Answer:
An atom of fluorine has the atomic number 9, and its mass number is 19 amu. Which of the following shows a neutral atom of fluorine? 16 protons and 14 electrons.
Explanation:
ITs 16 protins and 14 ELECTRONS
Answer:
Answer is 9 Protons, 10 Neutrons, and 9 Electrons
Explanation:
A.P.E.X
Which of the following statements would be accepted as a valid criticism of
the big bang theory in scientific circles?
A. It cannot be tested directly.
B. It does not explain how stars are clustered.
C. It can be revised at a later date.
0
D. It is just an educated guess.
Answer:b
Explanation:
The statement B would be accepted as a valid criticism of the Big Bang Theory in scientific circles, It does not explain how stars are clustered.
What is Big Bang Theory?The Big Bang hypothesis is the most widely accepted cosmological model for describing the origins of the observable universe and its subsequent large-scale development.
Statements would be accepted as a valid Big Bang Theory in scientific circles is that it does not explain how stars are clustered.
Hence, option B is correct.
To learn more about the Big Bang Theory, refer to the link;
https://brainly.com/question/1160650
#SPJ2
Why is it very dangerous
for the driver and
passengers if any bubbles of gas get into
the brake fluid? Even worse what would go wrong if the break fluid leaked out of its pipes?
Answer:
If it leaks....
If there is a brake fluid leak and air gets mixed with the fluid in the brake lines, then the fluid will not be able to flow correctly. As a result, when you press your foot down on the brake pedal, it will feel squishy or spongy. In other words, the brake pedal will feel very soft.
If air bubbles get into....
Air is the enemy in a hydraulic system because it reduces pressure and essentially makes the process less effective. When air gets into the brake lines, your brake system suffers. Symptoms that can indicate you have air in your brake lines include the following: Brake pedal feels spongy when you press down
Hope it helps!!!!
a lorry has a mass of 32000 kilograms. each tyre has an area of 400 cm squared in contact with the ground. calculate the pressure exerted on the ground if the lorry has 6 tyres
Answer:
Your answer is 1306666.6667 Pascal
The s.I unit of R so that the equation velocity= R × density S dimensionally correct R is a constant
Answer:
R = m⁴/kg . s
Explanation:
In this case, the best way to solve this is working with the units in the expression.
The units of velocity (V) are m/s
The units of density (d) are kg/m³
And R is a constant
If the expression is:
V = R * d
Replacing the units and solving for R we have
m/s = kg/m³ * R
m * m³ / s = kg * R
R = m * m³ / kg . s
R = m⁴ / kg . sThis should be the units of R
Hope this helps
_____ are both ways of preserving current energy resources.
1.Increasing efficiency and energy conservation
2.Removing insulation and using incandescent bulbs
3.Energy conservation and removing insulation
4.Using incandescent bulbs and increasing efficiency
Answer:
4
Explanation:
I think if not. I am sorry
Answer: 1
Explanation: sorry im late
Can Someone Please Help Me For 10 Points.
John steps outside and observes that clouds have started to form in the sky, and it looks like it could rain. Which of the following is the best way to explain why the clouds have formed?
A. The temperature of the air is below zero.
B. There is a low amount of moisture in the air.
C. The warm, wet air in a low pressure system has risen up and cooled down.
D. The wind is traveling at a slow speed.
Answer: C
Explanation: The warm, wet air in a low pressure system has risen up and cooled down.
Please give Brainliest if you can!
Answer: C
Explanation: When John stepped outside, he saw the clouds because the warm, wet air in a low pressure system has risen up and cooled down. This is what will fall down as rain fall.
4. What is the period of the microwaves in the above question?
Answer:
The period of a wave is the time for a particle on a medium to make one complete vibrational cycle. Period, being a time, is measured in units of time such as seconds, hours, days or years. The period of orbit for the Earth around the Sun is approximately 365 days; it takes 365 days for the Earth to complete a cycle.
3. A train covers 168 km in 4 hours. How much distance will it cover in 80
minutes?
Answer:
56km
Explanation:
168 ÷ 240 = 0.7
0.7 × 80 = 56km
240 is the amount of minutes in 4 hours.
We divided 168 by 240 to get the distance covered in 1 minute. Afterwards, we needed 80 minutes so we multiplied the answer by 80.
When forces of 5 N and 7 N respectively act on an object. When will the resultant of the two vectors be at a maxium
Answer:
F = 12 N
Explanation:
Given that,
Force of 5 N and 7 N respectively act on an object.
We need to find the resultant of the two vectors be at a maximum.
Force will be maximum when two forces acts in same direction. It means we can simply add them i.e.
F = 5 N + 7 N
F = 12 N
Hence, the resultant force is 12N.
The 4.0 -kg head of an ax is moving at 3 m/s when it strikes a log and penetrates 0.01m into the log. What is the average force the blade exerts on the log?
Answer:
the average force the blade exerts on the log is 1791.05 N.
Explanation:
Given;
mass of the ax head, m = 4 kg
speed of the ax, v = 3 m/s
depth traveled into the log, d = 0.01 m
The time to traveled through the depth;
[tex]s = (\frac{u+v}{2} )t\\\\0.01 = (\frac{0+3}{2} )t\\\\0.01 = 1.5t\\\\t = \frac{0.01}{1.5} \\\\t = 0.0067 \ s[/tex]
The average force the blade exerts on the log;
[tex]F = ma=\frac{mv}{t} = \frac{4 \times 3}{0.0067} = 1791.05 \ N \\\\[/tex]
Therefore, the average force the blade exerts on the log is 1791.05 N.
If 2,575J of heat is added to a 250g piece of silver, the change in temperature of the silver will be 43.6 °C? What is the specific heat of of silver
Answer:
58.56°C
Explanation:
Brrrrrrrrrrrrrr
Answer:
0.236 C
Explanation:
A car accelerates from rest to 90km/hr in 10 seconds. what is its acceleration in m/s2
Answer:
[tex]2.5m/s^2[/tex]
Explanation:
v = 90km/h = 90000m/h = 1500m/min = 25m/s
a = v/t
a = 25m/s / 10s = [tex]2.5m/s^2[/tex]
Which element on the periodic table fights dandruff, directs drivers, and makes copies of your homework?
Answer:
Talc is the known mineral
The distance between two particles is 2 centimeters. If the distance is increased to 4 centimeters, the force will be ?
Answer:
The new force is 1/4 of the previous force.
Explanation:
Given
[tex]Initial\ Distance = 2cm[/tex] ---- [tex]r_1[/tex]
[tex]New\ Distance = 4cm[/tex] --- [tex]r_2[/tex]
Required
Determine the new force
Let the two particles be q1 and q2.
The initial force F1 is:
[tex]F_1 = \frac{kq_1q_2}{r_1^2}[/tex] --- Coulomb's law
Substitute 2 for r1
[tex]F_1 = \frac{kq_1q_2}{2^2}[/tex]
[tex]F_1 = \frac{kq_1q_2}{4}[/tex]
The new force (F2) is
[tex]F_2 = \frac{kq_1q_2}{r_2^2}[/tex]
Substitute 4 for r2
[tex]F_2 = \frac{kq_1q_2}{4^2}[/tex]
[tex]F_2 = \frac{kq_1q_2}{4*4}[/tex]
[tex]F_2 = \frac{1}{4}*\frac{kq_1q_2}{4}[/tex]
Substitute [tex]F_1 = \frac{kq_1q_2}{4}[/tex]
[tex]F_2 = \frac{1}{4}*F_1[/tex]
[tex]F_2 = \frac{F_1}{4}[/tex]
The new force is 1/4 of the previous force.
2. David roller skates 15 miles in 75 minutes. What is his average speed in miles per hour?
1
1.Energy is used when a force acts over a.....................
.................................................
2.All objects have the same weight have:
a)the same place on Earth
b)the same mass
c)the same volume
d)pull of gravity on them
Answer:
the same mass answer b) but i dont know first question
For the element 35 17 C1, give the number of... 1. protons 2. neutrons 3. electrons
Answer:
Chlorine 35:
Atomic mass 35.43
Number of protons 17
Number of electrons: 17
Number of neutrons: 18
Explanation:
chose the one with more potential energy: a 25kg bear or a 30kg bear in a tree?
Answer:
a 30kg
Explanation:
a 30kg
1. A 1000 kg bag of sand has an
acceleration of 0.5m/s/s. What is the
force on the bag?
Answer:
We conclude that the force on the bag is 500 N.
Explanation:
Given
Mass m = 1000 kgAcceleration a = 0.5 m/s²To determine
Force F = ?
We know that when a force is applied to a body, it produces acceleration.
Important Tip:
We can determine the force on the bag using the formula F = maUsing the formula
[tex]F = ma[/tex]
where
[tex]F[/tex] is the force [tex]m[/tex] is the mass[tex]a[/tex] is the accelerationnow substitute m = 1000, and a = 0.5 m/s² in the formula
[tex]F = ma[/tex]
[tex]F = (1000)(0.5)[/tex]
[tex]F=500[/tex] N
Therefore, we conclude that the force on the bag is 500 N.
Construct arguments based on evidence about the applications, benefits, and problems of nuclear energy as an alternative energy source.
Answer:
Explanation:
Clean Energy Source It generates more than 800 billion kilowatt hours of electricity each year and produces more than half of the nation's emissions-free electricity. This avoids more than 470 million metric tons of carbon each year, which is the equivalent of removing 100 million cars off of the road.
If I'm wrong I'm sorry
If I'm right thank you and (brainliest plz)
What is the critical angle for a ray trying to pass from glass (n = 1.52) into water (n = 1.33)? (Water n = 1.33, Air n = 1.00) (Unit = deg)
Answer:
59.52
Explanation:
59.5 in sigfigs
got it right on Acellus
Answer:
61.05
Explanation:
correct on acellus
SCIENCE
What does the nucleus of the cell control?
A. Life functions
B. Cell transport
C. Waste excretion
D. Energy production
Answer:
I believe A would be the best answer
Explanation:
Cell transport means things entering and leaving the cell, this would be controlled by the cell membrane
Waste excretion is controlled by the vacuole
Energy production is the mitochondria (the mitochondria is the power house of the cell)
Life functions include cellular reproduction and the nucleus contains the genetic information to do this
Answer:
a
Explanation:
If a wave has a length of 1.2 m and a speed of 2000 m/s, what is the frequency?
Answer:
2400 Hz
Explanation:
frequency = speed × lenght of the wave
Newton's Law of Gravity states that if the mass of one object doubles, the gravitational pull on a second object will
____.
doubles
decreases by half of half
quadruples
decreases by half
Answer:
It will double.
Explanation:
Newton's Law of Gravity states that [tex]F_G=\frac{Gm_1m_2}{r^{2}}[/tex], where G is the gravitational constant, r is the distance between the objects' centers, and [tex]m_1[/tex] and [tex]m_2[/tex] are the objects' masses. We just have simple math here: by doubling [tex]m_1[/tex], we double the entire fraction. By doubling the entire fraction, we double the gravitational pull. Therefore, Newton's Law of Gravity states that if the mass of one object doubles, the gravitational pull on a second object will double.
I hope this helps you understand it! Have a great day, 'kay?
Answer:
It doubles.
If the mass of one of the objects is doubled, then the force of gravity between them is doubled. Since the gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces.
Sort the balloons based on the kinds of charges they carry.
first one is negative
second is none
third is posotive
last one is negative
left to right order
Answer:
Explanation:
thats the answer
What if we minned astroids
Which is a device that stores electric charge by separating positive and negative charges?
O a conductor
O a dielectric
O a resistor
O a capacitor
Answer:
The last one, a capacitor
Explanation:
Right on edge.
Explain how a chain reaction is sustained.
Answer:
The chain reaction requires both the release of neutrons from fissile isotopes undergoing nuclear fission and the subsequent absorption of some of these neutrons in fissile isotopes. Thus, the cycle repeats to give a reaction that is self-sustaining.
Which part of the drum vibrates when it produces sound?
Explanation:
For example, when a drum is struck, the flexible skin (sometimes called a membrane) of the drum vibrates. The compression and expansion of the air on either side of the vibrating membrane produces differences in air pressure. The pressure differences generate a sound wave that propagates outward from the drum surface.
Which of the following is an example of the transformation of gravitational potential energy into motion energy (kinetic energy
A tire rolling along a level floor
A ball going up after being tossed into the air
gley
ve
A drop of water falling from a faucet into a sink
None of these because gravitational potential energy cannot be transformed into motion energy
Answer:
A drop of water falling from a faucet into a sink