reduce the velocity by 3 mph, so the new velocity is 15mph - 3 mph = 12mph.
Now we want to know the distance traveled in 1.7 hours with this velocity, this is.
Velocity*Time = Distance
12mi/h*1.7h = 20.4 miles
Static electricity is an excess of neutrons.
A True
B. False
Answer: Static electricity is an excess of neutrons-FALSE
Explanation:
A P E X
Which factors affect the speed of ocean waves?
Answer:
The speed of all ocean waves is controlled by gravity, wavelength, and water depth. Most characteristics of ocean waves depend on the relationship between their wavelength and water depth. Wavelength determines the size of the orbits of water molecules within a wave, but water depth determines the shape of the orbits
Explanation:
PLEASE GIVE ME BRAINLIEST
Describe the relationship between the direction of the velocity vector and the direction of the acceleration for a body moving in a circle at constant speed.
A concave mirror forms a real image at 15.0 cm from the mirror surface along the principal axis. If the corresponding object is at a distance of 30.0 cm, what is the mirror's focal length? Please show your work
Answer:
Focal length, f = 10 cm
Explanation:
We have,
A concave mirror forms a real image at 15.0 cm from the mirror surface along the principal axis, it means that the image distance is 15 cm
The object is placed at a distance of 30 cm, u = -30 cm
It is required to find the focal length of the mirror. Let it is f. Using mirror's formula to find it:
[tex]\dfrac{1}{v}-\dfrac{1}{u}=\dfrac{1}{f}\\\\\dfrac{1}{15}-\dfrac{1}{(-30)}=\dfrac{1}{f}\\\\f=10\ cm[/tex]
So, the focal length of the mirror is 10 cm.
what is kinetic energy
Answer:
energy which a body possesses by being in motion.
Explanation:
ASAP pls answer Correctly and I will mark the brainliest
What needs to be the relation between the two forces to cause the upper magnet to float without moving?
Answer:
If it points the other way, the fields subtract, for a lower energy, and so the magnet prefers to turn to point in this way. Magnets in uniform fields feel torques which make them turn around if they are not pointing in the right direction, but there is no net force making the magnet want to levitate.
Explanation:
The corn plants in the image below have been grown with Lepidoptera sp. larvae, insects that feed on the corn’s cob and leaves. Select the statement that is correct, based on the image.
A. A resistance gene was inserted into the plant on the right, but the corn is still vulnerable to Lepidoptera sp. larvae.
B. A resistance gene was inserted into the plant on the right that makes the corn resistant to Lepidoptera sp. larvae.
C. A resistance gene was inserted into the plant on the left that makes the corn vulnerable to Lepidoptera sp. larvae.
D. A resistance gene was inserted into the plant on the right, but the corn cob is mutated.
Answer:
Option D is correct
Explanation:
The image on the left is the control plant which means it is the normal plant that is allowed to grow under normal regular condition so that its parameter can be compared with the parameters of the transformed plant on the right. Thus, plant on the right has been introduced with the resistance gene and hence it possess mutated cob and leaves that are not attacked by the Lepidoptera sp. larvae
Hence, option D is correct
When the motion energy of an object changes, there is inevitably some other change in energy at the same time. If an object is slowing down, where is the energy going? (Check all that apply)
Question 9 options:
The potential energy could be increasing, like a ball thrown into the air.
The kinetic energy could be lost to friction or air resistance.
The ball could be returning to its natural resting state.
Due to the conservation of energy, the kinetic energy must stay the same.
Explanation:
This problem bothers on the conservation of mechanical energyThis is the principles in which the energy changes by virtue of the position of the body and when in motion are conserved.
The principle of conservation of mechanical energy states that "energy can neither be created nor destroyed but can be transformed from one form to another".
Based on the principle of energy conservation the correct options are
The potential energy could be increasing, like a ball thrown into the air.The kinetic energy could be lost to friction or air resistance.The ball could be returning to its natural resting state.What happens to inertia as you increase the mass?
Why are cells important?
Answer:
Cells are the basic structures of all living organisms. Cells provide structure for the body, take in nutrients from food and carry out important functions. ... These organelles carry out tasks such as making proteins?, processing chemicals and generating energy for the cell.
Explanation:
Answer:
Cells make up all the parts of your body, and we need different ones to make different parts, like bones, blood, and skin. Without them, humans, along with plants and animals, would not exist.
Explanation:
Write the formula for kinetic energy that uses force in its equation. Calculate the kinetic energy generated when a 2500 N force is applied to a car when moving it 200 m. Show work.
Answer:
500000 J
Explanation:
ΔKE =Work = F*d = 2500 N * 200 m =500000 J
Which are descriptions of gravity on Earth? Check all that apply.
an attractive force
a repulsive force
a noncontact force
a contact force
a horizontal force
a vertical force
Answer:
an attractive force
a noncontact force
a vertical force
Explanation:
Gravitational force is a NON-CONTACT FORCE. Gravitational force acts on all bodies on the earth that have mass. The force which is exerted through weight acts on the center of gravity of the body. The force is directed towards the center of the earth. The weight of a body is the gravitational force exerted by the earth on the body.
A,C,F.
Explanation: Got it correct.
Assemble the electromagnetic spectrum by dragging each piece to the correct place on the wavelength scale.
Answer:
long wave with a frequency of nos 10⁶ Hz, to radio waves
* order of 10⁸ Hz TV and FM
* in the 10⁹ to 10¹¹ Hz microwave range
* in the range of 10¹² to 10¹⁴ infrared waves, thermal energy
* in the range of 10¹⁴ visible light captured by humans
* for range 10¹⁵ to 10¹⁸ UV light
* in the range of 10¹⁶ to 10²⁰ X-rays
* for more than 10¹⁹ Hz cosmic rays
Explanation:
The electromagnetic spectrum is formed by transverse waves that are the oscillations of electric and magnetic fields
c = λ f
in general this spectrum is divided into range depending on the uses of the waves
from lower frequency to higher we have
* long wave with a frequency of nos 10⁶ Hz, corresponds to radio waves
* tv wave and modulated frequency, of the order of 10⁸ Hz, television and FM radio
* in the 10⁹ to 10¹¹ Hz microwave range
* in the range of 10¹² to 10¹⁴ infrared waves,
* in the range of 10¹⁴ visible light captured by humans
* for range 10¹⁵ to 10¹⁸ UV light
* in the range of 10¹⁶ to 10²⁰ X-rays
* for more than 10¹⁹ Hz cosmic rays
Answer:
long wave with a frequency of nos 10⁶ Hz, to radio waves
order of 10⁸ Hz TV and FM
in the 10⁹ to 10¹¹ Hz microwave range
in the range of 10¹² to 10¹⁴ infrared waves, thermal energy
in the range of 10¹⁴ visible light captured by humans
for range 10¹⁵ to 10¹⁸ UV light
in the range of 10¹⁶ to 10²⁰ X-rays
for more than 10¹⁹ Hz cosmic rays
Explanation:
Pretend you are explaining to a friend an object's energy can change depending on the position of the object. Use details from the text to help you write your conversation below.
The text is the picture
I WILL MARK YOU AS BRAINLIEST
Answer:
sorry, need better iinformation
Explanation:
.
Answer:
i am confused
Explanation:
the magnification priduced by a spherical mirror is +1/4.what type of image is formed?
Explanation:
As the magnification is positive , thus the image formed is inverted and real
1. When an object moves it acquires
(a) friction
(b) traction
(d) speed
(c) energy of motion
When an object moves it acquires energy of motion. An thing that is in motion gains energy of motion, often known as kinetic energy. The energy an item possesses as a result of its motion is known as kinetic energy.
The item accumulates kinetic energy when it moves faster or at a specific velocity. The mass and speed of the item affect the quantity of kinetic energy.
Kinetic energy is calculated as KE = 0.5 * mass * velocity * 2. Because of the direct connection between an item's speed and the energy required to move it, the kinetic energy of an object grows exponentially as its velocity rises.
To know more about energy :
https://brainly.com/question/1932868
#SPJ6.
What is true of both gravity and magnetism?
Both are dependent on mass.
Both forces can act without objects touching.
Both forces are directly proportional to the distance between the objects.
Neither is a fundamental force of nature.
Explanation:
I want to say option B - Both forces can act without objects touching.
When tectonic plates are strained to the point that they can no longer bend, which of the following is most likely to occur?
A. Earthquake
B. Volcanic Eruption
C. Convection Current
D. Ocean Basin Formation
When tectonic plates are strained to the point that they can no longer bend, (A) earthquake most likely to occur.
What is earthquake?An earthquake is the sudden release of energy from the earth's crust that causes the earth's surface to shake. Seismic waves, also called S waves, are consequently produced. The type and severity of an earthquake are based on the local seismic activity.
What is Volcanic Eruption?A volcanic eruption occurs when elements of the Earth, such as hot lava, rocks, and dust, erupt from a volcano in the form of an explosion. The upper portion of the volcano or one of the side branches may explode. If massive volumes of rock and volcanic ash begin to erupt, it might be dangerous. Occasionally, numerous lives are lost in these explosions.
When tectonic plates are strained to the point that they can no longer bend, in such scenario, earthquake is most likely to occur.
Learn more about earthquake here:
https://brainly.com/question/1296104
#SPJ2
The distance from the maximum disturbance to the undisturbed position is the____ of a wave
Answer:
The amplitude of a wave is its maximum disturbance from its undisturbed position
_____________ radiation is the least harmful type of radiation.
Alpha
Beta
Gamma
Explanation:
Alpha radiation is the least harmful type of radiation.
plz give me brainliest
The white disks in the petri plates are soaked in herbicide, which affects the roots, stalks, leaves, and cobs of a corn plant. If the transformed plants were grown in the presence of herbicide, which corn plant would result from the choices shown below?
A. Corn plant A.
B. Corn plant B.
C. Corn plant C.
D. Corn plant D.
Answer: Corn Plant C
HOPE THIS HELPS
STAY SAFE
-Carrie
P.S. It would mean a lot if you marked brainliest <3
Carbon (C) and hydrogen (H) are pure substances. Each is made of only one type of atom, but carbon atoms are different from hydrogen atoms. Carbon and hydrogen chemically combine to form methane (CH4).
Carbon (C) and hydrogen (H) are pure substances. Each is made of only one type of atom, but carbon atoms are different from hydrogen atoms. Carbon and hydrogen chemically combine to form methane (CH4).
Based on this information,
A.
carbon and hydrogen are elements and methane is a compound.
A negative test charge experiences a force to the right as a result of an electric field. Which is the best conclusion to draw
based on this description?
The electric field points to the left because the force on a negative charge is opposite to the direction of the field,
The electric field points to the right because the force on a negative charge is in the same direction as the field,
No conclusion can be drawn because the sign of the charge creating the field is unknown,
No conclusion can be drawn because the amount of charge on the test charge is unknown.
Answer:a
Explanation:
Answer: ( A )
Explanation: the answer is a
