Two rocks are thrown simultaneously from the top of a very tall tower with identical speeds of v = 5.90 m/s, but in two different directions. (See figure.)
One of them is thrown with an angle of 17.4 degrees below the horizontal, and the other one is thrown at an angle of 57.6 degrees above the horizontal. How far will the rocks be from each other after 5.45 s? (Neglect air resistance and assume that the rocks will not hit the ground.)
Answers
Answer:
≈39.2354 [m]
Explanation:
1) coordinates of the rock 1;
2) coordinates of the rock 2; note, ↑ means, the rock moves up, ↓ means the rock moves down;
3) the required distance.
For more info see the attachment.
Related Questions
How have humans
changed the area and how might this affect recovery after the flood?
Answers
Answer:
Explanation:
Loss of lives and property: Immediate impacts of flooding include loss of human life, damage to property, destruction of crops, loss of livestock, non-functioning of infrastructure facilities and deterioration of health condition owing to waterborne diseases. Flash floods, with little or no warning time, cause more deaths than slow-rising riverine floods.
Loss of livelihoods: As communication links and infrastructure such as power plants, roads and bridges are damaged and disrupted, economic activities come to a standstill, resulting in dislocation and the dysfunction of normal life for a period much beyond the duration of the flooding. Similarly, the direct effect on production assets, be it in agriculture or industry, can inhibit regularly activity and lead to loss of livelihoods. The spill over effects of the loss of livelihoods can be felt in business and commercial activities even in adjacent non-flooded areas.
Decreased purchasing and production power: Damage to infrastructure also causes long-term impacts, such as disruptions to clean water and electricity, transport, communication, education and health care. Loss of livelihoods, reduction in purchasing power and loss of land value in the flood plains lead to increased vulnerabilities of ties living in the area. The additional cost of rehabilitation, relocation of people and removal of property from flood-affected areas can divert the capital required for maintaining production.
Mass migration: Frequent flooding, resulting in loss of livelihoods, production and other prolonged economic impacts and types of suffering can trigger mass migration or population displacement. Migration to developed urban areas contributes to the overcrowding in the cities. These migrants swell the ranks of the urban poor and end up living in marginal lands in cities that are prone to floods or other risks. Selective out-migration of the workforce sometimes creates complex social problems.
Psychosocial effects: The huge psycho-social effects on flood victims and their families can traumatize them for long periods of time. The loss of loved ones can generate deep impacts, especially on children. Displacement from one’s home, loss of property and livelihoods and disruption to business and social affairs can cause continuing stress. The stress of overcoming these losses can be overwhelming and produce lasting psychological impacts.
Hindering economic growth and development: The high cost of relief and recovery may adversely impact investment in infrastructure and other development activities in the area and in certain cases may cripple the frail economy of the region. Recurrent flooding in a region may discourage long-term investments by the government and private sector alike. Lack of livelihoods, combined with migration of skilled labour and inflation may have a negative impact on a region’s economic growth. Loss of resources can lead to high costs of goods and services, delaying its development programmes.
Political implications: Ineffective response to relief operations during major flood events may lead to public discontent or loss of trust in the authorities or the state and national governments. Lack of development in flood-prone areas may cause social inequity and even social unrest posing threat to peace and stability in the region.
A ball from to a planet that has a gravitational acceleration that double that of Earth How does the gravitational force on the new planel c gravitational force on the ball when on Earth?
Answers
Answer:
Explanation:
The gravitational force on the ball when it is on the new planet is double the force on the ball when it is on Earth. The gravitational force on the ball when it is on the new planet is half the force on the ball when it is on Earth.
Which tells us speed and direction?
1).speed
2).displacement
3).distance
4).velocity
Answers
Answer:
velocity
Explanation:
Answer:
Velocity
Velocity tells you the speed and the direction it's going. Speed only tells you the speed, with no direction.
Explanation:
Pls help! What is the average speed of an airplane that travels from New York to Los Angeles, a total distance of 4800 km, in 6.0 hours?
A.
800 km/hr
B.
80 km/hr
C.
0.00125 km/hr
D.
28,800 km/hr
Answers
Answer:
800 meters per hour
Explanation:
800 meters per hour is the average speed of an airplane that travels from New York to Los Angeles, a total distance of 4800 km, in 6.0 hours.
A 75.0 kg ladder that is 3.00 m long is placed against a wall at an angle theta. The center of gravity of the ladder is at a point 1.20 m from the base of the ladder. The coefficient of static friction at the base of the ladder is 0.800. There is no friction between the wall and the ladder. What is the vertical force of the ground on the ladder?
Answers
The vertical force is given as 735.75 N
How to solve for the vertical forceGiven that there is no friction existing between the wall and the ladder, we would have
w - n = 0
w is the weight of thios ladder
while N is the vertical force that acts on it
n = w
the formula for n = mg
this is mass of ladder * the gravitational constant
= 75.0 kg ladder * 9.81
= 735.75 N
written as substituting the weight of the ladder, W = 75.0 kg * 9.81 m/s^2 = 735.75 N
Therefore the vertical force is givem as 735.75 N
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Prove that you can do a one foot spin.
Answers
What is net force 200N air and 600N gravity
Answers
600N - 200N = 400N
Let me know if it works.
When different organism try to obtain the same resources at the same time what occurs?
Answers
Answer:
Explanation:
When two or more individuals or populations try to use the same limited resources such as food, water, shelter, space, or sunlight, it is called competition. Competition can occur among individuals of the same species such as white tail deer competing for the same food or the same mate.
Answer:
i believe it is called competition.
Explanation:
who was the first person to describe the earth as a magnet
Answers
Answer:
William Gilbert
Explanation:
first described the Earth as a giant dipole magnet 400 years ago. But, as Rod Wilson recounts, he did far more than this.
Answer:
william gilbert
Explanation:
first described the Earth as a giant dipole magnet 400 years ago. But, as Rod Wilson recounts, he did far more than this.
What is sound waves
Answers
Sound waves are a type of mechanical wave that propagate through a medium, typically air but also other materials such as water or solids.
Characteristics of sound wavesFrequency: the frequency of a sound wave refers to the number of cycles or vibrations it completes per second and is measured in Hertz (Hz).
Amplitude: the amplitude of a sound wave refers to the maximum displacement or intensity of the wave from its equilibrium position. It represents the loudness or volume of the sound, with larger amplitudes corresponding to louder sounds and smaller amplitudes corresponding to softer sounds.
Wavelength: the wavelength of a sound wave is the distance between two consecutive points in the wave that are in phase, such as from one peak to the next or one trough to the next. It is inversely related to the frequency of the wave.
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100 g of Ice at -10°C is added into a
liquid juice at 20°c . The temperature of Juice
dropped to l0°c after all the Ice has melted.
Calculate the mass of the Juice responsible
for metting an Ice
Answers
Answer:
The mass of the juice responsible for melting the ice is 949.043 grams.
Explanation:
By the First Law of Thermodynamics, we understand that juice releases heat to the ice, which turns into water under the assumption that interactions between the ice-juice system and surroundings are negligible and energy processes are done in steady-state. Since juice is done with water, its specific heat will be taken as of the water. The process is described by the following formula:
\(m_{i} \cdot [c_{i}\cdot (T_{1}-T_{2}) - L_{f} + c_{w}\cdot (T_{2}-T_{3})] + m_{w} \cdot c_{w}\cdot (T_{4}-T_{3}) = 0\) (1)
Where:
\(m_{i}\) - Mass of ice, in grams.
\(m_{w}\) - Mass of the juice, in grams.
\(c_{i}\) - Specific heat of ice, in joules per gram-degree Celsius.
\(c_{w}\) - Specific heat of water, in joules per gram-degree Celsius.
\(L_{f}\) - Latent heat of fusion, in joules per gram.
\(T_{1}\) - Initial temperature of ice, in degrees Celsius.
\(T_{2}\) - Melting point of water, in degrees Celsius.
\(T_{3}\) - Final temperature of the ice-juice system, in degrees Celsius.
\(T_{4}\) - Initial temperature of the juice, in degrees Celsius.
If we know that \(m_{i} = 100\,g\), \(c_{i} = 2.090\,\frac{J}{g\cdot ^{\circ}C}\), \(c_{w} = 4.18\,\frac{J}{g\cdot ^{\circ}C}\), \(L_{f} = 334\,\frac{J}{g}\), \(T_{1} = -10\,^{\circ}C\), \(T_{2} = 0\,^{\circ}C\), \(T_{3} = 10\,^{\circ}C\) and \(T_{4} = 20\,^{\circ}C\), then the mass of the juice is:
\(m_{w} = \frac{m_{i}\cdot [c_{i}\cdot (T_{1}-T_{2}) - L_{f} + c_{w}\cdot (T_{2}-T_{3})]}{c_{w} \cdot (T_{3}-T_{4})}\)
\(m_{w} = \frac{(100\,g)\cdot \left[\left(2.090\,\frac{J}{g\cdot ^{\circ}C} \right)\cdot (-10\,^{\circ}C) - 334\,\frac{J}{g} +\left(4.18\,\frac{J}{g\cdot ^{\circ}C} \right)\cdot (-10\,^{\circ}C) \right]}{\left(4.180\,\frac{J}{g\cdot ^{\circ}C} \right)\cdot (-10\,^{\circ}C)}\)
\(m_{w} = 949.043\,g\)
The mass of the juice responsible for melting the ice is 949.043 grams.
Modified Newtonian dynamics(MoND)proposes that, for small accelerations, Newton’s second law, F = ma, approaches the form F = ma2/a0, where a0 is a constant.
(a) (10 points) Show how such a modified version of Newton’s second law can lead to flat rotation curves, without the need for dark matter.
(b) (10 points) Alternatively, propose a new law of gravitation to replace F = GMm/r2 at distances greater than some characteristic scale r0 so that again, you can explain the observed flat rotation curved of galaxies without dark matter.
Answers
Answer:
Explanation:
The two pictures attached here shows the solution to the two questions from the problem. thank you and I hope it helps you
What is the average velocity of a train moving along a straight track if its displacement is 192 m was during a time period of 8.0 s
Answers
Answer:
The average velocity of a train moving along a straight track if its displacement is 192 m was during a time period of 8.0 s is 24 \(\frac{m}{s}\).
Explanation:
Velocity is a physical quantity that expresses the relationship between the space traveled by an object and the time used for it. Then, the average velocity relates the change in position to the time taken to effect that change.
\(velocity=\frac{displacement}{time}\)
Velocity considers the direction in which an object moves, so it is considered a vector magnitude.
In this case, the displacement is 192 m and the time period is 8 s. Replacing:
\(velocity=\frac{192 m}{8 s}\)
Solving:
velocity= 24 \(\frac{m}{s}\)
The average velocity of a train moving along a straight track if its displacement is 192 m was during a time period of 8.0 s is 24 \(\frac{m}{s}\).
A rock, a book and a can of soda all have the same mass. Which of the following best describes their relationship?
A. They are all the same size
B. They each contain the same amount of matter.
C. They are each made of the same element.
D. They each occupy the same amount of space.
Answers
Answer:
Explanation:
d
A rock, a book and a can of soda all have the same mass. They each contain the same amount of matter.
Hence, the correct option is D.
Since the rock, book, and can of soda all have the same mass, it means that they contain the same amount of matter, regardless of their size or the material they are made of.
Mass is a measure of the amount of matter in an object, so if their masses are equal, it implies that the quantity of matter is the same in each of them.
The size, shape, and material composition can be different for each object, but their masses remain the same in this scenario.
Hence, A rock, a book and a can of soda all have the same mass. They each contain the same amount of matter.
Hence, the correct option is D.
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seawater is denser than fresh water. a ship sailing from the atlantic ocean into the great lakes moves from seawater into fresh water. will the ship sink deeper into the water during this passage, stay the same level, or rise slightly? the following are student responses from a previous year. some of them may not be technically wrong but are incomplete explanations. choose the best, most complete explanation. group of answer choices salt water is more dense than fresh water so the ship will sink deeper when it sails into fresh water. the floating ship displaces exactly its own weight in water, so it will displace a smaller volume of the denser salt water than it would the less dense fresh water. a displaced fluid has the same mass as the total fluid. since fresh water is less dense than seawater the ship will sink deeper when passing from the atlantic ocean to the great lakes. the level at which a solid floats on a denser fluid depends on their relative densities. it seems that the boat would float better in denser water, but this is not so. displaced fluid has the same mass as the floating boat, so the boat will not sink any more in freshwater than it will in saltwater. in moving from seawater to freshwater, a boat will sink slightly, because to be in equilibrium, the weight must be equal, so more of it will sink. when the ship moves from seawater to fresh water, the ship will rise slightly. according to the archimedes' principle, the ship's height that it floats at is equal to the weight of the water displaced. less dense water will be displaced more, so the ship rises when it moves to less dense water.
Answers
When a ship moves from seawater into fresh water, it will rise slightly.
This is because seawater has a higher density than fresh water due to its salt content. As the ship moves into the fresh water, the water surrounding the ship becomes less dense and the ship will float higher in the water. This is known as the buoyant effect and occurs because the ship's weight is being supported by the water, and a decrease in water density means that the water is able to support the ship more effectively, causing it to rise. Therefore, the ship will rise slightly as it moves from seawater into fresh water.To know more about fluid mechanics visit:
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If an irregularly shaped object (such as a wrench) is dropped from rest in a classroom and feels no air resistance, it will If an irregularly shaped object (such as a wrench) is dropped from rest in a classroom and feels no air resistance, it will accelerate and turn about its center of gravity with uniform angular speed. accelerate and turn about its center of gravity with uniform angular acceleration. accelerate and turn until its center of gravity reaches its lowest point. accelerate and spin until its center of gravity reaches its highest point. accelerate but will not spin.
Answers
Answer:
It accelerate but will not spin.
Explanation:
If an irregular shaped object is dropped from rest without feeling any form of air resistance it will accelerate without spinning and this is due to the fact that there is no Torque around the center of gravity
A man is running with a tennis ball in his hand. On his left is a bull's-eye target painted
on the ground. As the man passes the target, he tries to drop the ball on it. The ball
falls to the side of the target, missing the bulls-eye. The ball did not drop straight
down under the force of gravity because the man also acted on the ball with
O a horizontal force.
O a downward force.
O an upward force.
O a backward force.
Answers
Answer: Horizontal force.
The ball did not drop straight down under the force of gravity because the man also acted on the ball with a horizontal force. So option A is correct
What is Force ?The definition of force is the pushing or pulling of anything. Push and pull are the result of two things interacting with one another. Stretch and crush are two more phrases that can be used to describe force.
The ball did not drop straight down under the force of gravity because the man acted on the ball with a horizontal force.
As the man runs, he moves the ball in a horizontal direction, which causes it to deviate from its straight-down trajectory under gravity and miss the bull's-eye target.
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Please help with these MCQs.
1. Filter absorbs __________________.
- only primary coloured lights
- only secondary coloured lights
- only tertiary coloured lights
- all colors of white light
2. The light that has passed through a filter, is always ______________.
- dim
- bright
- sharp
- blur
Answers
1. Filter absorbs all colors of white light.
2. The light that has passed through a filter, is always dim.
Which colors are being absorbed by the filter?The filter selectively transmits the red and blue portions of the incident white light spectrum, but absorbs most of the green wavelength.
Color filters absorb certain wavelengths of color and transmit the other wavelengths allowing them to be seen.
Therefore in conclusion, the right filter can reduce glare, increase contrast, and make lunar features pop.
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A plane wishes to fly due north to an airport which is 205 km away. The plane can fly at a speed in still air of 220 km/h. A wind of 43 km/h blows from east to west.
a. In which direction,relative to north, should the plane head to reach it’s destination?
b. How long does this take?
Answers
Answer:
nique ta mama
Explanation:
Place a fluid inside a sealed cylindrical container, then allow it to roll down an inclined plane under the influence of gravity five times. What do you think will happen to the speed of the container as you increase the temperature of the fluid by 10 degrees Fahrenheit each time?
Answers
The speed of the cylindrical container will increase as you increase the temperature of the fluid.
What is the speed of an object down inclined plane?
The speed of an object moving down an inclined plane is determined by applying Newton's second law of motion.
F(net) = ma
where;
F(net) is the net force on the objectm is the mass of the objecta is the acceleration of the objectThe net force on the object is determined by subtracting force of friction from the applied force and it is given as;
F(net) = F - Ff
F(net) = F - μmg
where;
μ is the coefficient of frictionm is the mass of the sealed cylindrical containerg is the acceleration due to gravityWhen the temperature of the fluid inside the sealed cylindrical container increases, the container becomes more light because the fluid will acquire more kinetic energy and kinetic frictional force resisting the motion of the container reduces and consequently the speed of the cylindrical container will increase.
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1-The amount of heat required to raise the temperature
of 1 g of a substance by degree celsius is
one
Answers
Answer:
• specific heat
1 Answer. The specific heat is the amount of heat required to raise the temperature of 1 g of substance by one degree Celsius or one Kelvin
A radar antenna is rotating and makes one revolution every 24 s, as measured on earth. However, instruments on a spaceship moving with respect to the earth at a speed v measure that the antenna makes one revolution every 44 s. What is the ratio v/c of the speed v to the speed c of light in a vacuum
Answers
Answer:
0.838
Explanation:
The ratio v/c of the speed v to the speed c of light in a vacuum is shown below:
Given that
\(\triangle t_0 = 24\ seconds\) = time interval for one revolution
\(\triangle t = 44\ seconds\) = time interval measured with speed v
based on the given information, the ratio v/c of the speed v to the speed c of light in a vacuum is
\(\triangle t = \frac{\triangle t_0}{\sqrt{1 - \frac{v^2}{c^2}}}\)
\({\sqrt{1 - \frac{v^2}{c^2}}} = \frac{\triangle t_0}{\triangle t}\)
Now squaring both the sides
\(\frac{v^2}{c^2} = 1 - \frac{(\triangle t_0)^2}{(\triangle t)^2}\)
Now remove the squaring root from both the sides and putting the values
\(\frac{v}{c} = {\sqrt{1 - \frac{(\triangle t_0)^2}{(\triangle t)^2}\)
\(= {\sqrt{1 - \frac{(24)^2}{(44)^2}\)
= 0.838
Assume that the temperature outside is 293 Kelvin but you’re familiar only with the Fahrenheit scale. Do you need to wear a hat and gloves when you go outside? To find out, convert the Kelvin temperature to Fahrenheit. (Hint: Convert the Kelvin temperature to Celsius first.)
Answers
Given,
The temperature in Kelvin, T_K=293 K
The temperature can be converted into Celcius using the formula,
\(T_C=T_K-273\)On substituting the known values,
\(\begin{gathered} T_C=293-273_{} \\ =20\text{ }\degree\text{C} \end{gathered}\)The temperature can be converted from Celcius to Fahrenheit using the equation,
\(T_F=(T_C\times\frac{9}{5})+32\)On substituting the known values,
\(\begin{gathered} T_F=20\times\frac{9}{5}+32 \\ =68\text{ }\degree\text{F} \end{gathered}\)Thus 293 K in Fahrenheit is 68 °F
An atom contains 18 neutrons and a mass number of 35. Which group and period with the atom belong to within the periodic table
Answers
These elements and atoms of chlorine have different atomic mass numbers. The isotope that has 18 neutrons has an atomic mass number of 35.
What element has a mass number of 35 and 18 neutrons?Some atoms of chlorine have 18 neutrons in their nuclei. further atoms of chlorine may have 20 neutrons in the nucleus, Element with atomic numeral 35 is Bromine (Br) and it belongs to group 17 of the periodic table. The designation of the element is sulfur and it is non-metal.
The electronic arrangement of the element with atomic number 18 is 2, 8, 8. Hence this element will lie in group 18 and in the third period of the periodic table.
So we can conclude that An element 'X' has a mass integer of 35 and a number of neutrons of 18.
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What type of wave does not need matter to carry energy?If y varies directly as x and y = 20 when x = 6, what is the value of y when x = 24?
a.
36
b.
80
c.
30
d.
4
Please select the best answer from the choices provided
A
B
C
D
Answers
As for the second question, we can use the direct variation formula:
y = kx
where k is the constant of variation. We can solve for k by plugging in the given values:
20 = k(6)
k = 20/6
Now that we know k, we can use it to solve for y when x = 24:
y = (20/6)(24) = 80
Therefore, the value of y when x = 24 is 80, which is option B.
17. Which of the following supports the idea that the genetic code is common to all living
things?
A. All living things share similar modes of reproduction
B. The same adaptations help all living things survive in the same way.
C. All living things have identical ways of using energy for survival.
D. All living things contain DNA with the same nitrogenous bases.
Answers
Answer:
Explanation:
genetic code us a keyword
different organisms have diff ways in reproducting
different ways of adapting to environments, obtianing energy, etc. It's mainly asking what makes all living things have something in common, like ALL all
gravity on the surface of the Moon is only 1/6 as strong as gravity on Earth.
Answers
Answer:
True,
Explanation:
Over the entire surface, the variation in gravitational acceleration is about 0.0253 m/s2 (1.6% of the acceleration due to gravity). Because weight is directly dependent upon gravitational acceleration, things on the Moon will weigh only 16.6% (= 1/6) of what they weigh on the Earth.
1.
Atennis ball is shot straight up with an initial velocity of 34 m/s. What is its velocity two seconds after launch?
Answers
Answer:
The speed (magnitude of the velocity) is 14.4 m/s
Explanation:
Vertical Launch Upwards
It occurs when an object is launched vertically up without taking into consideration any kind of friction with the air.
If vo is the initial speed and g is the acceleration of gravity, the speed vf at any time is calculated by:
\(v_f=v_o-g.t\)
A tennis ball is launched vertically up with an initial speed of vo=34 m/s. At time t=2 s, its speed is:
\(v_f=34-9.8*2\)
\(v_f=34-19.6\)
\(v_f=14.4\ m/s\)
The speed (magnitude of the velocity) is 14.4 m/s
A ball is attached to one end of a wire, the other end being fastened to the ceiling. The wire is held horizontal, and the ball is released from rest (see the drawing). It swings downward and strikes a block initially at rest on a horizontal frictionless surface. Air resistance is negligible, and the collision is elastic. The masses of the ball and block are, respectively, 1.70 kg and 2.50 kg, and the length of the wire is 1.21 m. Find the velocity (magnitude and direction) of the ball (a) just before the collision, and (b) just after the collision.
Answers
Just before the collision, the ball has a velocity of 9.3 m/s, downward. After the collision, the ball has a velocity of 6.2 m/s, upward.
To solve this problem, we can analyze the motion of the ball and block before and after the collision using the principles of conservation of energy and momentum. Since the collision is elastic, the total kinetic energy of the system is conserved. The ball has gravitational potential energy before the collision, which is converted to kinetic energy as it falls.
The block has no kinetic energy before the collision, but gains some after the collision due to the transfer of momentum from the ball. By equating the total kinetic energy before and after the collision and using the principle of conservation of momentum, we can solve for the velocities of the ball and block.
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(Score for Question 3: ___ of 8 points)
A 75 kg barrel is pulled up by a rope. The barrel accelerates at 3".4 m"/s^2. Find the force exerted on the barrel by the rope. Show all your work.
Answer:
Type your answer here.
Answers
Answer:
255N
Explanation:
Given parameters:
Mass of barrel = 75kg
Acceleration = 3.4m/s²
Unknown:
Force exerted = ?
Solution:
Force is the product of mass and acceleration according to Newton's second law of motion.
Force = mass x acceleration
Now insert given parameters and solve,
Force = 75 x 3.4 = 255N
The net force on the barrel is the sum of the pulling force (magnitude p, acting upward) and the barrel's weight (mag. w, opposing p ). So by Newton's second law,
∑ F = p - w = m a
p = w + m a
p = m g + m a
p = m (g + a)
p = (75 kg) (9.80 m/s² + 3.4 m/s²)
p = 990 N