Answer:
12.6 g
Explanation:
Since it has a half life of 10 years and the question asks for 30 years all you need to do is divide 100 in half 3 times
Kayla and her friends are setting up chairs for a school play each row will contain the same number of chairs Kayla knows that there are 96 chairs and all she wants there to be eight rows Kayla needs to know how many chairs, c, should be in each row. Which equation represents the situation. Which equation represents the situation
There are a total of 12 chairs in each row, and the scenario is represented by the equation 8c = 96.
What is algebraic Expression?Any mathematical statement that includes numbers, variables, and an arithmetic operation between them is known as an expression or algebraic expression. In the phrase 4m + 5, for instance, the terms 4m and 5 are separated from the variable m by the arithmetic sign +.
Given, there are 96 chairs and all Kayla wants there to be eight rows.
Let "c" be the number of chairs in each row,
Since there is a total of 96 chairs and 8 rows.
The equation for the situation is:
8 *c = 96
So,
In 8 rows there are a total number of chairs = 96
In each row, there are a total number of chairs = 96/8
In each row, there are a total number of chairs = 12
Therefore, the equation that represents the situation is 8c = 96 and there is a total of 12 chairs in each row.
Learn more about algebraic Expression here:
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PLEASE HELP!! ILL MARK BRAINLYEST!!!
A change in temperature causes a change in mass.
True
False
Answer:
False
Explanation:
A paint can is sitting on a ladder 20 m high. It has a mass of 7 kg. What is the
potential energy of the paint can?
Answer:
The answer is 1400 JExplanation:
The potential energy of a body can be found by using the formula
PE = mgh
where
m is the mass
h is the height
g is the acceleration due to gravity which is 10 m/s²
From the question we have
PE = 20 × 10 × 7
We have the final answer as
1400 JHope this helps you
A place Or object used for comparison to determine if something is in motion is called a what?
Answer:
[tex] \boxed{ \bold{ \sf{Reference \: point}}}[/tex]
A place or object used for comparison to determine if something is in motion is called a reference point .
✎ Explanation :
A reference point can be defined as a fixed point / place / object from which we compare the motion of an object. For example :
When we are travelling by bus , we are in motion with respect to a nearby tree. Here , the tree acts as a reference point or reference frame.Hope I helped!
Have a wonderful time ツ
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which sustainable practice is paired correctly with its impact on the environment.
Answer:
Answer: Creating more wind farms results in a reduction of fossil fuel use
Explanation:
Economical improvement is to make earth a superior spot for everybody, without wrecking the opportunities for the following ages. There are numerous Eco frameworks that should be in equilibrium for us to live here, the atmosphere framework is one of them. This framework guarantees that the atmosphere is right and the air transmits the perfect measure of sunlight based energy. With the destructive nurseries gases, (for example, Carbon dioxide) we stop up the air, this progressions the temperature of the earth that can influence our turn of events
How we use energy is extraordinarily significant. Oil and coal are tests of energy that we may run out of, utilizing energy that restore themselves (wind ranches) is useful for the planet. Wind, water and sun are maintainable.
Hope this Helps (✿◡‿◡)
Answer:
Answer: D.Creating more wind farms results in a reduction of fossil fuel use
Explanation:
The other name for 'net force' is 'unbalanced force'. What is the name of the force that could be applied to an object that would balance a net force and create a state of equilibrium?
Answer:
Friction
Explanation:
This is because friction tends to oppose the motion of an object. Since the unbalance force or net force causes a motion of the object, the frictional force would tend to oppose the object until it is large enough to balance the net force. When this is done, equilibrium is achieved.
At this instance, there is no net force acting on the object.
So, the forces on the object become balanced and in a state of equilibrium.
PLEASE HELP!! ILL MARK BRAINLYEST!!
All matter has mass and takes up space.
True
False
Answer: True
Explanation:
Mass is the amount of matter in an object. Everything is made up of matter.
Answer: true
Explanation: Matter is all the “stuff” that exists in the universe. It has both mass and volume. Mass measures the amount of matter in a substance or an object.
a bus moving at speed of 25m/s beginning to slow at rate 4m/s^2each second how long does it take to stop
Explanation:
Initial velocity is 25m/s i.e. u. Final velocity would be zero since the bus stopped. It is noted that the bus deccelartion of 4m/s, so the acceleration should be considered negative of 4m/s I.e. 4m/s. So using third law of motion i.e.
v^2 - u^2= 2as
(0)^2 - (25)^2= -2×4×s {Note here I used minus sign in acceleration}
-625 = -8×s
s=625 ÷ 8
s= 125 m
So bus would cover a distance of 125m before coming to rest.
Which layer cools with height and also has the earths weather in it
A the Troposphere
B The stratosphere
C The thermosphere
D the Mesosphere
Answer:
A) Troposphere
Explanation:
It is the lowest layer of the earth's atmosphere.
A pyrotechnical expert needs to fire a 15 kg projectile from a launching device that has a barrel length of 2 meters. The projectile will need to be launched horizontally 1 km in 5 seconds. Calculate the force needed to launch the projectile.
Answer:
The force needed to launch the projectile is 150000 N.
Explanation:
We can find the force using the following equation:
[tex] F = ma [/tex]
Where:
m: is the mass = 15 kg
a: is the acceleration
First, we need to find the acceleration of the projectile:
[tex] v_{f}^{2} = v_{0}^{2} + 2ax [/tex]
Where:
[tex]v_{f}[/tex]: is the final speed
[tex]v_{0}[/tex]: is the initial speed = 0
x: is the distance = 2 m
The final speed is:
[tex]v_{f} = \frac{1 km}{5 s}*\frac{1000 m}{1 km} = 200 m/s[/tex]
Then, the acceleration is:
[tex]a = \frac{v_{f}^{2}}{2x} = \frac{(200 m/s)^{2}}{2*2 m} = 10000 m/s^{2}[/tex]
Finally, the force is:
[tex]F = ma = 15 kg*10000 m/s^{2} = 150000 N[/tex]
Therefore, the force needed to launch the projectile is 150000 N.
I hope it helps you!
the answer will b bc grass hopppers cant swin
Answer:
ya thats right they cant swim
Explanation:
A child pulls on a toy locomotive of mass 0.979 kg with a force of 3.25 N to the right. The locomotive is connected to two train cars by cables. Friction in the axles results in an effective coefficient of kinetic friction between the floor and the train which is 0.110. One car has a mass of 0.952 kg and the other has a mass of 0.419 kg.
What is the acceleration of the train?
What is the tension in the cable between the locomotive and the car connected to the locomotive?
Hints: For part (a), consider the locomotive and the 2 cars to be one “object”.
For part (b). consider the “object” to be the 2 cars.
Answer:
(a) The acceleration of the train and cars is approximately 0.304 m/s²
(b) The tension between the locomotive and the car connected to the locomotive is approximately 0.4166 N
Explanation:
The given parameter are;
The mass of the toy locomotive = 0.979 kg
The mass of one car = 0.952 kg
The mass of the other car = 0.419 kg
The total mass of the train locomotive and cars = 0.979 + 0.952 + 0.419 = 2.35 kg
The weight of the train locomotive and cars = 9.81 m/s² × 2.35 kg = 23.0535 N
The normal force of the train and cars = The weight of the train locomotive and cars = 23.0535 N
The coefficient of dynamic friction = The normal force × The coefficient of dynamic friction
The coefficient of dynamic friction = 23.0535 × 0.110 = 2.535885 N
The applied force = 3.25
The net force acting on the train locomotive and cars = 3.25 - 2.535885 0.714115 N
(a) Force = Mass × Acceleration
Acceleration = Force/Mass
∴ The acceleration of the train and cars = 0.714115 N/(2.35 kg) ≈ 0.304 m/s²
(b) The tension between the locomotive and the car connected to the locomotive = T₂ = ( (m₁ + m₂)/ (m₁ + m₂ + m₃)) × F
Therefore, T₂ = ( (0.952 + 0.419)/ (0.952 + 0.419 + 0.979)) × 0.714115 ≈ 0.4166 N.
How to calculate maximum height, when i know only V
Pleeeaaassseee as fast as you can
Answer: was it this problem?
Explanation:
PLEASEEE HELPPP...Balance the following equation: _ Hv2_0v2--> Hv20
(the v is meant to show the following Tasks:
WILL GIVE BRAINLIEST
Answer:
The boat will go faster.
Explanation:
Help me with this please!
Answer:
b i. The curve would be less steep than both of the graphs.
c. The temperature was the same at the start of the experiment so that the only variable changed in the experiment would be the thickness of the walls and the change in temperature can be measured from the same starting temperature, ensuring a fair experiment.
Explanation:
b i. Since you know that a thicker wall conducts heat from the inside room to the surroundings slower (based on my previous answer ;)), heat from the room would be conducted to the surroundings by the thicker wall slower and the temperature change will be less drastic and the graph would be less steep.
c. In an experiment, only one independent variable can be changed and we would normally record the dependent variable to get a conclusion for the experiment as the dependent variable is the variable that is affected by the independent variable. We should not change any other variable in the experiment, such as the starting temperature of the experiment.
For e.g. If you want to find out how the amount of water affects a plant's growth, the amount of water would be the independent variable and that would be the only thing you would change in that experiment. During the experiment, you would record the dependent variable, which is the height of the plant. The type of plants used and the type of soil..etc should be kept the same/constant so that it is a fair experiment, as a better type of soil may make the plant grow taller.
A rocket has a mass of 80,000 kg and accelerates at a rate of 35 m/s2. Calculate the force that provides this acceleration.
The amount of force that provides an acceleration of 35m/s² with a mass of 80,000kg is 2,800,000N.
HOW TO CALCULATE FORCE:
The force applied on an object can be calculated by multiplying the mass of the object by its acceleration. That is;Force (N) = mass (kg) × acceleration (m/s²)According to this question, a rocket has a mass of 80,000 kg and accelerates at a rate of 35 m/s². The force can be calculated as follows:F = 80,000kg × 35m/s²F = 2,800,000NTherefore, the amount of force that provides an acceleration of 35m/s² with a mass of 80,000kg is 2,800,000N.Learn more at: https://brainly.com/question/20207503?referrer=searchResults
What effect do you think thermal energy and the transfer of heat in Earth’s interior have on the surface of the planet?
A.
They cause the seasons to change.
B.
They cause the plates to move around.
C.
They cause the average global temperature to rise.
Answer:
C
Explanation:
The sun's radiation strikes the ground, thus warming the rocks. As the rock's temperature rises due to conduction, heat energy is released into the atmosphere, forming a bubble of air which is warmer than the surrounding air. This bubble of air rises into the atmosphere.
Answer:
A
Explanation:
It’s cold in the winter
hot in the summer
and in spring it’s warm
Jupiter is made of gas(like Saturn, Uranus and Neptune). What would happen to the strength of gravity if you
a) moved away from Jupiter
b)Fell in to Jupiter
PLS HELP ME OMG ITS DUE TOMOROW AND I HAVE NO CLUE WHAT TO DO BEST EXPLANATION GETS BRAINLIEST
Answer:
a) The strength of gravity decreases if one moved away from Jupiter
b) The strength of gravity increases if one fell into Jupiter
Explanation:
The gravitational attraction is given by Newton law of gravitation as follows;
[tex]Force \ (strength) \ of \ gravity = \dfrac{G \times M \times m}{R^2}[/tex]
Where;
G = The universal gravitational constant = 6.67408 × 10⁻¹¹ m³/(kg·s²)
M = The mass of Jupiter
m = The mass of the nearby body
R = The distance between the centers of Jupiter and the body
From the equation, we have that the gravitational strength varies inversely with the square of the separation distance between two bodies
Therefore, as one moves away, R increases, and the strength of gravity reduces
Similarly as the body falls into Jupiter, R, reduces the gravitational strength increases.
The transfer of heat by the movement of a fluid is called: Think about it: Imagine a pocket of air over the land (“land air”), and another pocket of air over the ocean (“ocean air”).
Which air pocket would you expect to heat up more during the day?
Why?
Answer:
The transfer of heat by the movement of fluid is called Convection Heat Transfer
Explanation:
Heat transfer by convection is the transfer of heat by fluid transport from one place to another, such that convection takes place when the heat that comes in contact of fluid containing body is moved to other parts of the container by the transporting fluid
Heat is transferred within a fluid medium mainly by convection (movement of heat by the transfer of fluid particles in the medium)
Convection heat transfer is a combination of conduction and advection heat transfer
A .422 kg coffee mug rests on a table top 0.63 m above the floor. What is the potential energy of the mug with respect to the floor?
Answer:
2.61 J
Explanation:
Since potential energy U = mgy where m = mass of object, g = acceleration due to gravity = 9.8 m/s² and y = height of object above the ground.
Now for the coffee mug, m= 0.422 kg and it is 0.63 m on a table, so it is 0.63 m above the ground. Thus, y = 0.63 m.
We compute U
U = mgy
= 0.422 kg × 9.8 m/s² × 0.63 m
= 2.605 J
≅ 2.61 J
So, the potential energy of the mug with respect to the floor is 2.61 J
HELP ASAP!!!
The development of the periodic table created predictable trends. What trend
does electronegativity follow?
Answer:
electronegativity increases from left to right
Explanation:
took quiz
car sitting on a drive way is that an kinetic or potential energy
Answer:
kinetic energy..........
PLEASE HELP!! ILL MARK BRAINLYEST!!
MORE THAN ONE
When an acid and a base are mixed, the excess ions:
A. combine to form water
B. increase
C. decrease
D. neutralize each other
Answer:
decrease and neutralize each other
Explanation:
In a car engine, what type of energy is released at a high level, leading to inefficiency?
A. Mechanical
B. Electrical
C. Chemical
D. Thermal
please help!!!!!!!!!!
Answer:
C. Acceleration due to gravity
Explanation:
which is 9.8 m/s2 on Earth. The formula for calculating weight is F = m × 9.8 m/s2.
What variables have the most effect on the strength of the gravitational attraction between two massive objects?
Help
Answer:
The distance between the 2 centers of the object.
Explanation:
If it's harder to win a super bowl for the rams than the gravity means the chiefs will win it.
8) A block of lead has dimensions of 4.50 cm by 5.20 cm by 6.00 cm. The block weighs 1587 g. From this information, calculate the density of lead.
9) 28.5 g of iron shot is added to a graduated cylinder containing 45.50 mL of water. The water level rises to the 49.10 mL mark, from this information, calculate the density of iron.
10) What volume of silver metal will weigh exactly 2500.0 g. The density of silver is 10.5 g/cm3.
Answer:
[tex]11.3\ \text{g/cm}^3[/tex]
[tex]7.92\ \text{g/cm}^3[/tex]
[tex]238.1\ \text{cm}^3[/tex]
Explanation:
8) Volume of lead
[tex]V=4.5\times 5.2\times 6\\\Rightarrow V=140.4\ \text{cm}^3[/tex]
m = Mass of block = 1587 g
Density is given by
[tex]\rho=\dfrac{m}{V}\\\Rightarrow \rho=\dfrac{1587}{140.4}\\\Rightarrow \rho=11.3\ \text{g/cm}^3[/tex]
Density of lead is [tex]11.3\ \text{g/cm}^3[/tex]
9) Volume of lead = Volume of water displaced = (49.1-45.5) = 3.6 mL = [tex]3.6\ \text{cm}^3[/tex]
m = Mass of iron = 28.5 g
Density is given by
[tex]\rho=\dfrac{m}{V}\\\Rightarrow \rho=\dfrac{28.5}{3.6}\\\Rightarrow \rho=7.92\ \text{g/cm}^3[/tex]
The density of iron is [tex]7.92\ \text{g/cm}^3[/tex]
10) m = Mass of silver = 2500 g
[tex]\rho[/tex] = Density of silver = [tex]10.5\ \text{g/cm}^3[/tex]
Volume is given by
[tex]V=\dfrac{m}{\rho}\\\Rightarrow V=\dfrac{2500}{10.5}\\\Rightarrow V=238.1\ \text{cm}^3[/tex]
The volume of silver is [tex]238.1\ \text{cm}^3[/tex]
What is the speed of gravity on Earth?
(Free question if your learning physics!)
Answer:
25038.72 mph (filler please ignore)
Answer:
Ignoring the effects of air resistance, the speed of gravity on Earth is 9.81 m/s 2.
Explanation:
Which of the following would result in the biggest INCREASE in erosion by a river