Answer:
75g
Explanation:
Given parameters
Mass of product = 375g
Mass of reactant X = 300g
Unknown:
Mass of reactant Y = ?
Solution:
To solve this problem, we need to understand the law of conservation of mass. The law states that "matter is neither created nor destroyed in a chemical reaction".
So;
Mass of X + Mass of Y = Mass of product
Mass of Y = Mass of product - Mass of X
Mass of Y = 375 - 300 = 75g
are clocks permanently stuck to walls?
Answer:
It depends
Explanation:
what is this question
Answer:
No...
Explanation:
I think this may be a trick question... so from my reasonable logic, I'm gonna say no because more often then not they are attached to the wall with nails/screws. Or they are hanging.
So they could come off. Also if someone was desperate, they could always grab a chainsaw and force it off of the wall. Not a great idea though, then the wall would be broken!! Most likely the clock too!
Because the electrons in a molecule of hydrogen fluoride (HF) are more strongly pulled toward the fluorine atom, the molecule is nonpolar.
Please select the best answer from the choices provided
T
F
Answer:
false
Explanation:
this makes the molecule very polar
Can anyone help me with this? I really need the help
for each of them you need to type how they make you feel when you like need to make decision
Explanation:
The term for Italian Opera
Answer:
Opera seria,
Explanation:
Complete the sentence by typing the word that correctly fills the blank Fossil fuels are formed gradually over _______
of years.
Enter your answer
The strength of an electrical field decreases as you move farther from the source.
True or False
In an atom, an electron that is close to the nucleus is on the highest energy level.
Please select the best answer from the choices provided
T
F
Natural Resources Question 5
Which statement describes an advantage of using renewable
resources?
Select one
-They make energy more affordable
-They will increase the demand for electricity
-They will be available for many years.
-They make electricity less dangerous.
Answer:
-They will be available for many years.
Explanation:
The advantage of using renewable resources is that they will be available for many years.
Renewable resources have very fast turn over time for replenishing, therefore, they are available over an extended period time.
They are not used by consumption and so they will continually be available. This is different from the non-renewable resources which are depleted as they are being used up.
Examples of renewable resources are wind, water and air
HELP ME PLEASE
Which of the following is true about the International Space Station?
A. It is on the surface of Mars.
B. It is the size of ten football fields.
C. It was built from separate parts sent to space.
D. It was a partnership between the US and Soviet Union
Please
Answer:
The answer is C. Its not on mars and its not 10 football feilds its only 1
The International Space Station was built from separate parts sent to space.
What is International Space Station?A sizable spacecraft in orbit orbiting the Earth is called the International Space Station. Crews of astronauts and cosmonauts reside there as a home. The space station serves as an exceptional science lab. The space station was created and used by international cooperation.
The components of the space station were put together by astronauts while they were in space. It travels around 250 miles above Earth's surface on its typical orbit. It has a speed of 17,500 mph. It therefore orbits the planet every 90 minutes. The space station is being used by NASA to learn more about surviving and operating in space. These discoveries will enable sending more people into space than ever before.
For the entire space station, there is no set ownership stake. Instead, each partner should maintain authority and control over the elements it registers and over employees in or on the Space Station who are its nationals, according to Article 5 of the IGA. As a result, only one partner holds sole control of each ISS module. However, the contracts for using the space station's amenities are more intricate.
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Describe how and why molecular movement and position will change when heat is added.
Answer:
the molecules well speed up
Explanation:
Answer: As heat energy is added to the solid, the kinetic energy of the molecules increases and their vibrations speed up. The molecules move farther away from their fixed positions and farther away from each other.
Explanation:
A group of students left school at 8:00 am on a field trip to a science museum 90 miles away. Which best describes the average speed of the bus if they arrived at the museum at 10:00 am?
Answer:
45
Explanation:
because the equation for speed is distance divided by time! hope that helps gave a nice day!
The speed of the group of students is their total distance divided by the time taken to travel. The speed to cover 90 miles in 2 hours is 45 miles/hour.
What is speed ?Speed is a physical quantity measuring the distance covered by an object within unit time. Speed is a scalar quantity. The rate of speed is called velocity. The unit of both quantities in common is m/s.
If an object covers more distance within small time, the object is said to have a greater speed. The speed of the object is the ratio of its change in distance to the change in time.
Given that, distance covered by the traveler = 90 miles
time taken = 10 -8 = 2 hours
speed = distance/ time
speed =90 miles /2hrs = 45 mph
Therefor, the average speed of the students is 45 miles per hour.
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4. Which problem is most likely to result from the use of nuclear power?
O A. storage of radioactive wastes
B. miners getting trapped underground
C. oil spills that pollute oceans and beaches
O D. pollutants in the groundwater after drilling
Answer:
i think it is A
Explanation
A car is traveling in a race. The car went from the initial velocity of 35 m/s to the final velocity of 65 m/s in 5 seconds. What is the acceleration? 0-13 m/s2 0-6 m/s2 0.6 m/s2 O 13 m/s2
Answer:
6m/s²
Explanation:
Given parameters:
Initial velocity = 35m/s
Final velocity = 65m/s
Time taken = 5s
Unknown:
Acceleration = ?
Solution:
Acceleration is the rate of change of velocity with time taken;
Acceleration = [tex]\frac{Final velocity - Initial velocity }{time}[/tex]
So;
Acceleration = [tex]\frac{65 - 35}{5}[/tex] = 6m/s²
A spring has a spring constant of 800 N/m. How much work must be done to stretch the spring 0.4 m from its unstretched position?
A. 64.0 J
B. 160.0 J
C. 320.0 J
D. 640.0 J
Answer:
A. 64.0 J
Explanation:
Given parameters:
Spring constant = 800N/m
Extension = 0.4m
Unknown:
Work done = ?
Solution:
The work done in a string is given as:
Work done = [tex]\frac{1}{2}[/tex] x 800 x 0.4² = 64J
Why do we see Moon phases?
Answer:
The moon its self does not generate life.
Explanation:
Moon phases are determined by the relative positions of the Moon, Earth, and Sun. Instead, the Moon's phase depends only on its position relative to Earth and the Sun. The Moon doesn't make its own light, it just reflects the Sun's light as all the planets do. The Sun always illuminates one half of the Moon.
{ hope this helps T-T }
What is the unit of measure for the rate at which electricity flows?
That's the Ampere.
1 Ampere = 1 Coulomb of charge per second.
Which measurement can be made using a micrometer screw gauge?
The turning effect of a spanner
The wavelength of microwaves
The diameter of a wire
The air pressure of a tyre
Answer:
C. The diameter of a wire
Explanation:
A micrometer screw gauge is a device used for the measurement of small dimensions which may not be measured accurately by the use of a vernier caliper, e.g diameter of a thin wire. it has a high degree of accuracy.
From the given option in the question, the measurement that can be made using a micrometer screw gauge is the diameter of a wire
The measurement that should be used via using the micrometer screw gauge is option C. The diameter of a wire
What is a micrometer screw gauge?It is the device that should be used for measuring the small dimension that should not be measured in an accurate way via the use of an vernier caliper. Also, it contains the high accuracy degree. So the measurement should not be done by turning effect, microwaves wavelength, tyre air pressure
Therefore, the option c is correct.
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earth recycles water through select all that apply
1 distillation
2 precipitation
3 condensation
4 evaporation
5 sequestration
Answer:
evaporation to condensation to precipitation.
Answer:
evaporation to condensation to precipitation.
Explanation:
how much time would it take for the sound of thunder to travels at a speed of 330m/seconds
Cowbirds follow groups of cows, or other grazing animals, eating the insects kicked up by the walking animals. The herbivores are not bothered by the cowbirds. This relationship is an example of:
a
Competition
b
Commensalism
c
Predation
d
Mutualism
Answer:
d: mutualism
Explanation:
I'm guessing that means they're on mutual grounds so they don't mind sharing?
4. Can an object's displacement be negative? What does the sign indicate about the
displacement?
Answer:
1. Displacement can be positive OR negative. The sign implies the direction of the displacement. 2. In one dimension the direction is indicated by the sign: negative if to the left and positive if to the right.
Explanation:
49. A vertically hung 0.50-meter- long spring is stretched from its equilibrium position to a length of 1.00 meter by a weight attached to the spring. If 15 joules of elastic potential energy are stored in the spring , what is the value of the spring constant?
Answer:
[tex]K=120[/tex]
Explanation:
From the question we are told that
Length of spring [tex]l_1=0.5m[/tex]
Length of stretched [tex]l_s=1m[/tex]
Potential energy of spring [tex]E=15J[/tex]
Generally equation for energy stored is mathematically given as
[tex]U=1/2K \triangle x^2[/tex]
[tex]K=\frac{2U}{\triangle x^2}[/tex]
[tex]K=\frac{2*15}{ 0.5^2}[/tex]
Therefore value of the spring constant in N/m? is given as
[tex]K=120[/tex]
The value of the spring constant is 120 N/m.
Spring constant
The spring constant of the spring is calculated by applying the principle of conservation of energy as follows;
[tex]\frac{1}{2} k \Delta x = U[/tex]
Where;
K is the spring constantΔx is the extensionU is the elastic energyThe value of the spring constant is calculated as follows;
[tex]k = \frac{2U}{\Delta x} \\\\k = \frac{2\times 15}{0.5^2}\\\\k = 120 \ N/m[/tex]
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A freight train has a mass of 270, 700 kg and has an acceleration of 40 m/s2. How much force is acting on the train? Formula:
Answer:
1.08 x 10⁷N
Explanation:
Given parameters:
Mass of freight train = 270700kg
Acceleration = 40m/s²
Unknown:
Force acting on the train = ?
Solution:
From Newton's second law of motion, we know that:
Force = mass x acceleration
So;
Force = 270700 x 40 = 1.08 x 10⁷N
An 8 kilogram cannonball is loaded into a 1000 kilogram stationary cannon. When fired horizontally the velocity of the cannonball is 300 meters per second east. Determine the cannon's recoil velocity.
Answer:
The recoil velocity of the cannon is 2.38 m/s.
Explanation:
Given;
mass of cannonball, m₁ = 8 kg
mass of stationary cannon, m₂ = 1000 kg
initial velocity of the cannonball, u₁ = 300 m/s
initial velocity of the cannon, u₂ = 0
Let the recoil velocity of the cannon, = v
Apply the principle of conservation of linear momentum;
m₁u₁ + m₂u₂ = v(m₁ + m₂)
8(300) + 1000(0) = v(8 + 1000)
2400 = v(1008)
v = 2400/1008
v = 2.38 m/s
Therefore, the recoil velocity of the cannon is 2.38 m/s.
A bowling ball with a mass of 9 kg is moving at a speed of 4 m/s. What is its
kinetic energy?
O A. 144 J
O B. 72J
O C. 18J
O D. 36 J
Help please!!
the gravitational force between the sun and earth is larger than sun and the moon. what do you think the reason for this is?
Answer: The greater an object's mass, the more gravitational force it exerts.
Explanation: So, to begin answering your question, Earth has a greater gravitational pull than the moon simply because the Earth is more massive. Sorry if I get this wrong. I am in 5th grade! ♥
The gravitational attraction between the Sun and Earth is stronger than the attraction between the Sun and the Moon, principally because of the Sun's greater mass and greater distance from Earth.
An object's mass affects how much gravitational pull it exerts. Both the Earth and the Moon are much less massive than the Sun. Approximately 330,000 times more massive than the Earth, and roughly 27 million times more massive than the Moon, is the Sun. Because of the Sun's greater mass, its gravitational pull is thus much stronger.
The strength of the gravitational force between two objects is greatly influenced by their distance from one another. The Sun and Earth are separated from one another by a far smaller distance than the Sun and Moon. The Sun is located roughly 150 million kilometers from Earth, while the Moon is located roughly 384,400 kilometers from the Sun on average. The inverse square law asserts that the gravitational force decreases with increasing distance, and that it is only one-fourth as strong when two objects are twice as far apart.
Hence, the gravitational force between the sun and earth is larger than the sun and the moon due the mass of the sun and earth is greater than the moon and sun. The distance between the sun and the earth is comparatively smaller than the distance between the sun and the moon.
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A rock falls off a cliff with an acceleration of -9.8 m/s^2 and hits the ground 5 s later . How high is the diff?
13. Explain whether the following answers are reasonable or not. Check the magnitude, the units, and the
direction. You DO NOT have to solve the problems yourself.
a) A car speeds up as it enters the freeway. It accelerates at 5.4 m/s? What was the car's final speed?
ANSWER: 6.3 m/s forward
I
10)A car is moving from rest and attained a velocity of 80 m/s. Calculate the
acceleration of the car after 5 s?
Answer:
initial velocity (u)=0
final velocity (v)=80m/s
time(t)=5s
acceleration (a)=?
Explanation:
we have
v=u+at
80=0+a×5
5a=80
a=80/5=16m/s²
Can music exist without the elements?
Answer:no
Explanation: