Answer:
For any given isotope, the sum of the numbers of protons and neutrons in the nucleus is called the mass number. This is because each proton and each neutron weigh one atomic mass unit (amu). By adding together the number of protons and neutrons and multiplying by 1 amu, you can calculate the mass of the atom.
a plane is traveling at a velocity of 50 m/s. it accelerates at a constant rate of 0.5 m/s until it's velocity reaches 65 m/s. what distance did the plane cover while it was accelerating?
Answer:
Displacement = 1725m
Explanation:
[tex]t = \frac{u-v}{a}[/tex]
[tex]t = \frac{65-50}{0.5} = 30s[/tex]
[tex]s = ut+\frac{1}{2}at^{2} \\s = 50*30 + \frac{1}{2} *0.5*30^{2} = 1725m[/tex]
The speed of sound in human tissue is about 1600 m/s. If an ultrasound pulse takes
1.5 x 10--s to travel through a tissue, what is the thickness of the tissue in mm?
Answer:
The thickness of the tissue is : 2.4 x 10⁷ mm
Explanation:
The general formula for speed is the distance travelled divided by the time taken.
In this case,
Speed = 1600 m/s ------speed of sound in human tissue
Time = 1.5 * 10 seconds -----time of taken for the ultrasound pulse to go through a certain thickness of a tissues
The thickness of the tissue here is the distance as per the speed formula, hence;
Tissue thickness = Speed of sound * time taken by ultrasound pulse
Tissue thickness= 1600 * 1.5*10 =24000 m
1 m= 1000 mm
24000m = 24000*1000 mm
= 2.4 x 10⁷ mm
The _____ leads from the pharynx towards the lungs
SPEED THAT
INCLUDES THE
DIRECTION is ____
Answer:
Velocity
Explanation:
Levi decides to examine the effect of fertilizer on the growth of tomato plants. He chooses four plants for his experiment and applies varying amounts of fertilizer to three of them. He does not apply fertilizer to one plant.
Over a 15-day period, the plants receive fertilizer on Days 1, 4, 7, 10, and 13. Levi measures the height of all of his plants with a meter stick on days 3, 6, 9, 12, and 15. He also makes sure to hold all experimental factors constant except for the fertilizer.
Where should the independent and dependent variables of Levi's experiment be placed when graphed?
Select all that apply.
the amount of fertilizer; y-axis
plant height; y-axis
the amount of fertilizer; x-axis
plant height; x-axis
Explanation:
Over a 15-day period, the plants receive fertilizer on Days 1, 4, 7, 10, and 13.
Levi measures the height of all of his plants with a meter stick on days 3, 6, 9, 12, and 15.
Independent variable is the amount of fertilizers given to the plants. The height of the plant depends on the amount of the fertilizers. It is the dependent variable.
On x-axis : The amount of fertilizer
On y -axis : Plant height
What is the velocity of an object moving 10 m in 5 seconds to the right?
Explanation:
The velocity of an object can be found by using the formula
[tex]v = \frac{d}{t} \\ [/tex]
d is the distance
t is the time taken
From the question we have
[tex] v = \frac{10}{5} \\ [/tex]
We have the final answer as
2 m/sHope this helps you
A Nerf gun is shot straight up from the ground with an initial velocity of 14.0 m/s. What is the total time the projectile is in the air?
PLEASE SHOW WORK WILL MARK BRAINLIEST
The projectile has a height h at time t given by
h = (14.0 m/s) t - 1/2 g t ²
where g = 9.80 m/s² is the magnitude of the acceleration due to gravity. Solve for t when h = 0 :
0 = (14.0 m/s) t - 1/2 g t ²
0 = 1/2 t (28.0 m/s - g t )
1/2 t = 0 or 28.0 m/s - g t = 0
The first equation says t = 0, which refers to the moment the gun is first fired, so we ignore that solution. We're left with
28.0 m/s - g t = 0
t = (28.0 m/s) / g
t = (28.0 m/s) / (9.80 m/s²)
t ≈ 2.86 s
If a car moves with a uniform speed of 2m/s in a circle of radius 0.4m, what is its angular speed?
Answer:
The car's angular speed is [tex] \frac{rad}{s}[/tex].
Explanation:
Angular velocity is usually measured with [tex]\frac{radians}{sec}[/tex], so I'm going to use that to answer your question.
The relationship between tangential velocity and angular velocity (ω) is given by:
[tex]V = \omega R[/tex]
Using the values from the question, we get:
[tex]2 \frac{m}{s} = \omega (0.4m)[/tex]
[tex]\omega = 5 \frac{rad}{s}[/tex]
Therefore, the car's angular speed is [tex]5 \frac{rad}{s}[/tex].
Hope this helped!
if a 78.2 kg kangaroo weighs 6742 N on the planet katar, calculate katar's radius
Answer:
about 7500 km
Explanation:
The mass of planet Katar is 7.27×10^25 kg. The force on the kangaroo is given by ...
F = GmM/r^2
Solving for r, we have ...
r = √(GmM/F) = √(6.67×10^-11 × 78.2 × 7.27×10^25 / 6742) ≈ √(5.62×10^13)
This is in meters, so the radius in km is about ...
r ≈ 7500 km
Please helpppppp!!!!
Write the correct number of EACH element below each of the following compounds:
C6H12O6
2 H2O
(OH)4
3 C2(SO4)2
3 NaCl
Which processes most contribute to soil formation? plz do it all i will give brailest and thanks to best answer
An object has a mass of 4kg and experiences a gravitational force of 40N. If the object experiences no other forces, what will its acceleration be?
What do you need to FIND?
Force Mass Or Acceleration
What do you KNOW? (For the KNOW step you will need to identify which variable is being described by each value in the problem.)
What is the ANSWER?
Answer:
Acceleration,10
Explanation:
First 4kg is your mass,
Second 40N is your force
,so you need your acceleration
The answer is 10 because
F=40N
M=4kg
A=10
You divide 40 out of 4 and you get 10
HOPE THIS HELPS:)
Pls mark brainly
During an adiabatic process in a closed system, what happens to a gas when the gas expands?
It's temperature increases
It’s temperature decreases
It’s molecules gain mass
It’s molecules lose mass
Answer:
the answer is B. the temperature decreases
Explanation:
I got it right.
The process in which the net heat transfer is equal to zero is known as the adiabatic process. During an adiabatic process in a closed system when the gas expands its temperature decreases.
What is an adiabatic process?An adiabatic process is a thermodynamic process in which there is no heat transfer between the system and surroundings. Hence the net heat transfer is equal to zero.
It is given by ΔQ=0.
The temperature in a closed system occurs due to the movement or collision of atoms in the system. As the gas expands the atoms have enough space due to which collision decreases.
Hence during an adiabatic process in a closed system when the gas expands its temperature decreases.
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Chris threw a basketball a distance of 27.5 m to score and win his
high school basketball game. If the shot was made at a 50.0° angle
above the horizontal, what was the initial speed of the ball?
Answer:
v₀ = 16.55 m/s
Explanation:
This motion of the ball can be modeled as a projectile motion with following data:
R = Range of Projectile = 27.5 m
θ = Launch Angle = 50°
g = acceleration due to gravity = 9.81 m/s²
v₀ = Initial Speed of Ball = ?
Therefore, using formula for range of projectile, we have:
[tex]R = \frac{v_{0}^2\ Sin2\theta}{g}\\\\v_{0}^2 = \frac{Rg}{Sin2\theta}\\\\v_{0}^2 = \frac{(27.5\ m)(9.81\ m/s^2)}{Sin100^o}\\\\v_{0} = \sqrt{273.93\ m^2/s^2}[/tex]
v₀ = 16.55 m/s
What has happened to the block of material next to the magnet?
A. The entire block next to the magnet has been magnetized.
B. The end of the block farthest from the magnet has been
magnetized.
C. The end of the block closest to the magnet has been magnetized.
D. The middle of the block next to the magnet has been magnetized.
The end of the block closest to the magnet has been magnetized. this happened to the block of material next to the magnet. Hence option C is correct.
A magnetic field creates a magnetic moment inside ferromagnetic materials like iron when it interacts with the substance. The magnetic moment lines up with the magnetic field outside.
The end of the material block closest to the magnet will encounter the greatest magnetic field and become magnetised in this situation since the magnet is placed near to the material block.
The farthest end of the block would have the smallest magnetic impact since the magnetization diminishes as you get farther from the magnet.
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Describe binary fission with amoeba.
Which of the following can happen to energy?
A. It can be converted to other forms, created, and destroyed.
B. It can be created.
C. It can be destroyed.
D. It can be converted to other forms.
PLEASE HURRY
You will need the following items: a rope about 10 to 20 meters long, a meter or yard stick, a watch that records seconds, and a helper. Tie one end of the rope to a doorknob or other secure object at about waist height. Have your helper take one end of the rope and whip it up and down, while you watch. Answer the questions below.
What type of wave was created? How do you know?
Estimate the wavelength of the wave produced.
Estimate the frequency of the wave produced. This is most easily estimated by counting the number of waves that pass the measuring device within a particular time interval as measured on your watch, or by counting the number of times the hand is shaken up and down.
Compute the velocity of your wave.
Answer:
1. The wave created is a transversal wave because the medium goes up and down. (I used what someone put in the comments because it's correct.)
2. 20 Meters
3. 60 Hz (Hertz)
4. 1200m/s
Explanation:
Not sure if all of this is correct, but I did this assignment so..
Please mark me brainliest. I answered all questions.
What is the biggest muscle in the human body?
A: Glutes Maximas
B:
the answerrrrr isssssss A. gluteus maximus
Answer:
i heard my doctor say glutes, so i choose a
Explanation:
When illuminated with monochromatic light, a double slit produces a pattern that is a combination of single-slit diffraction and double-slit interference. This can be easily seen if the separation between the slits and the size of slits are related by simple fractions. Find the ratio of the width of the slits to the separation between them, if the first minimum of the single slit pattern falls on the fifth maximum of the double slit pattern.
Answer:
The ratio is [tex]k:d = 1 : 5[/tex]
Explanation:
From the question we are told that
The first minimum of the single slit pattern falls on the fifth maximum of the double slit pattern.
Generally the condition for constructive interference for as single slit is
[tex]ksin(\theta) = n\lambda[/tex]
Here k is the width of the slit and n is the order of the fringe and for single slit n = 1 (cause we are considering the first maxima)
Generally the condition for constructive interference for as double slit is
[tex]dsin\theta = m\lambda[/tex]
Here d is the separation between the slit and m is the order of the fringe and for double slit m = 5 (cause we are considering the first maxima)
=> [tex]dsin\theta = 5\lambda[/tex]
So
[tex]\frac{ksin(\theta)}{dsin(\theta)} = \frac{\lambda}{5\lambda}[/tex]
=> [tex]\frac{k }{d} = \frac{1}{5}[/tex]
So
[tex]k:d = 1 : 5[/tex]
A. What is the decay constant for Polonium-212 if the half-life is 299x10-9 s?
Answer:
2.318·10^6
Explanation:
You want to find k such that ...
e^-k = (1/2)^(1/(299·10^-9))
-k = ln(1/2)/(299·10^-9)
k = ln(2)/(299·10^-9) ≈ 2.318·10^6
A circuit constructed on a circuit board is shown below.
Which of the following schematic circuits correctly represents the circuit shown?
Answer:
see attached
Explanation:
The drawing shows a battery connected to two lamps in series. There is no switch in the circuit. The schematic below reflects this.
Micah knows that a car had a change in velocity of 15 m/s. What does Micah need to determine acceleration.
distance
time
direction
speed
Answer:
the answer is TIME
Explanation:
This question involves the concepts of acceleration, time, and velocity.
Micah needs "time" to determine acceleration.
Acceleration is defined as the rate of change of velocity. Mathematically,
[tex]a=\frac{\Delta v}{t}[/tex]
where,
a = acceleration
Δv = change in velocity
t = time interval
Since Micah knows the change in velocity. Therefore, the only thing she needs to know the acceleration is time.
Learn more about acceleration here:
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An airplane is traveling at an altitude of 15,490 meters. A box of supplies is dropped from its cargo hold. What is the cargo's velocity when it hits the ground? (Show your work and do not forget units)
Answer :
556.59 m/s.
Explanation:
Given that,
An airplane is traveling at an altitude of 15,490 meters.
A box of supplies is dropped from its cargo hold. We need to find the velocity of cargo when it hits the ground.
The initial velocity of the box is 0 as it as at rest. Let v is the velocity of cargo when it hits the ground. We can find it using third equation of motion as follows :
[tex]v^2-u^2=2as[/tex]
Put u = 0 and a = g
[tex]v^2=2gs\\\\v=\sqrt{2gs} \\\\v=\sqrt{2\times 10\times 15490 } \\\\v=556.59\ m/s[/tex]
So, when it hits the ground its velocity is 556.59 m/s.
if a force of 50N is used to pull a box along the ground, at a distance of 8m. The box moves in the same direction as the force. Calculate the work done.
Answer:
400 JExplanation:
The work done by an object can be found by using the formula
workdone = force × distance
From the question we have
workdone = 50 × 8
We have the final answer as
400 JHope this helps you
The average kinetic energy of the particles in an object is
A. Temperature
B. Heat
C. Atoms
Answer:
A. temperature
Explanation:
The average kinetic energy of the particles in an object is temperature.
Please help!!! I'll give brainliest!!!
Which of the following are true about electric motors?
An armature spins to create kinetic energy.
A horseshoe magnet drives the spin of the armature.
The direction of the current is changing direction over and over.
All of these are correct.
The true statements about electric motion are:
An armature spins to create kinetic energy.A horseshoe magnet drives the spin of the armature.The direction of the current is changing direction over and over.What is electric motor?An electrical device that transforms electrical energy into mechanical energy is an electric motor. The majority of electric motors work by creating force in the form of torque imparted to the motor shaft through the interplay of the magnetic field of the motor and electric current in a wire winding.
Electric generators function with a reversed power flow, transforming mechanical energy into electrical energy, and are mechanically identical to electric motors.
Electric motors can be powered by alternating current (AC) sources like a power grid, inverters, or electrical generators or by direct current (DC) sources like batteries or rectifiers.
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what is the definition of force According to netwon's first law of motion
Answer:
Newton's first law states that every object will remain at rest or in uniform motion in a straight line unless compelled to change its state by the action of an external force. ... In other words, if object A exerts a force on object B, then object B also exerts an equal force on object A.
Hydrochloric acid and sodium hydroxide can be combined to form sodium chloride and water. (1 point)
Which best explains the reaction?
The mass of sodium hydroxide will result in the same mass of sodium chloride.
The total mass of hydrochloric acid and sodium hydroxide will result in a lower total mass of sodium chloride and water
The mass of hydrochloric acid will result in the same mass of sodium chloride.
The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water.
Answer:
The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water.
Explanation:
mass and volume are the same thing and has to be the last one.
The total mass of hydrochloric acid and sodium hydroxide will result in the same total mass of sodium chloride and water.
What is chemical reaction?Chemical reactions are the processes by which a substance or substances change chemically to create a new substance or substances with entirely new attributes. Products are completely distinct in nature and identity from reactants.
Chemical reactions never result in the loss or gain of mass. This is due to the fact that chemical reactions do neither produce or consume any atoms.
The reaction of Hydrochloric acid and sodium hydroxide carried out in a typical laboratory setting, matter is neither generated nor destroyed, nor are any elements changed into others. The total mass of the reactants ( NaOH and HCl) and the total mass of the products (NaCl and H₂O) are equal since matter is neither generated nor destroyed during a chemical reaction.
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What is the approximate force the Earth would exert on a 15 kilogram object?
plss i need asap!!!
Answer:
The approximate mass of the object is. 1. 0.01 kg.
Explanation:
between the magnitude of the gravitational force exerted on Earth by the ... A 60-kg physics student would weigh 1560 N on the surface of planet X.
