ANSWER
[tex]8.72s[/tex]EXPLANATION
To find the time of flight, apply the formula for a projectile's time of flight:
[tex]T=\frac{2u\sin \theta}{g}[/tex]where u = initial velocity
θ = angle of launch
g = acceleration due to gravity
Therefore, the time of flight of the cannonball is:
[tex]\begin{gathered} T=\frac{2\cdot85.5\cdot\sin 30}{9.8} \\ T=8.72s \end{gathered}[/tex]What would be the reaction force for the following action force: Hand hits a table.
Hand feels pain.
Hand stops moving.
Table hits hand.
Table makes a noise.
Answer:
hand feels pain
Explanation:
I think the right answer is hand feels pain.
According to Newton's third law of motion, for every action, there is an equal and opposite reaction. In the scenario you described, the action force is the hand hitting the table.
Hand feels pain: When the hand hits the table, the hand exerts a force on the table. Simultaneously, the table exerts an equal and opposite reaction force on the hand. This reaction force is responsible for the sensation of pain that the hand feels upon impact. It is essentially the force transmitted back from the table to the hand.
Hand stops moving: The reaction force from the table, acting in the opposite direction to the action force, causes the hand to stop moving. As the hand applies a force to the table, the table applies an equal and opposite force to the hand, resulting in a deceleration of the hand's motion until it comes to a stop.
Table hits hand: As mentioned earlier, the table exerts a reaction force on the hand. This reaction force acts in the opposite direction to the action force, causing the table to exert a force on the hand. Therefore, the table hitting the hand is a consequence of the reaction force resulting from the hand hitting the table.
Table makes a noise: The noise produced when the hand hits the table is not directly related to the reaction force itself. The noise is typically the result of the vibrations and movements caused by the impact between the hand and the table. These vibrations propagate through the table, air, and other surrounding objects, creating sound waves that we perceive as noise.
It's important to note that while Newton's third law states that the magnitudes of the action and reaction forces are equal, the effects they produce can be different due to variations in mass, acceleration, and other factors involved.
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How long (in years) can a battery that can supply 8.30e4 J run a pocket calculator that consumes energy at the rate of 1.10e-3 W?
Answer:
1 J = 1 W-sec
8.30E4 J / 1.10E-3 J/s = 7.58E7 sec
1 year = 365 d * 24 h/d * 3600 sec/hr = 3.15E7 sec
T = 7.58E7 sec / 3.15E7 sec / yr = 2.40 yrs
Can you please help me with my first lap question
Explanation:
A charge is a scalar quantity associated with every material. when we say a body or an object is charged then it means that a body or an object gained a positive charge or negative charge.
A conductor is a metal that contains a lot of electrons in it.
A dark knob or a ground is the source or sink where any charge is dumped.
(1)
when there is a negative charge on an object that will be spread over the surface by the Coulomb force.
so (c) spread out over a large area on the object.
(2)
both the positive and negative charges move to the conductor and exit the conductor.
(3)
(b) a person can not be shocked if they have a neutral charge.
All options have been defined.
Carl drops a 2.42 kg rock into a pit. The pit is 13 m deep. How long does it take for the rock to fall to the bottom of the pit?
Answer:
1.63 s
Explanation:
Mass of the rock is irrelavent...not needed.
d = 1/2 a t^2
13 = 1/2 ( 9.81) t^2 t = 1.63 seconds
When a planet orbits the Sun in (nearly) a
circle...
A. gravity pushes it away from the Sun.
B. a centripetal force pulls it toward the Sun.
C. a centrifugal force pushes it away from the Sun.
D. inertia pulls it in toward the Sun.
When a planet orbits the Sun in a circle a centripetal force pulls it toward the Sun.
What is centripetal force?As an object travels in a circular path, it encounters a force known as centripetal force. .This force is directed towards the center of the circle and is essential to maintain the circular motion of the object. Without it, the object would move off in a straight line and not continue in its circular path.
What happens when a planet orbits the Sun in a circle?When an object moves in a circular path, it experiences a force known as centripetal force. This force pulls the object towards the center of the circle. For instance, when a planet orbits around the Sun, gravity acts as the centripetal force that keeps it moving along its circular path. The gravitational pull between the Sun and the planet continuously directs it towards the center of its orbit and prevents it from wandering off into space or escaping from the Sun's gravitational field.
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Can someone please help me
With the application of resolution of vector, the net force is 197 N and the direction is 59 degree.
Resolution of ForcesResolution of forces can simply be solved by resolving to horizontal and vertical component.
In the given figure, we will resolve the forces into horizontal and vertical components.
Horizontal component
Fh = 80 cos 80 + 60 cos 30 + 70 cos 60
Fh = 13.89 + 51.96 + 35
Fh = 100.85 N
Vertical Component
Fv = 80 sin 80 + 60 sin 30 - 70 sin 60
Fv = 78.78 + 30 + 60.62
Fv = 169.4 N
Resultant force = √( Fh² + Fv²)
Resultant force = √(100.85² + 169.4²)
Resultant force = √(10170.7 + 28696.4)
Resultant force = √38867.06
Resultant force = 197.15 N
The direction will be
Tan Ф = Fv/Fh
Tan Ф = 169.4 / 100.85
Tan Ф = 1.68
Ф = [tex]tan^{-1}[/tex](1.68)
Ф = 59.23
Therefore, the magnitude of resultant force is 197.15 N and the direction is 59 degree north east
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Each of the following equations was given by a student during an examination. Do a dimensional analysis of each equation and explain why the equation can't be correct.(a) 1/2 mv2 = 1/2mv02 + √mgh
The dimensional analysis of the given equation is solved as
[tex]\begin{gathered} \frac{1}{2}mv^2=\frac{1}{2}mv^2_0+\sqrt[]{mgh} \\ \lbrack M^1L^2T^{-2}\rbrack=\lbrack ML^2T^{-2}\rbrack+\lbrack M^1L^2T^{-2}\rbrack^{\frac{1}{2}} \\ \lbrack M^1L^2T^{-2}\rbrack=\lbrack M^{\frac{3}{2}}L^3T^{-3}\rbrack \end{gathered}[/tex]As the left-hand side of the dimension is not equal to the right-hand side of the dimension.
Hence, it is dimensionally incorrect.
A 2 kg object and a 1 kg object are dropped from the same height.
Given that the inertia
masses of these objects are not the same, what hypothesis explains
why the two objects
fall with the same acceleration?
Select one:
O a. The force of gravity is the same for the 1 kg object as for the 2 kg object
O b. The force of friction is the same for the 1 kg object as for the 2 kg object.
O c. The force of gravity on the 1 kg object is twice as great as on the 2 kg object.
Od. The force of friction on the 2 kg object is twice as great as on the 1 kg object.
The first choice (A) will be accurate.
Objects weighing 1 kg and 2 kg are dropped from the same height.
Because the force of gravity is the same for both the 1 kg and the 2 kg objects, the two objects fall with the same acceleration.
What is gravity?Gravity pulls you toward the ground because all objects with mass, such as our Earth, actually bend and curve the fabric of the universe, known as spacetime. Gravity is the curvature of the earth. Gravity, also known as gravitation, is a force that exists between all physical objects in the universe. The force of gravity tends to attract any two objects or particles with nonzero mass toward each other. Gravity affects objects of all sizes, from subatomic particles to galaxy clusters. Gravity is the force that pulls objects toward the center of a planet or other entity. Gravity keeps all of the planets in orbit around the sun.To learn more about gravity, refer
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two large boxes sit side by side on a sidewalk. the box on the left has a mass of 80kg and the box on the right has a mass of 50kg. a force is applied to the box on the left , such that both boxes accelerate to the right. draw a free body diagram for each box. include the force of friction
The force that prevents motion when the surfaces of two objects come into contact is known as friction. Friction decreases a machine's mechanical advantage, or, to put it another way, reduces the output to input ratio.
How can I figure out the frictional force?The resistive force of friction (Fr) divided by the normal or perpendicular force (N) pushing the objects together yields the coefficient of friction (fr), which is a numerical value.
The formula fr = Fr/N serves as a representation of it.
Therefore, 100N of force is needed to move an item with a mass of 50 kg.
It will accelerate by 10 m/s2.
If a substance's mass does not change over time, friction cannot affect it. Instead, friction can be affected in a variety of ways by an object's mass.
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Please help! This is due tomorrow!
A cyclist maintains a constant velocity of 6.4 m/s headed away from point A. At some initial time, the cyclist is 249 m from point A.
Part A: What will be his displacement from his starting position after 79 s?
Part B: What will be his position from point A after that time?
From the law of universal gravitation, the following gravitational forces have been calculated.
Earth and Large Ball 0.882 N
Earth and Small Ball 0.049 N
Large Ball and Feather 2.41 10-14 N
Large Ball and Small Ball ?
____________
Use the formula for the law of universal gravitation to calculate the gravitational force between the large ball and the small ball. Assume the distance between them is 0.5 m.
The mass of the objects
Small Ball = 5.0 10-3 kg
Large Ball = 9.0 10-2 kg
Feather = 1.0 10-3 kg
The gravitational force between the large ball and the small ball is 1.2×10⁻¹³ N
How to determine the gravitational forceThe gravitational force between the large ball and the small ball can be obtained as illustrated below:
Mass of larger ball (M₁) = 9.0×10⁻² KgMass of small ball (M₂) = 5.0×10⁻³ KgDistance apart (r) = 0.5 mGravitational constant (G) = 6.67×10¯¹¹ Nm²/Kg²Gravitational force (F) =?F = GM₁M₂ / r²
F = (6.67×10¯¹¹ × 9.0×10⁻² × 5.0×10⁻³) / (0.5)²
F = 1.2×10⁻¹³ N
Thus, from the above calculation, we can conclude that the gravitational force is 1.2×10⁻¹³ N
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A 1780-pound car is parked on a street that makes an angle of 15° with the horizontal. Find the magnitude of the force required to keep the car from rolling down the hill.
We will determine the force required as follows:
[tex]\begin{gathered} F=(890kg\ast9.8m/s^2)sin(15)\Rightarrow F=2257.419711...N \\ \\ \Rightarrow F\approx2257.4N \end{gathered}[/tex]So, the force required is approximately 2257.4 N.
therwise express your answer in terms of g.
1. A 10 kg box with an initial velocity of 2 m/s slows to rest over a distance of 10 meters on
a level surface. What is the size of the frictional force on the box? What is the size of the
normal force on the box? What is the ratio of the frictional force to the normal force?
The size of the frictional force on the box is 2N
The size of the normal force on the box is 98.1 N
The ratio of the frictional force to the normal force is 0.02
What is the size of the frictional force acting on the body?The size of the frictional force on the box is calculated as follows:
Total force acting on the box = Net force + Normal force
Hence;
Normal force = Total force - Net force
Net force on the box = mass * acceleration
From the formula, v² = u² + 2as
where a = acceleration
v = final velocity
u = initial velocity
s = distance
a = v² - u² / 2s
v = 0 m/s
u = 2 m/s
s = 10 m
a = 0 - 2² / 2 * 10
a = - 0.2 m/s²
Net force = 10 * -0.2 m/s²
Net force = 2 N
The frictional force = Stopping Force = Net force
Hence, frictional force = 2 N.
Normal force = mass * g
Normal force = 10 * 9.81
Normal force = 98.1 N
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platypus is considered as a bridge anim why al between birds animal between bird and mammals why
Answer:
monotremes such as the platypus often display early mammalian features that are similar to reptilian physiology and thus reflect all mammals' common evolutionary origin in reptiles. These features include the platypus's lower body temperature and lack of teats.
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Two billiard balls of equal mass move at right angles and meet at the origin of an xy coordinate system. Ball A is moving upward along the y axis at vA = 1.6 m/s , and ball B is moving to the right along the x axis with speed vB = 5.1 m/s . After the collision, assumed elastic, ball B is moving along the positive y axis
a)What is the final direction of ball A?
b) What are their two speeds?
a ) The final direction of ball A is along x-axis in positive direction.
b ) The speed of ball A is 5.1 m / s and that of ball B is 1.6 m / s
In an elastic collision between two objects of same mass, the balls would move at right angles with each other. So, it is given that, the final direction of ball B is along positive Y-axis. So the final direction of ball A must be perpendicular to that direction which is positive x-axis.
The initial velocity of ball A = 1.6 m / s
The initial velocity of ball B = 5.1 m / s
In an elastic collision between two objects of same mass, the balls would exchange velocities.
Final velocity of ball A = 5.1 m / s
Final velocity of ball B = 1.6 m / s
Therefore,
a ) The final direction of ball A is along x-axis in positive direction.
b ) The speed of ball A is 5.1 m / s and that of ball B is 1.6 m / s
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Danny takes his dog to the local dog park every morning, as well (dog-walking is verypopular in this area).He walks with his dog 5 blocks east, 5 blocks north, and 5 west in order to get to the park.If each block is 56 meters, what distance did Danny travel in meters?Answer:m
Given:
Danny takes his dogs to the park.
He walks with his dog 5 blocks east, 5 blocks north, and 5 west to get to the park.
Each block is 56 m.
To find:
The total distance covered by Danny
Explanation:
The total number of blocks Danny covers is,
[tex]5+5+5=15[/tex]As the distance does not require the direction, the distance covered by Danny is,
[tex]\begin{gathered} D=15\times56 \\ =840\text{ m} \end{gathered}[/tex]Hence, the distance covered by Danny is 840 m.
Which object has less mass but greater volume that a soccer ball ?A) smart phone B) a box of tissue C)a filled ballD) an empty balloon
D) An empty ballon have a greater volume and less mass than a soccer ball.
A car traveling at a speed of 35.0 m/s encounters an emergency and comes to a complete stop.
How much time will it take for the car to stop if it decelerates at -4.0 m/s²?
Answer:
time will it take for the car to stop = 8.75 s
Explanation:
The formula linking final velocity(v), initial velocity(u), acceleration(a) and time(t) is
v = u + at
The final velocity is 0 m/s since the car comes to a stop
Initial velocity u = 35 m/s
a = -4 m/s²
We have to find t
Plug in values
0 = 35 + (-4)t
-4t + 35 = 0
-4t = -35
t = -35/-4 = 8.75 s
if a hammer for (mass= 0.45kg) is 1.7m high on a shelf , how much potential energy does it have ?
Given,
The mass of the hammer, m=0.45 kg
The height of the shelf, h=1.7 m
The potential energy is given by,
[tex]E_P=mgh[/tex]Where g is the acceleration due to gravity.
On substituting the known values in the above equation,
[tex]E_P=0.45\times9.8\times1.7=7.5\text{ J}[/tex]Therefore the potential energy of the hammer is 7.5 J
How do you do circuit 7 of Q2, the current in each arm of the circuit?
ANSWER:
55Ω
I = 0.22 amp
STEP-BY-STEP EXPLANATION:
We are divided into two parts, the first is to solve the parallel system, like this:
[tex]\begin{gathered} \frac{1}{R_T}=\frac{1}{R_1}+\frac{1}{R_2} \\ \text{ replacing:} \\ \frac{1}{R_T}=\frac{1}{10}+\frac{1}{10} \\ R_T=\frac{100}{10+10}=\frac{100}{20}=5\Omega \end{gathered}[/tex]Then we have a series system, therefore, we solve like this:
[tex]R_T=5+50=55\Omega[/tex]The first thing is to calculate the current, knowing that the voltage is equal to 12V, like this:
[tex]\begin{gathered} I=\frac{V}{R}=\frac{12}{55} \\ I=0.22\text{ amp} \end{gathered}[/tex]There are 118 recognized pure substances that cannot be broken down into more simpler substances these are 118 substances are called
The substances that can't be broken into simpler substances are called "elements", and their properties are found in the periodic table of elements. Therefore, H is the right answer.
HELP! You walk 5 miles north, then turn around and walk 4 miles south. Calculate distance and displacement.
The distance and displacement are equal to 9 miles and 1 miles respectively.
What is distance?Distance can be defined as the amount of ground that is covered (travelled) by a physical object over a particular period of time and speed, irrespective of its direction, starting point or ending point.
In this scenario, the total distance covered (walked) by this person can be calculated by adding the distance he walked in the north direction to the distance he walked in the south direction as follows:
Distance = xf + x₀
Distance = 5 + 4
Distance = 9 miles.
On the other hand (conversely), the displacement would be calculated by subtracting the distance he walked in the south direction from the distance he walked in the north direction as follows:
Displacement = xf - x₀
Displacement = 5 - 4
Displacement = 1 mile.
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Draw a supply graph for pizzas. Show what would happen to the supply of pizzas if two more pizzerias open up in town. Identify the determinant of supply that caused the shift.
Pizza delivery when two other pizzerias in town started changing their prices on their products.
All other things being equal an increase in demand will increase the equilibrium price. More will be delivered. A decrease in demand leads to a decrease in the equilibrium price. Low shipping quantity. An increasing change in supply shifts the supply curve to the right, and a decreasing change in supply shifts the supply curve to the left.
Essentially an increase or decrease in quantity offered at a higher or lower offer price. As the price of pizza slices rises consumers are more likely to purchase these alternatives as pizza replacements. This reduces the amount of pizza requested. Higher prices tend to increase supply as more prizes become available.
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Imagine you are a teacher. You are describing the atomic properties of inert gases to your second-grade class. You have supported your verbal lecture with a paper published in a scientific journal. If your students do not pay attention to the material, it is probably because:
Responses
The material is probably because your message was not at the right level of complexity.
Inert gases are gases that do not undergo chemical reactions under certain conditions. Noble gases often do not react with many substances and have historically been called inert gases. Inert gases are gases that have extremely low reactivity with other substances. The noble gases helium argon neon xenon krypton radon and the elements exist in elemental form and are included in group 18 of the periodic table.
Very sluggish and stable due to its complete shell. This means that it does not tend to react with other elements to form compounds. Under normal conditions they are gases. It is colorless and odorless. In many respects, inert gases are typically non-metallic. They are colorless, odorless gases with low melting and boiling points. Even liquids are poor conductors of heat and electricity.
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An m = 6 kg ball is projected with initial horizontal speed v = 60 m/s from a platform h = 80 meters high.(a) How much time does it take for the ball to reach the ground?(b) What is the ball's kinetic energy when it reaches the ground?
Given the mass of the ball, m= 6 kg, and the horizontal speed, v = 60 m/s.
Also, the height of the platform, h = 80 m
(a) To find the time required to reach the ground, t
Time can be calculated from the formula
[tex]\begin{gathered} h=\frac{1}{2}gt^2 \\ t=\sqrt[]{\frac{2h}{g}} \end{gathered}[/tex]Here, g= 9.8 m/s^2 which is the acceleration due to gravity.
Substituting the values in the above equation, we get
[tex]\begin{gathered} t=\sqrt[]{\frac{2\times80}{9.8}} \\ =4.03\text{ seconds} \end{gathered}[/tex](b) To find the Kinetic energy of the ball.
In order to find kinetic energy, first, we need to find the velocity.
The velocity at the ground, u can be obtained by the formula
[tex]u=v+gt[/tex]Substituting the values, we get
[tex]\begin{gathered} u=60+(9.8\times4.03)_{} \\ u=99.49\text{ m/s} \end{gathered}[/tex]Substituting the value of velocity in the below formula of kinetic energy, we get
[tex]\begin{gathered} KE=\frac{1}{2}mu^2 \\ =\frac{1}{2}\times6\times(99.49)^2 \\ =29694.78\text{ J} \end{gathered}[/tex]Thus, the time taken is 4.03 seconds and kinetic energy is 29694.78 J
QT= 160 micro-Coulombs In scientific notation, what is that charge in just Coulombs?
We are given the following quantity:
[tex]Q=160\text{ micro-Coulomb}[/tex]Let's remember that in scientific notation the term "Micro" refers to ten to the minus 6, therefore, this is equivalent to:
[tex]Q=160\times10^{-6}C[/tex]We can convert this into standard notation by multiplying by the ten to the minus six:
[tex]Q=0.00016C[/tex]Therefore, the charge is 0.00016 Coulomb.
A car travelling at 30 /s accelerates at 5 m/s^2 for 7 seconds. What is the final velocity of the car?
Answer:
final velocity of the car = 65 m/s
Explanation:
Final velocity is given by
v = u + at where u is initial velocity, a = acceleration and t time taken
with u = 30 m/s, a = 5 m/s² and t = 7 s
Final velocity
v = 30 + 5 x 7
v = 30 + 35
v = 65 m/s
All of the following are characteristics of gravity except
Answer 1-It is a force of attraction
Answer 2-It does not change
Answer 3-It is described as the bending of space
Answer 4 - it is responsible for the planets revolving around the sun
Gravity is not described as the bending of space.
So answer 3 is the correct option among them.
What is gravity?Gravity is described as a fundamental interaction which causes mutual attraction between all things with mass or energy.
The characteristics of gravity include the following:
It is a force of attractionIt does not change it is responsible for the planets revolving around the sunGravity is also known as the universal force of attraction acting between all matter. Gravity has been found by experts to be by far the weakest known force in nature.
In conclusion, Gravity creates stars and planets by pulling together the material from which they are made.
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7. Which of the following is the function of the step-up transformer?A. Decreases the currentB. Decreases the transmission voltageC. Increases the currentD. Increases the transmission voltage
The function of a step-up transformer is to convert low voltage to High voltage.
D. Increases the transmission voltage
What is the direction of the resultant. ASAPP
Answer:The direction of the resultant can be determined by finding the angle that the resultant makes with either the north-south or the east-west vector. The diagram at the right shows the angle theta (Θ) marked inside the vector addition triangle. This angle theta is the angle that the resultant makes with west.
Explanation: Because i said
