Answer:
Light bulbs started off with elements made of carbon, but over the years inventors added new elements such as tungsten, mercury, chlorine and europium to their toolkits
Explanation:
You drop a 5 kg ball from a height of 2 m. Just
before it reaches the ground, how much kinetic
energy does it have?
Answer:
Kinetic energy = 98 N
Explanation:
Given:
Mass = 5 kg
Height = 2 m
Find:
Kinetic energy
Computation:
K(e) = P(e)
So,
P(e) = mgh
So,
K(e) = (5)(9.8)(2)
Kinetic energy = 98 N
A horse accelerates from rest at 3 m/s2. How long does it take to reach a speed of 12 m/s?
Answer:
it will take 4.0 seconds
If the amount of force from the group on the left was 235 N, what is the amount of force from the group on the right
Answer:
(F = ma ) Newton's second law states that force is proportional to what is required for an object of constant mass to change its velocity. This is equal to that object's mass multiplied by its acceleration.
- What is the net force of 150 N → and ← 275 N?
Answer:
Net force = 125N
Explanation:
Let the two forces be A and B respectively.
Given the following data;
Forward force, A = 150N
Backward force, B = 275N
To find the net force;
Since the two forces are acting in opposite directions, we would subtract them to get the net force.
Net force = B - A
Net force = 275 - 150
Net force = 125N
Can someone explain what is referred by the cross sectional area of a solenoid? Is this the same for an air solenoid vs a solenoid with a solid core vs a solenoid with a hollow core?
Answer:
the cross section refers to the way in which it is wound, in general to the circle
circle does not depend on what it has inside
Explanation:
A solenoid is a wire wound in general in a circular shape, even when it is not forced, the cross section refers to the way in which it is wound, in general to the circle and is joined to determine the area
A = π r²
This circle does not depend on what it has inside, that is, it is the same section in the air, in a liquid or with a solid inside,
In order to have an airplane ascend, it needs to have more___
than weight. *
Drag
Weight
Lift
Thrust
Answer:
drag weight lift thrust
Brainliest if right.
Show your work: A wolf chasing an elk. The wolf has a mass of 100 kg and is running with a velocity of 16 m/s
to the right. What is the wolf's momentum?
The elk has a mass of 180 kg. What does the elk's speed have to be for it to have the same momentum as the
wolf?
Answer:
Explanation:
wolfs momentum is p=mv
so its 100 x 16 = 1600kg m/s
the elks velocity is 1600 = 180 x V
1600/180 = 8.88 m/s
Hello Dudes!
Pls help me in these 2 easy questions!
a. Define speed.
b. State its SI unit.
c. Write the formula for speed.
Answer:
speed is distance covered by body at certain or per time.
SI unit m/s
formula:
speed =distance covered/time taken
How would the particles be arranged in an object that has a high density? What about in
an object that has a low density?
Answer:
Explanation:
The particles in solids are very close together. They are tightly packed, giving solids high densities.
The particles in gases are very far apart, so gases have a very low density.
How does inertia relate to forces
Answer:
Even in space, objects have mass. And if they have mass, they have inertia. That is, an object in space resists changes in its state of motion. A force must be applied to set a stationary object in motion.
a = 40
B= 75
m = 50 kg
kt=0.3
------------
To which mass of m2 will mass ml go down the hill? What will be the
acceleration of m2 (a)?
On which interval of masses m2 will the system rest/not move?
On which mass m2 will the system go backwards (ml up the hill) What
will be the acceleration of ml (a)?
Solve with II. Newton's law.
Answer:
A DAY IN THE LIFE OF METIS JOURNAL, I WROTE IT HOPE U LIKE IT ;))) XD
We, who live in the west, were Nomadic. So we always moved from place to place to hunt buffalo and other fur-bearing animals. And now again we have to shift everything we collected , like, all the essential needs we collected. It’s really hard to shift stuff, But when you move to a new place you get to see new beautiful places. They are just so satisfying to see! It’s like all my work(like the shifting work) is paid off. I love it! We always meet the Hudson’s bay company employees, and give them furs which we took from the bissons and other furry animals we hunted. And in exchange they give us their (Hudson’s Bay company) goods. Which is good! Because then we or I won't be able to enjoy that delicious pemmican!
The one reason that makes me proud of my parents is that because of them I am like a translator for both sides in the fur trade! Anyways coming back to the present. As I said before, we were moving today to another place, But on the way some people along with my father will ride the famous York boats carrying supplies to fur posts. I begged my father to take me with him! And as usual he gave me some silly reason for me to stay. And now since I don’t have anything to do I will-..Nevermind, My mom’s calling me. Okay after helping my mom keep the fur posts into the York boats me , my mom, and the others are just relaxing and enjoying nature just to take a break. Since, I am so obsessed with my Journal notebook today I’m just going to sit here and right what comes to my mind. I’m not like the others who always seem to be talking with someone. I like my own space!
I kind of miss my dad already, but he and his fellow members need to travel the waterways from the red river further west and north to hudson bay. These red river carts also travel the trek back and forth over land to St. Paul, Minnesota and to posts in saskatchewan. Speaking about the red river, the only large settlement in the region is the red colony. About 12000 people lived in this colony around Fort Garry. Some were the original Selkirk settlers or their descendents. They had come from Scotland with lord Selkirk when he established the colony in 1811. Many of these original settlers were poor farmers who had been displaced from their lands in scotland. They had endured many hardships in the early years of settlement, including foods, hunger, and sickness. I love studying about other colonies, cultures , history etc.
Explanation:
write this as your answer you will get extra marks
A 1.0 kg toy car is released at the top of a frictionless track on the left and rolls off of the track from its right
side ramp. The car starts at a height of 0.80 m, goes through a 0.50 m diameter loop, and exits the ramp at a
height of 0.25 m.
Answer: -5.4
Explanation:
Khan said so
Answer:
2.5 J
Explanation:
What is the change in the car gravitational potential energy from A-B
If a sealed syringe is plunged into cold water, in which direction will the syringe piston slide? *
A) No movement will occur
B) in
C) out
D) The direction cannot be predicted.
Answer:
a
Explanation:
can you help me with my question According to the narrator in Paragraph 3 of "The Celebrated Jumping Frog of Calaveras County," Simon Wheeler's tone throughout his entire tale was A earnest and sincere, B. excited and pressing, C. sad and melancholy,
10. What is the acceleration due to gravity at a location
where a 15.0-kilogram mass weighs 45.0 newtons?
1) 675 m/s2
2) 9.81 m/s2
3) 3.00 m/s2
4) 0.333 m/s2
Ralston had lots of spicy and oily food which triggered heartburn. The doctor prescribed
him Milk of Magnesia.
a. Why did the doctor prescribe milk of magnesia?
b. What is the chemical name of milk of magnesia?
Answer:
A.) The doctor decided to prescribe milk of magnesia because of the mineral Magnesium. Magnesium helps to reduce stomach acid and increases the water in the intestines which helps induce motility in the intestines. Heartburn is caused by stomach acids traveling up into your esophagus which causes that feeling of your heart burning. Milk of magnesia will help soothe this.
B.) The chemical name of milk of magnesia is magnesium hydroxide.
Explanation:
The chemical name of the milk of magnesia is magnesium hydroxide.
An antacid is any substance that is taken to decrease or neutralize the acidity of the gastro intestinal tract. We must note that the gastrointestinal tract is natural acidic.
However, hyperacidity of the gastrointestinal tract could lead to heartburn. This acidity is neutralized using an antacid such as milk of magnesia. The chemical name of the milk of magnesia is magnesium hydroxide.
Learn more about antacid: https://brainly.com/question/1301963
Earl travels 50m east in 10 minutes and later 100m north in 15 minutes. What is her total displacement?all travels 50 m East in 10-minutes and later 100m not in 15-minutes determine the total displacement recovers
Answer:
111.8 m
Explanation:
Displacement is the change in position of an object. The SI unit of displacement is the meters. The displacement of an object can be calculated by determining the shortest distance from the starting point to the end point.
Since earl travels 50 m east and then 100 m north, let x represent the displacement. Therefore x is the shortest distance from starting to end. Earl movement forms a right angled triangle with x as the hypotenuse. Hence:
x² = 50² + 100²
x² = 12500
x = 111.8 m
The wavelength of a wave is 4 metre & its time period is 2 second. What is speed of the wave?
Answer: The speed of wave is 2m/s.
Explanation:
The speed of wave equals to the distance/time. So when we divide 4m and 2s, we get that the speed of wave is 2m/s
What type of pressure is associated with more dense, sinking air?
A.average
B.low
C.high
What is the charge of electron?
Answer:
negative I hope u got ur answer mate
A 0.70kW vacuum cleaner is used for 20 minutes. How much energy does it use? Give your answer in
kWh to two decimal places.
20 minutes = 20/60 = 0.33 hr
0.7 kw * 0.33 hr = 0.231 kWh = 0.23 kWh
Plz mark as Brill
Energy used will be 0.23 kWh
What is Energy ?Energy is the capacity of a physical system to do work . The standard unit of energy is Joule(J).
Energy = power * time
Given :
power = 0.70 kW
time = 20 minutes = 20 / 60 hour
Energy = ?
Energy = 0.70 * (20/60)
= 0.23 kWh
Energy used will be 0.23 kWh
learn more about Energy
https://brainly.com/question/18739636?referrer=searchResults
#SPJ3
If the intensity of sound at a point is 4.33 x 10^-7 W/m^2, what is the sound level there? (Unit = dB)
Answer:
56.4 dB
Explanation:
Threshold of hearing, Ir = 1 * 10^-12
Intensity of sound, I = 4.33 * 10^-7
The sound level, L is calculated thus :
L = 10log(I / Ir)
L = 10log(4.33 * 10^-7 / 10^-12)
L = 10log(4.33 * 10^(-7+12))
L = 10log(4.33 * 10^5)
L = 10 * 5.6364878
L = 56.364878
L = 56.4 dB
A ball is thrown 6m above the ground. Its total energy at that point is 12 J. What is the total energy of the ball at a halfway point of motion
Answer:
6J
Explanation:6J
Using the potential Energy formula;
Potential Energy = mass * acceleration due to gravity * height
If a ball is thrown 6m above the ground. Its total energy at that point is 12 J
Get the mass of the ball
12 = m * 9.8 * 6
m = 12/58.8
m = 0.204kg
The height of the ball halfway = 6/2 = 3m
Potential energy half way = mgh
Potential energy half way = 0.204 * 9.8 * 3
Potential energy half way = 6J
Answer all of them an you will get the brain list
Answer:
4. Force = 178.6 Newton.
5. Acceleration = 2.28 m/s².
6. Force = 178.6 Newton.
Explanation:
4. Given the following data;
Acceleration = 3.8 m/s²
Mass = 47kg
Force = mass * acceleration
Force = 47 * 3.8
Force = 178.6 Newton.
5. Given the following data;
Force = 785N
Mass = 345kg
Acceleration = force/mass
Acceleration = 785/345
Acceleration = 2.28 m/s²
6. Given the following data;
Acceleration = 6m/s²
Force = 32N
Mass =force/acceleration
Mass = 32/6
Mass = 5.33 kilograms
According to Coulomb's law, what happens to the attraction of two oppositely charged objects as their distance of separation increases?
(a) increases (b) decreases
(c) remains uncharged (d) cannot be determined
Answer:
Option B. Decreases
Explanation:
Coulomb's law states that:
F = Kq₁q₂ / r²
Where:
F => is the force of attraction between two charges
K => is the electrical constant.
q₁ and q₂ => are the two charges
r => is the distance apart.
From the formula:
F = Kq₁q₂ / r²
The force of attraction (F) is inversely proportional to the square of their separating distance (r).
This implies that as the distance between them increase, the force of attraction between the two charges will decrease and as the distance between two charges decrease, the force of attraction between them will increase.
Considering the question given above and the illustration given above, the force of attraction will decrease as their distance of separation increases.
Option B gives the right answer to the question.
A girl travels 50 m East in 10-minutes and later 100m north in 15 minutes. what is her total displacement?
Answer:
111.80 meters
Explanation:
Displacement = A^2 + B^2
50^2 + 100^2 = 12 500 (route the answer )
S= 111.80 meters
what does exponential part growth mean?
Answer:
Exponential growth is a pattern of data that shows greater increases with passing time, creating the curve of an exponential function. The population is growing to the power of 2 each year in this case.
Brainliest if right.
Show your work: A wolf chasing an elk. The wolf has a mass of 100 kg and is running with a velocity of 16 m/s
to the right. What is the wolf's momentum?
The elk has a mass of 180 kg. What does the elk's speed have to be for it to have the same momentum as the
wolf?
Answer:
Wolf=1600kg*m/s
Elk= 8.89 m/s
Explanation:
p=mv
p=100*16
p=1600
1600=180*v
v=8.89 m/s
I think this is physics but I just need someone to help me match the vocab plz
Answer:
1 - b
2 - e
3 - d
4 - a
5 - c
Way back in the _____________, there lived a man named Isaac Newton who really loved physics.
Group of answer choices
15th to 16th century
17th to 18th century
20th to 21st century
1st to 2nd century
Answer:
i can't click the answer bottom but the answer is "17th to 18th century" i hope this helps
Can someone tell me what all these mean in pe pls I’m confused on what they mean all of them