Answer:
220
Explanation:
5500 divided by 25 is 220
Answer:
it's easy the answer is 500 just multiple 500 times 25 and you will get 5500
Discuss the pros and cons of one of the examples of variations in family life – cohabitation, single-parent households, same-sex couples.
Answer:
a pro to single parent house holds is no favorite parent and a chance to have a better bond with your child a con could be money trouble or jealousy of others with to parents. a pro to same sex couples could be the children could learn to be accepting of others and their differences a con could be the children might be bullied by trashy homophobes at their school and other places for have same sex parents. i did both so you could chose
A train starts from rest at station A and accelerates at 0.5 m/s 2 for 60 s. Afterwards it travels with a constant velocity for 15 min. It then decelerates at 1 m/s2 until it is brought to rest at station B. Determine the distance between the stations.
Answer:
d = 28,350 m.
Explanation:
We can divide the problem in 3 parts, according to the type of movement that train had:A distance traveled while the train was speeding up.A distance traveled at constant speed.A distance traveled while the train was slowing down.For the first part, we can get the distance traveled using the kinematic equation for the displacement, starting from rest, as follows:[tex]x_{1} = \frac{1}{2} * a * t^{2} = \frac{1}{2} *0.5m/s2* (60s)^{2} = 900 m. (1)[/tex]
In order to get the final speed at this distance, we can simply apply the definition of acceleration, in this way:[tex]v_{f1} = a* t = 0.5 m/s2 * 60 s = 30 m/s (2)[/tex]
Since the second part is traveled at a constant speed, we can find the displacement applying the definition of average velocity, as follows:[tex]x_{2} = v_{f1} * t = 30 m/s* 60 s* 15 = 27,000 m (3)[/tex]
Finally, as we know the value of the deceleration, and that the final velocity is zero from the givens, we can apply the following kinematic equation to get the displacement during the third stage:[tex]v_{f3}^{2} - v_{o3} ^{2} = 2* a_{3} * x_{3} (4)[/tex]
Replacing by the values and solving for x₃, we get:[tex]x_{3} = \frac{v_{o3}^{2}}{2*a_{3} } = \frac{(30m/s)^{2}}{2*1m/s2} = 450 m (5)[/tex]
The total distance d is just the sum of x₁, x₂ and x₃, from (1), (3) and (5), as follows:d = x₁ + x₂ + x₃ = 900 m + 27,000 m + 450 m = 28,350 m.How much heat is needed to raise the temperature of an empty 2.0 x 101 kg vat made of
iron from 10.0ºC to 90.0ºC?
Answer:
Q = 7272 Kilojoules.
Explanation:
Given the following data;
Mass = 2.0*101kg = 202kg
Initial temperature, T1 = 10°C
Final temperature, T2 = 90°C
We know that the specific heat capacity of iron = 450J/kg°C
*To find the quantity of heat*
Heat capacity is given by the formula;
[tex] Q = mcdt[/tex]
Where;
Q represents the heat capacity or quantity of heat. m represents the mass of an object. c represents the specific heat capacity of water. dt represents the change in temperature.dt = T2 - T1
dt = 90 - 10
dt = 80°C
Substituting the values into the equation, we have;
[tex] Q = 202*450*80[/tex]
Q = 7272KJ or 7272000 Joules.
When a box is placed on an inclined surface with no friction, it will:
Answer: With no friction, the box will accelerate down the ramp
Explanation:
An object is projected from the ground with an upward speed of ų m/s has a speed of 23m/s when it is at a height of 5m above the ground .Use work energy principle to determine the initial speed u.
Answer:
25.08m/s
Explanation:
mgh1 + 0.5mv1² = mgh2 + 0.5mv2²
h1 = 0m
v1 = u
h2 = 5m
v2 = 23m/s
putting the values into the formula above;
m(10)(0) + 0.5m(u²) = m(10)(5) + 0.5m(23²)
0 + 0.5mu² = 50m + 264.5m
0.5mu² = 314.5m
dividing through by m
0.5u² = 314.5
u² = 629
u = 25.08m/s
Therefore, the initial speed "u" = 25m/s
Suppose you have a coffee mug with a circular cross section and vertical sides (uniform radius). What is its inside radius if it holds 370 g of coffee when filled to a depth of 5.50 cm?
Answer:
r = 4.62 cm
Explanation:
Mass of a coffee, m = 370 g
Height of the mug, h = 5.5 cm
We need to find the inside radius of the mug. Density of an object is equal to the mass per unit volume. It can be given by :
[tex]d=\dfrac{m}{V}\\\\d=\dfrac{m}{\pi r^2 h}\\\\r=\sqrt{\dfrac{m}{\pi dh}}\\\\r=\sqrt{\dfrac{370\ g}{\pi \times 1\ g/cm^3\times 5.5\ cm}}\\\\r=4.62\ cm[/tex]
So, the inside radius is 4.62 cm.
I REALLY NEED HELP!!! I WILL EVEN VENMO!
The free-body diagram shown above represents a car being pulled by a towing cable. In the diagram what is the gravitational force acting on the car?
I NEED WORK SHOWN!!!
Answer:
can u buy me a giftcard ill have this done in no time
Explanation:
A force of 10 newtons toward the right is exerted on a
wooden crate initially moving to the right on a horizontal
wooden floor. The crate weighs 25 newtons.
1. Calculate the magnitude of the force of friction between the crate and the floor.
2. What is the magnitude of the net force acting on the crate?
Answer:
Explanation:
coefficient of kinetic friction of wooden floor μ = .4
force of friction = μ R , R is reaction force of floor
R = mg = weight of body
R = 25 N
force of friction = .4 x 25 = 10 N
Net force on the crate = 10 - 10 = zero .
Net force on the body will be nil.
An object accelerates 2.0 m/s2 when a force of 25.0 Newtons is applied to it. What is the mass of the object?
Answer:
12.5 kgExplanation:
The mass of the object can be found by using the formula
[tex]m = \frac{f}{a} \\ [/tex]
f is the force
a is the acceleration
From the question we have
[tex]m = \frac{25}{2} \\ [/tex]
We have the final answer as
12.5 kgHope this helps you
How does radiation differ from conduction? (4 points)
Pushing a door closed is an example of force. true or false
Answer:
True
Explanation:
I am not 100% on the answer for this question but i hope it was right
Pushing is a force so that statement is true
why might someone buy a more expensive CFL intead of an incandescent light bulb ?
Answer:
Even though CFL are more expensive, they tend to last longer. Research proves that CFL uses 1/4 to 1/3 the same amount of energy to produce the same lighting as an incandescent light bulb (source: enhso.com)
A transformer has an output coil with 6 times as many turns as the input coil. If the input frequency is f then the output frequency will be:_______
a. 9f
b. 6f
c. 1/6 f
d. f
Answer:
d. f
Explanation:
Based on the principle of operation of transformer, when a.c voltage is applied at the terminal of the primary coil (input coil), an alternating magnetic flux is produced in the iron core which links the secondary coil (output coil).
Also, an alternating e.m.f of the same frequency as that of primary coil (input coil) will be induced in the secondary coil (output coil) by mutual inductance.
Thus, If the input frequency is "f" then the output frequency will be "f" (since the frequency will be the same).
The correct option is "D"
In 3 meters a person running 0.5 m/s accelerates 1.2 m/s 2. How fast were they going afterward? Choose the right equation for this word problem from below.
Answer:
2.72 m/s
Explanation:
In 3 meters a person running 0.5 m/s accelerates 1.2 m/s².
It means,
Distance, s = 3 m
Initial velocity, u = 0.5 m/s
Acceleration, a = 1.2 m/s²
We need to find the final velocity of the person. Using equation of motion to find it as follows :
[tex]v^2-u^2=2as\\\\v^2=2as+u^2\\\\v^2=2\times 1.2\times 3+(0.5)^2\\\\v=2.72\ m/s[/tex]
So, the final velocity of the person is 2.72 m/s.
Upon being struck by 240-nm photons, a metal ejects electrons with a maximum kinetic energy of 2.97 eV. What is the work function of this metal?
Answer:
Work Function = 3.53 x 10⁻¹⁹ J = 2.2 eV
Explanation:
The work function of the metal metal can be found as follows:
Energy of Photon = Work Function + K.E
hc/λ = Work Function + K.E
Work Function = hc/λ - K.E
where,
h = Plank's Constant = 6.625 x 10⁻³⁴ J.s
c = speed of light = 3 x 10⁸ m/s
λ = wavelength of photons = 240 nm = 2.4 x 10⁻⁷ m
K.E = Maximum Kinetic Energy = (2.97 eV)(1.6 x 10⁻¹⁹ J/1 eV) = 4.752 x 10⁻¹⁹ J
Therefore,
Work Function = (6.625 x 10⁻³⁴ J.s)(3 x 10⁸ m/s)/(2.4 x 10⁻⁷ m) - 4.752 x 10⁻¹⁹ J
Work Function = 8.281 x 10⁻¹⁹ J - 4.752 x 10⁻¹⁹ J
Work Function = 3.53 x 10⁻¹⁹ J = 2.2 eV
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Answer:
ok
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Explanation:
Answer:
okay
Which energy source has no greenhouse gas emissions or health impacts on humans, but is only
available in certain geographic locations?
Answer: geothermal
Explanation:
The geothermal energy source has no greenhouse gas emissions or health impacts on humans.
What is geothermal energy?Geothermal energy can be described as the thermal energy in the Earth's crust which arises from the formation of the planet and from the radioactive decay of materials.
The high temperature in Earth's interior cause rock to melt and solid mantle to behave plastically. The mantle convects upward since it is lighter than the surrounding rock. Temperatures at the core-mantle boundary reach over 4000 °C.
Geothermal heating can use water from hot springs and geothermal power means the generation of electricity from geothermal energy, which has gained importance.
Earth's geothermal resources are more than adequate to supply humanity's energy needs, although a small fraction is currently being profitably exploited, commonly in areas near tectonic plate boundaries.
The greenhouse gas emissions of geothermal stations are on average 45 g of CO₂ per kWh of electricity or less than 5% of that of conventional coal-fired plants.
Learn more about Geothermal energy, here:
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