Answer:
2.26s
Explanation:
The time it takes for the egg to hit the ground can be calculated using the formula:
S = ut + 1/2at²
Where; S = distance of handball from ground (m)
t = time (s)
a = acceleration due to gravity (9.8m/s²)
u = initial velocity = 0m/s
Inserting our values into the formula, we have:
25 = (0 × t) + 1/2 (9.8 × t²)
25 = 0 + 9.8t²/2
25 = 9.8t²/2
25 × 2 = 9.8t²
50 = 9.8t²
t² = 50/9.8
t² = 5.102
t = √5.102
t = 2.258
t = 2.26s
In the desert air, sound travels at 358 meters per second (m/s). In the polar air, sound travels at 330 meters per
second (m/s). What can you conclude from this information?
A - The speed of sound is constant.
B - Sound waves travel fastest in a vacuum.
C-The temperature of the air affects the speed of sound.
D-Sound waves travel at the same speed everywhere on Earth.
Please provide your answer below using CER
1. Claim: What is your choice for the correct answer?
2. Evidence: What evidence did you observe from the test-like question that made you decide on your answer?
3. Reasoning: Provide an elaboration on your evidence, possible prior knowledge about your claim.
Answer:
The correct option is;
C. The temperature of the air affects the speed of sound
Explanation:
The information given are;
The speed with which sound travels in the desert air = 358 m/s
The speed with which sound travels in the polar air = 330 m/s
The major difference between the desert air and the polar air is that the temperature of the desert air is hotter than the temperature of the air in the polar region. Therefore the speed of sound is affected by the air temperature.
The equation that gives the relationship of the speed of sound in air, [tex]v_{air}[/tex], to temperature is presented as follows;
[tex]v_{air} = 331\frac{m}{s} \times \sqrt{\dfrac{T_K}{273 K} } = 331\frac{m}{s} \times \sqrt{1 + \dfrac{T_{^{\circ}C}}{273 ^{\circ} C} }[/tex]
Which shows that the speed of sound in air, [tex]v_{air}[/tex], rises as the temperature of the air rises.
Where;
[tex]T_{^{\circ}C}[/tex] = The temperature of the air in degrees Celsius
[tex]T_K[/tex] = The temperature of the air in degrees Kelvin.
What is the force of an object with a mass of 30 kg that is free falling?
Answer:
F = 294.3 [N]
Explanation:
To solve this problem we must use Newton's second law which tells us that force is equal to the product of mass by acceleration. It is this particular case the acceleration is due to the gravitational acceleration since the body is in free fall.
Therefore we have:
F = m*g
where:
F = force [N]
m = mass = 30 [kg]
g = gravity acceleration = 9.81 [m/s^2]
F = 30*9.81
F = 294.3 [N]
WH
Two forces are applied to a 3.0kg block on a
frictionless horizontal surface, as shown in the
diagram below
F1=25N
F2=ION
The apoeleration of the block 15
5.0 m/s2 to the left
2.0 m/s2 to the right
O 5.0 m/s2 to the left
6.0 m/s2 to the right
A coal train in Montana starts from rest and accelerates at 2.5m/s^2 for 15 s.
Complete Question
A coal train in Montana starts from rest and accelerates at 2.5m/s^2 for 15 Find the trains maximum velocity
Answer:
The maximum velocity is [tex]v = 37.5 \ m/s [/tex]
Explanation:
From the question we are told that
The acceleration is [tex]a =2.5\ m/s^2[/tex]
The time for the acceleration is [tex]t = 15 \ s[/tex]
Generally from the kinematics equation
[tex]v = u + at[/tex]
here u is the initial velocity and the value is 0 m/s given that it started rom rest
[tex]v = 0 + 2.5 * 15[/tex]
[tex]v = 37.5 \ m/s [/tex]
When examining evidence, why might investigators want to be more careful examining chemical properties than physical properties.
Answer:
Please find the answers in the explanation
Explanation:
In examination of any scientific observation, some experiments may be needed to be carried out.
When examining evidence, the investigators might want to be more careful examining chemical properties than physical properties because anything that involve chemical reaction are irreversible. While physical one can be reversible.
Also, reaction can easily take place when examining the chemical properties of some substances.
It is seldom for reaction to take place with physical one.
there can be some complications and danger with chemical properties but less complication and danger with physical one.
Therefore, the investigators will want to be more careful when examining evidence on chemical properties than physical properties due to the given reasons above.
F all of the energy in a falling object's gravitational potential energy store is transferred to its kinetic energy store by the time it lands, then the relationship shown below can be used. Which of the four options below it correctly shows how this relationship can be expressed in terms of height, h?
Answer:
The options are not shown, so let's derive the relationship.
For an object that is at a height H above the ground, and is not moving, the potential energy will be:
U = m*g*H
where m is the mass of the object, and g is the gravitational acceleration.
Now, the kinetic energy of an object can be written as:
K = (1/2)*m*v^2
where v is the velocity.
Now, when we drop the object, the potential energy begins to transform into kinetic energy, and by the conservation of the energy, by the moment that H is equal to zero (So the potential energy is zero) all the initial potential energy must now be converted into kinetic energy.
Uinitial = Kfinal.
m*g*H = (1/2)*m*v^2
v^2 = 2*g*H
v = √(2*g*H)
So we expressed the final velocity (the velocity at which the object impacts the ground) in terms of the height, H.
What is the critical angle of a light beam passed from a medium (n=2) to a medium (n=1.2)?
Answer:
θ_c = 36.87°
Explanation:
Index of refraction for index medium; n_i = 2
Index of refraction for Refractive medium; n_r = 1.2
Formula to find the critical angle is given;
n_i(sin θ_c) = n_r(sin 90)
Where θ_c is critical angle.
Thus;
2 × (sin θ_c) = 1.2 × 1
(sin θ_c) = 1.2/2
(sin θ_c) = 0.6
θ_c = sin^(-1) 0.6
θ_c = 36.87°
The data table shows how the amplitude of a mechanical wave varies with
the energy it carries. Analyze the data to identify the mathematical
relationship between amplitude and energy. Use your equation to find the
energy if the amplitude is 6 units.
Amplitude
Energy
1 unit
2 units
2 units
8 units
3 units
18 units
4 units
32 units
Answer:
162
Explanation:
When the amplitude of the wave is 8 units, the corresponding energy of the wave is 128 units. Therefore, option C is correct.
What do you mean by an amplitude ?The term amplitude is defined as the maximum distance moved by a point on a vibrating body or wave calculated from its equilibrium position.
We have given,
first amplitude, A = 1, corresponding energy = 2
second amplitude, A = 2, corresponding energy = 8
The energy of a string at a given amplitude is calculated as follows;
E ∝ A²
Energy varies as the square of the change in amplitude.
If amplitude of one has energy of two
Amplitude of 2 (double of 1)
= ( 2 x 2 ) = 4 x 2
= 8 4 times the energy at amplitude of 1.
Then for 8 units of amplitude change
8 x 8 = 64 x 2
= 128
Thus, When the amplitude of the wave is 8 units, the corresponding energy of the wave is 128 units, option C is correct.
To learn more about an amplitude, follow the link;
https://brainly.com/question/15930409
#SPJ2
Your question is incomplete, most probably your question was
The data table shows how the amplitude of a mechanical wave varies with the energy it carries. Analyze the data to identify the mathematical relationship between amplitude and energy. Use your equation to find the energy if the amplitude is 8 units.
Amplitude
1
2
3
4
energy
2
8
18
32
A.66 units
B. 108 units
C. 128 units
D. 88 units
A 2000 kg car moves along a horizontal road at speed vo
15.9 m/s. The road is
wet, so the static friction coefficient between
the tires and the road is only pls 0.105 and
the kinetic friction coefficient is even lower,
= 0.0735.
The acceleration of gravity is 9.8 m/s2.
What is the shortest possible stopping dis-
tance for the car under such conditions? Use
g= 9.8 m/s² and neglect the reaction time of
the driver.
Answer in units of m.
Answer:
The shortest possible stopping distance of the car is 175.319 meters.
Explanation:
In this case we see that driver use the brakes to stop the car by means of kinetic friction force. Deceleration of the car is directly proportional to kinetic friction coefficient and can be determined by Second Newton's Law:
[tex]\Sigma F_{x} = -\mu_{k}\cdot N = m \cdot a[/tex] (Eq. 1)
[tex]\Sigma F_{y} = N-m\cdot g = 0[/tex] (Eq. 2)
After quick handling, we get that deceleration experimented by the car is equal to:
[tex]a = -\mu_{k}\cdot g[/tex] (Eq. 3)
Where:
[tex]a[/tex] - Deceleration of the car, measured in meters per square second.
[tex]\mu_{k}[/tex] - Kinetic coefficient of friction, dimensionless.
[tex]g[/tex] - Gravitational acceleration, measured in meters per square second.
If we know that [tex]\mu_{k} = 0.0735[/tex] and [tex]g = 9.807\,\frac{m}{s^{2}}[/tex], then deceleration of the car is:
[tex]a = -(0.0735)\cdot (9.807\,\frac{m}{s^{2}} )[/tex]
[tex]a = -0.721\,\frac{m}{s^{2}}[/tex]
The stopping distance of the car ([tex]\Delta s[/tex]), measured in meters, is determined from the following kinematic expression:
[tex]\Delta s = \frac{v^{2}-v_{o}^{2}}{2\cdot a}[/tex] (Eq. 4)
Where:
[tex]v_{o}[/tex] - Initial speed of the car, measured in meters per second.
[tex]v[/tex] - Final speed of the car, measured in meters per second.
If we know that [tex]v_{o} = 15.9\,\frac{m}{s}[/tex], [tex]v = 0\,\frac{m}{s}[/tex] and [tex]a = -0.721\,\frac{m}{s^{2}}[/tex], stopping distance of the car is:
[tex]\Delta s = \frac{\left(0\,\frac{m}{s} \right)^{2}-\left(15.9\,\frac{m}{s} \right)^{2}}{2\cdot \left(-0.721\,\frac{m}{s^{2}} \right)}[/tex]
[tex]\Delta s = 175.319\,m[/tex]
The shortest possible stopping distance of the car is 175.319 meters.
I don't know what to do so first people to answer get 30 points
also tell me your favorite football team and hockey team
Answer:
seahawks, la kings
Explanation:
Which statement about two objects having the same momentum is true?
The product of mass X velocity is the same for both.
Mass and velocity are the same for both.
They both have the same mass.
They both have the same velocity.
Answer:
The product of mass X velocity is the same for both
Explanation:
The momentum of a body is the product of its mass and velocity.
Momentum = mass x velocity
Two objects having equal momentum will have the same for the product of their mass and velocity.
It is amount of motion a body can produce.what is the medium of the sound waves the student hears
Answer:
A
Explanation:
the air is the medium man
Answer:
the desk
Explanation:
Why might using the speed of light to determine the length of the meter be
more reliable than using a measured distance around Earth?
Answer:ghjkdfrtghjExplanation:
YOU ARE HUNGRY SO YOU WALK TO THE KITCHEN AND OPEN THE REFRIGERATOR DOOR. YOU NOTICE THAT THE LIGHT IS OFF AND THE FOOD IS COLD. YOU SEE THAT THE REFRIGERATOR IS PLUGGED IN THE WALL OUTLET. A MICROWAVE WHICH IS ON THE SAME ELECTRICAL OUTLET ALSO IS NOT WORKING.
MAKE A CLAIM, EVIDENCE, AND REASONING ABOUT ENERGY IN THE ABOVE SCENARIO
A toroidal solenoid has an inner radius of 12.0 cm and an outer radius of 15.0 cm . It carries a current of 1.50 A . Part A How many equally spaced turns must it have so that it will produce a magnetic field of 3.75 mT at points within the coils 14.0 cm from its center? Enter your answer numerically. mastering physics
Answer:
The number of turns is [tex]N = 1750 \ turns [/tex]
Explanation:
From the question we are told that
The inner radius is [tex]r_i = 12.0 \ cm = 0.12 \ m[/tex]
The outer radius is [tex]r_o = 15.0 \ cm = 0.15 \ m[/tex]
The current it carries is [tex]I = 1.50 \ A[/tex]
The magnetic field is [tex]B = 3.75 mT = 3.75 *10^{-3} \ T[/tex]
The distance from the center is [tex]d = 14.0 \ cm = 0.14 \ m[/tex]
Generally the number of turns is mathematically represented as
[tex]N = \frac{2 * \pi * d * B}{ \mu_o * r_o }[/tex]
Generally [tex]\mu_o[/tex] is the permeability of free space with value
[tex]\mu_o = 4\pi * 10^{-7} \ N/A^2[/tex]
So
[tex]N = \frac{2 * 3.142 * 0.14 * 3.75 *10^{-3} }{ 4\pi * 10^{-7} * 0.15 }[/tex]
[tex]N = 1750 \ turns [/tex]
Can you please help me it’s due at 11:59 please
Answer:
1 is summer, 2 is most likely winter,3 is most likely summer, and 4 is fall
Explanation:
What force is needed to move a barrel 45-m if 3600 J of work are accomplished?
Answer:
The answer is 80 NExplanation:
The force acting on the object can be found by using the formula
[tex]f = \frac{w}{d} \\ [/tex]
where
d is the distance
w is the work done
We have
[tex]f = \frac{3600}{45} \\ [/tex]
We have the final answer as
80 NHope this helps you
What is the velocity of a car that travels 200 meters In 8 seconds?
Answer:
25m/s
Explanation:
200m/ 8s =25m/s
How many marshmallows are in 80 bags if each bag hold 24 marshmallows?
Explanation:
80*24=1920 or 1,920
Just multiply
[tex]hopethishelpsyou[/tex]
Answer:
jeeze... this would be easier if the numbers were switched
Explanation:
i dont have an answer for ya but put 80x24=? in ur calculator
good luck m8
What creates the solar wind?
Answer:
The solar wind is created by the outward expansion of plasma (a collection of charged particles) from the Sun's corona (outermost atmosphere). This plasma is continually heated to the point that the Sun's gravity can't hold it down. It then travels along the Sun's magnetic field lines that extend radially outward.
How many minutes in 18 years? (Remember: 1 year = 365.25 days). Also, on these problems use a
bridge/table to organize your values
4.9671280 sec
4,9674280 min
9.467 280 sec
9 467280 min
answer:
in 18 years there are 9,467280 minutes
hope this helped! <3 i answered your question & hope you have a great day! if you wouldn't mind could you pls give me brainliest? (im trying to level up) thanks! :)
To understand the origin of the torque on a current loop due to the magnetic forces on the current-carrying wires.
This problem will show you how to calculate the torque on a magnetic dipole in a uniform magnetic field. We start with a rectangular current loop, the shape of which allows us to calculate the Lorentz forces explicitly. Then we generalize our result. Even if you already know the general formula to solve this problem, you might find it instructive to discover where it comes from.
a) Give a more general expression for the magnitude of the torque τ. Rewrite the answer found in Part A in terms of the magnitude of the magnetic dipole moment of the current loop m. Define the angle between the vector perpendicular to the plane of the coil and the magnetic field to be ϕ, noting that this angle is the complement of angle θ in Part A.
Give your answer in terms of the magnetic moment m, magnetic field B, and ϕ.
Answer:
The torque is [tex]\tau = B * m sin(\phi )[/tex]
Explanation:
Generally when current flow through a rectangular loop the magnetic dipole generated we can denote this as [tex]\vec m[/tex]
Here k is the length of the side of one side of the rectangular loop
Now when this loop is place in a magnetic field, the torque it experience is mathematically represented as
[tex]\vec \tau = \vec B \ X \ \vec m[/tex]
Here X stands for cross - product
From the question we are told that the angle between the vector ( [tex]\vec m[/tex])perpendicular to the plane of the coil and magnetic field(B) as [tex]\phi[/tex]
So
=> [tex]\tau = B * m sin(\phi )[/tex]
Covert 1 mile to feet. Then convert to inches. Then covert to centimeters. How many centimeters are in a mile?
Answer:
160,934.4 cm or in other words *160,934*
Explanation:
1 mile = 5280 ft.
5280 ft. = 63360 in.
63360 in. = 160934.4
PLEASE HELP!!!
If the current in a wire is 2.0 amperes and the potential difference across the wire is 10.0 volts, what is the resistance of the wire?
A person throws a baseball from height of 7 feet with an initial vertical velocity of 50 feet per second. Use the vertical motion model, h = -16t2 + v … t +s, where y is the initial velocity in feet per second and s is the height in feet, to calculate the amount of time the baseball is in the air before it hits the ground.
Answer:
t = 3.25 seconds.
Explanation:
A person throws a baseball from a height of 7 feet with an initial vertical velocity of 50 feet per second is given by :
[tex]h=-16t^2+vt+h_0[/tex]
[tex]h=-16t^2+50t+7[/tex]
We need to find the amount of time the baseball is in the air before it hits the ground. ATQ,
h = 0
[tex]-16t^2+50t+7=0\\\\t=\dfrac{-50 \pm \sqrt{50^2-4\times (-16)(7)} }{2(-16)}\\\\t=\dfrac{-50 + \sqrt{50^2-4\times (-16)(7)} }{2(-16)}, \dfrac{-50- \sqrt{50^2-4\times (-16)(7)} }{2(-16)}\\\\t=-0.134\ s,3.25\ s[/tex]
Neglecting negative value, t = 3.25 s
So, the baseball will hit the ground at t = 3.25 seconds.
At any given time in space, how much of
the moon is lit by the sun?
PLEASE ANSWER QUICKLY!!!
Answer: 50%
Explanation: The sun and the moon go around Earth and The sun is way bigger than the moon so 50% of the sun lights up the moon at night
Answer:
50%
Explanation:
Explain and reason why the the moon rotates around the earth every lunar cycle
Pls explain ASAP
Best answer will be marked as BRAINLIEST✨
1. who was john locke?
2. what were his 3 big ideas?
3. what does each of his 3 big ideas mean?
a) What is an atom?
b) What are the three sub-atomic particles of an atom
c) Where is the proton located?
d) Where is the neutron located?
e) Where is the electron located.
What is the charge of the electron? *
Answer:
A) basic units of matter
B) Protons, neutrons, electrons
C) In the nucleus
D) In the nucleus
E) Outside of the nucleus
Explanation:
Answer:
A-Atoms are the basic units of matter and the defining structure of elements.
B-Atoms are composed mainly of protons, neutrons, and electrons.
C and D-Protons and neutrons are found in the nucleus.
E-outside nucleus=eletron location,
Electrical charge is a fundamental aspect of matter. It has two different types called positive and negative (these are just conventional names, there’s nothing special about being positively charged vs. negatively charged). It has the peculiar property where like charges (two positive or two negative) will repel each other while two opposed charges (one each of positive and negative) will attract each other.
Hope this helps!
A 3 kg rock is subject to the force of gravity for 8 s. What is the impulse?
Answer:
The impulse on the block due to force of gravity is 235.2 N.s
Explanation:
Given;
mass of the block, m = 3 kg
time of force of gravity action on the block, t = 8 s
Force of gravity on the block is given as;
F = mg
where;
m is mass of the block
g is acceleration due to gravity = 9.8 m/s²
F is the force of gravity
Substitute the given values and calculate F
F = mg
F = 3 x 9.8
F = 29.4 N
The Impulse on the block is given by;
J = Ft
J = 29.4 N x 8 s
J = 235.2 N.s
Therefore, the impulse on the block due to force of gravity is 235.2 N.s
