Explanation:
Mostly in metamorphic or lava materials is uranium-238 contained. Then no fossil could be estimated utilizing U 238 specifically. They should never be used combined due to the huge variations in the half-life of Carbon 14 with Uranium-238. It is only possible to be using carbon 14 to classify fossil from a very current generation.
Nikolas, the fire extinguisher, and the skateboard have a combined mass of 50 kg. What force would the fire extinguisher have to produce to propel Nikolas if he wanted to accelerate at a rate of 1.2 m/s2? Round your answer to the nearest whole newton.
Answer:
60N
Explanation:
Given parameters:
Combined mass = 50kg
Acceleration = 1.2m/s²
Unknown:
Force to propel = ?
Solution:
From Newton's second law of motion, we know that;
Force = mass x acceleration
So;
Force = 50 x 1.2 = 60N
Answer:
60N
Explanation:
Electromagnetic Field concept was observed and discovered by whom?
Answer:
James Clerk Maxwell
Who observed and discovered the electromagnetic field concept? Many physicists experimented with electromagnetic fields, but it was James Clerk Maxwell who discovered that they are actually electromagnetic in nature and they (at the classical level) are accurately described by his famous equations.
Explanation:
if a 580 N net force acts on a 40 kg what will the acceleration of the car be
Answer:
I think u have to do 580N times 40KG
Answer: DONT MULTIPLY, YOU DIVIDE THEM
Explanation:
F = mass x acceleration
580 N = (40 kg)(a)
580/40 = 14.5
a = 14.5 m/s²
5. It takes you 5 hours to complete a 375-kilometer trip. What was your average speed on this trip?
Answer:
the average speed on this trip is 75 km/h
Answer:
75 km/h
Explanation:
How would the elastic potential energy change if the displacement is multiplied by five?
Answer: Work is done when a spring is extended or compressed . Elastic potential energy is stored in the spring. The elastic potential energy stored can be calculated using the equation: elastic potential energy = 0.5 × spring constant × (extension) 2.
Explanation: can you please mark me as brainliest
How is the kinetic energy of molecules changing when the molecules move faster? The kinetic energy . . .
Answer:
Particles move rapidly in all directions but collide with each other more frequently than in gases due to shorter distances between particles. With an increase in temperature, the particles move faster as they gain kinetic energy, resulting in increased collision rates and an increased rate of diffusion
Explanation:
A wave with a frequency of 32 Hz has a wavelength of 9 meters. At what speed will this
wave travel?
Answer:
228 m/s
Explanation:
f = 32 Hz
λ = 9 m
v = ?
v = f λ
v = (32 Hz) (9 m)
v = 288 m/s
2 Select the correct answer. How many points are awarded for a soccer goal? OA. OB. 2 OC. 3 O D. 7
Answer: oa
Explanation:
A force of 90.0 newtons is applied to a cart traveling at 15.0 meters per second. After
the force has been applied for 2.00 seconds, it comes to rest. What is the magnitude
of the impulse applied to the cart over these 2.00 seconds?
Answer:
180Ns
Explanation:
Given parameters:
Force applied = 90N
Velocity = 15m/s
Time taken = 2s
Unknown:
Impulse applied to the cart = ?
Solution:
The impulse is effect of force acting on a body through time.
It is mathematically expressed as;
Impulse = Force x time
So;
Impulse on the car = 90 x 2 = 180Ns
A train is moving with a velocity of 70 km/h.
If north is taken as the positive direction, what is the direction of movement of the train?
It is moving north but is speeding up. ,
It is moving north. ,
It is moving south.
It is moving south but is speeding up.
Answer:
B: It is moving north.
Explanation:
We are told that a train is moving with a velocity of 70 km/h.
Now, we are also told that the positive direction is north.
This means that the train is moving in the northern direction.
We can't say if it is speeding up or not because we are not given the acceleration.
Thus, option B is correct
Answer:
It is moving north.
Explanation:
I took the test.
A book on a shelf 2.0 meters above the floor has a mass of 1.5 kilograms. What is the gravitational potential energy of the book?
Answer:
29.4 J
Explanation:
PE= MGH
PE = 1.5 x 2x 9.8
A 60 W bulb is supplied with 36 000 j of energy how long is the bulb on for
Answer:
Time = 600 seconds
Explanation:
Given the following data;
Power = 60W
Energy = 36000
To find the time;
Energy = power * time
Substituting into the equation, we have;
36000 = 60 * time
Time = 36000/60
Time = 600 seconds.
Therefore, the bulb was on for 600 seconds.
Which particle is a negatively charged ion?
A.Hydrogen (H) with 1 proton, 0 neutrons, and 1 electron
B.Sodium (Na) with 11 protons, 12 neutrons, and 10 electrons
C.Magnesium (Mg) with 12 protons, 12 neutrons, and 12 electrons
D.Chlorine (CI) with 17 protons, 18 neutrons, and 18 electrons
Answer:
option D is correct
Explanation:
cl has 17 electrons if it has 18 it becomes cl-
The particle that is negatively charged is Chlorine (CI) with 17 protons, 18 neutrons, and 18 electrons. The correct option is D.
What is an ion?An ion is a gross electrically charged molecule or atom. By convention, the charge of an electron is considered to be negative, and this charge is equal to and opposite to the charge of a proton, which is considered to be positive.
These are found in a wide range of instruments, including mass spectrometers, optical emission spectrometers, particle accelerators, ion implanters, and ion engines.
They are also used in air purification by disrupting microbes, as well as in household items such as smoke detectors, as reactive charged particles.
When particles acquire or lose electrons, ions form. Because electrons are negatively charged, losing one or more electrons causes an atom to become positively charged; gaining one or more electrons causes an atom to become negatively charged.
Thus, the correct option is D.
For more details regarding ions, visit:
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A block is on a surface with µs=0.276. It takes 1.11 N to break it free from static friction. What is the mass of the block?
Answer:
0.407 kg
Explanation:
Given :
Coefficient of static friction, µs = 0.276
Force, F = 1.1 N
Using the relation :
μ = F/N
N = normal reaction ; N = mg
μ = F / mg
g = acceleration due to gravity = 9.8 m/s²
0.276 = 1.1 / m * 9.8
0.276 = 1.1 / 9.8m
0.276 * 9.8m = 1.1
2.7048m = 1.1
m = 1.1 / 2.7048
m = 0.4066844
Mass = 0.407 kg
A bullet with a mass of 0.3 kg is fired out of a gun with a mass of 4 kg at 600 m/s. What is the recoil velocity on the gun?
200 m/s
45 m/s
2400 m/s
90 m/s
Answer:
According to the Conservation of Momentum,
Momentum of the gun = momentum of the bullet
M(gun)×V(gun)=m(bullet)×v(bullet)
4kg × V = 0.3kg × 600m/s²
V = (0.3 × 600)/4 = 45 m/s
The recoil velocity on the gun is 45 m/s
45 m/s is the right answer.a submarine is observed to rise from a real depth of 80 m to 60 m in water calculate the change in apparent depth
Answer:
15m
Explanation:
change in real depth = 80 - 60 = 20m
Let us assume that the index is 4/3
Refractive index = change in real depth ÷ change in apparent depth
change in apparent depth = change in real depth÷ refractive index
= 20÷(4/3) = 20×(3/4) = 5×3 = 15m
ASAP Will give brainlist . As a scientists have learned more about atoms , models of atoms have changed. One of the first atomic was a solid ball , such as a marble .
What are two limitations of using a marble to model an atom?
A - The model is not made of commonly available materials or objects.
B - The model does not move or behave like a real atom.
C - The model does not show the true size of an atom.
D - The model is much harder to see than a real atom.
Answer:
B - The model does not move or behave like a real atom.
Explanation:
The solid ball does not show how the nucleus is composed of protons and neutrons, or the relationship between the electrons and the nucleus.
What should a person do to reduce the risk of developing osteoporosis if it runs in the family?
Regularly engage in weight-bearing activities.
Decrease warm-up time before workouts.
Consume more red meat and high-fat foods.
Increase cool-down time after workouts.
Answer:
The actual answer would be A: Regularly engage in weight-bearing activities
Explanation:
Evidence can be seen in this article about osteoporosis-
What is newton first law
Answer:
Newtons first law states that:
If a body is in rest or motion in a straight line, it remains at rest or at motion in a straight line with constant speed until and unless and external unbalanced force acts on it.
'This law is also known as the law of Inertia.'
A saturated solution is formed by keeping 48 gram of a salt in 200 gram of water at 35°C. calculate the solubility of the salt.
The solubility of the salt. : 24 g/100 g solvent(water)
Further explanationGiven
48 gram of a salt in 200 gram of water at 35°C
Required
The solubility of the salt.
Solution
Solubility : the amount of a substance that can be dissolved in a solvent
Can be formulated(for 100 g solution)⇒grams solute per 100 g of solvent(100 ml water)
[tex]\tt solubility=\dfrac{mass~solute}{mass~solvent}\times 100[/tex]
Input the value :
[tex]\tt solubilty=\dfrac{48~}{200~g}\times 100=24~g[/tex]
• CHALLENGE You need to move a 105-kg sofa to a different location in the room. It
takes a 403-N force to start the sofa moving. What is the coefficient of static friction
between the sofa and the carpet?
Answer:
μ = 0.391
Explanation:
The friction force is defined as the product of the coefficient of friction by the normal force. In this way, we have the following equation.
F = μ*N
Where:
F = friction force = 403 [N]
μ = static coefficient
N = Normal force [N]
And the normal force of a body lying on a horizontal surface can be calculated by means of the product of mass by gravitational acceleration.
[tex]N=m*g\\N=105[kg]\\g=9.81 [m/s^{2} ]\\N=105*9.81\\N=1030.05[N][/tex]
Now we can clear the static coefficient
[tex]403=u*1030.05\\u=0.391[/tex]
What is the net force on the block shown above?
50 N Up
50 N Down
0 N
5 N Down
Answer:
50 N UP
Explanation:
[tex]F_{g} = 150[/tex]
to
[tex]F_{n} = 200[/tex]
Is adding 50 which means you are going up.
Hope this helped!
Have a supercalifragilisticexpialidocious day!
How much heat does it take to bring 0.12 kg of liquid water at 100c to steam at 140c
Answer:
162
Explanation:
DEFINE MOMENTUM . EXPLAIN THE OF CONSERVATION OF MOMENTUM WITH THE HELP OF EXAMPLE
Answer:
Momentum, product of the mass of a particle and its velocity. Momentum is a vector quantity; i.e., it has both magnitude and direction.
In handball, once a player possesses the ball,
how many steps are they allowed to take?
How does this help with the speed of the
game?
Answer:
If possessing the ball, players must dribble (not similar to a basketball dribble), or can take up to three steps for up to three seconds at a time without dribbling. No attacking or defending players other than the defending goalkeeper are allowed to touch the floor of the goal area (within six metres of the goal).
Explanation:
I HOPE THIS HELPS*
The force of friction between an object and the surface upon which it is sliding is 14N and the coefficient of friction between them is 0.72. What is the weight of the object?
Answer:
14 x 0.27 = 3.78 is your answer
Explanation:
the question is asking for the weight of the object so you multiply and get 3.79
A 40 kg dog is sitting on top of a hillside and has a potential energy of 1,568 J. What is the height of the hillside? (Formula: PE = mgh)
3.9 m
4.0 m
39.2 m
40.0 m
Answer:
The answer is 4.0 m
Explanation:
Answer:
B) 4.0
Explanation:
Jus took the test on E D G E
How can you confirm/show that decay is exponential? (when talking about damped oscillations) What is responsible for the damping force? Why?
Answer:
Following are the solution to this question:
Explanation:
In this question, it is usually designing the question with difference calculus but instead demonstrate there is an empirical term for both the answer of a nonlinear equation is the decay, Throughout the preliminary training programs, the origin of a damping word is usually resistance or Rossiter.
A student rides the Ferris wheel when visiting an amusement park. During the ride,
she moves at a constant speed of 3 m/s.
Which of the following statements best describes the motion of the student on the
Ferris wheel?
Answer: the velocity is not changing bc the speed is constant
Explanation:
A student rides the Ferris wheel when visiting an amusement park. She moves at a constant speed of 3 m/s which means that the velocity is not changing because the speed is constant.
What are Average Speed and Average Velocity?The overall distance the object covers in a given amount of time is its average speed. The scalar quantity represents the average speed. It does not have direction; it is represented by magnitude.
Average Speed = [tex]total\ distance/total\ time[/tex]
Average velocity is a vector quantity. The change in position or displacement divided by the periods during which the displacement happens is known as average velocity. Depending on how the displacement is displaced, the average velocity may be positive or negative. Meters per second (m/s), the SI unit of average velocity, is used.
According to the question, she is moving at a constant speed of 3 m/s means that the velocity is constant, and its acceleration will also be equal to zero because there is no change in velocity then acceleration is zero.
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If the force of a 10 kg car traveling in a circular path is 900n and the circle has a diameter of 20 m what is the velocity of the car
Answer:
the velocity of the car is 30 m/s.
Explanation:
Given;
Centripetal force on the car, F = 900 N
mass of the car, m = 10 kg
diameter of the circular path, d = 20 m
radius of the circular path, r = 10 m
The velocity of the car is calculated as follows;
[tex]F = \frac{mv^2}{r} \\\\mv^2 = Fr\\\\v^2 = \frac{Fr}{m} \\\\v = \sqrt{\frac{900 \times 10}{10} } \\\\v = 30 \ m/s[/tex]
Therefore, the velocity of the car is 30 m/s.
