Answer:
Heat Lost = (120 - 12.6) deg * 170 g * S = `18260 gm-deg * S
Heat Gained = (12.6 - 10) deg * 200 gm* 1 cal/ gm-deg - 520 cal
S = 520 / 18260 cal / gm-deg = .0285 cal / gm-deg
Since Heat Lost = Heat Gained
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Research revealed that patients who received chemotherapy in a hospital setting subsequently experienced
a(n) immune response when they again visited the hospital. In this example, the would be
classified as the US.
O enhanced; hospital
O suppressed; hospital
о
enhanced; chemotherapy
O suppressed; chemotherapy
Answer: suppressed; chemotherapy
Explanation:
Chemotherapy is typically a drug treatment whereby powerful chemicals are used to kill the fast growing cells in ones body. Chemotherapy is usually used in the treatments of cancer.
Research revealed that patients who received chemotherapy in a hospital setting subsequently experienced
a (suppressed) immune response when they again visited the hospital. In this example, the (chemotherapy) would be classified as the US.
A bicycle with a mass of 100kg hit a wall at an acceleration of 4 m/s2, what is the force?
Answer:
400N
Explanation:
F= ma
F= 100 x 4
F= 400N
Which statement is the best interpretation of the ray diagram shown?
A. A convex lens forms a larger, virtual image. B. A convex lens forms a larger, real image.
C. A convex mirror forms a larger, real image.
D. A convex mirror forms a larger, virtual image.
Answer:
a convex lens forms a larger, virtual image
Explanation:
The ray diagram shows that a convex lens forms a larger, virtual image. So, option a is correct.
What is meant by a convex mirror?A convex is defined as a lens in which the reflecting surface is bent inwards. It is thicker in the middle and thinner at the edges.
Here,
The convex lenses are the type of lens that can converge the beam of light coming from outside and reflect the rays and focus them on a point at the other side.
Convex lens is also known as a converging lens.
The image of the object here is formed on the opposite side of the object, so it is a virtual image that has been formed here.
The size of the image formed here is larger when compared to the size of the object. Thus larger image formed.
Thus the convex lens formed a larger and virtual image of the object here.
Hence,
The ray diagram shows that a convex lens forms a larger, virtual image. So, option a is correct.
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Se aplica una fuerza de 8N a un cochecito de 650 gramos. Calcula: a) aceleración, b)espacio recorrido en 5 segundos y c) velocidad a los 3 segundos si parte del reposo
Respuesta:
a) 12.3 m/s²
b) 153.75 m
c) 36.9 m/s
Explicación:
Paso 1: Información provista
Fuerza aplicada (F): 8 NMasa del cochecito (m): 650 gPaso 2: Calcular la aceleración (a) del cochecito
Usaremos la segunda ley del movimiento de Newton.
F = m × a
a = F/m = 8 N / 0.650 kg = 12.3 m/s²
Paso 3: Calcular el espacio recorrido (x) en 5 segundos (t).
Usaremos la siguiente fórmula cinemática para un movimiento rectilineo uniformemente acelerado.
x = 1/2 × a × t²
x = 1/2 × 12.3 m/s² × (5s)² = 153.75 m
Paso 4: Calcular la velocidad (v) a los 3 segundos si parte del reposo
Usaremos la siguiente fórmula cinemática para un movimiento rectilineo uniformemente acelerado.
v = a × t
v = 12.3 m/s² × 3 s = 36.9 m/s
Los cálculos dados serían los siguientes:
a). Aceleración = 12,3 m / s ^ 2
B). Distancia recorrida en 5 segundos = 153,75 m
C). Velocidad en 3 segundos = 36,9 m / s
Dado que,
Fuerza aplicada = 8N
Peso de la silla de paseo en gramos = 650g
a). To find the aceleración,
[tex]F = m[/tex] × [tex]a[/tex]
[tex]a = F/m[/tex]
[tex]= 8 N/0.650 kg[/tex]
[tex]= 12.3 m/s^2[/tex]
Now,
b). :-espacio recorrido en 5 segundos y
Using the Kinematic formula:
[tex]x = 1/2[/tex] × [tex]a[/tex] × [tex]t^2[/tex]
[tex]x = 1/2[/tex] × [tex]12.3 m/s^2[/tex] × [tex](5s)^2[/tex]
= 153.75 m
c). Using the same formula,
velocidad a los 3 segundos si parte
[tex]v = a[/tex] × [tex]t[/tex]
[tex]v = 12.3 m/s^2[/tex] × [tex]3 s[/tex]
= 36.9 m/s
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A circuit has an overall resistance of 40 ohms and a current of 200mA.
What is the potential difference in this circuit?
Answer:
Hey!
_________________
Voltage (V) = 0.8V
Current (I) = 200 mA = 200/10^3 = 2/10
Resistance = ?
Resistance = Voltage / Current
Voltage = Current × Resistance
0.8 = 2/10 × Resistance
0.8×10/2 = Resistance
8/2 = Resistance
Resistance = 4 ohm
_________________
Hope it helps...!!!
Explanation:
How can light be both a wave and a particle? What does that mean?
Answer:
Explanation:
Quantum mechanics tells us that light can behave simultaneously as a particle or a wave. However, there has never been an experiment able to capture both natures of light at the same time; the closest we have come is seeing either wave or particle, but always at different times.When UV light hits a metal surface, it causes an emission of electrons. Albert Einstein explained this "photoelectric" effect by proposing that light – thought to only be a wave – is also a stream of particles
Why is light considered a wave and a particle?
Light behaves mainly like a wave but it can also be considered to consist of tiny packages of energy called photons. Photons carry a fixed amount of energy but have no mass. They also found that increasing the intensity of light increased the number of electrons ejected, but not their speed
Which of the following statements best describes the method of energy conservation known as cogeneration?
Answer:
heat and power
Explanation:
is the simultaneous production of electricity and heat both of which are used
A 150kg motorcycle starts from rest and accelerates at a constant rate along with a distance of 350m. The applied force is 250N and the coefficient of kinetic friction is 0.03. What is the net force applied to the motorcycle?
Answer:
205N
Explanation:
The net force (F) is the difference between the applied force([tex]F_{A}[/tex]) and the kinetic frictional force([tex]F_{R}[/tex]). i.e
F = [tex]F_{A}[/tex] - [tex]F_{R}[/tex] -----------------(i)
Note that;
[tex]F_{R}[/tex] = μmg
Where;
μ = coefficient of kinetic friction
m = mass of the body
g = acceleration due to gravity = 10m/s²
Equation (i) then becomes;
F = [tex]F_{A}[/tex] - μmg -------------------(ii)
Given from question;
m = mass of motorcycle = 150kg
μ = 0.03
[tex]F_{A}[/tex] = 250N
Substitute these values into equation (ii) as follows;
F = 250 - (0.03 x 150 x 10)
F = 250 - (45)
F = 205N
Therefore, the net force applied to the motorcycle is 205N
If you have 5.6 grams of a radioactive isotope with a half-life of 150 years:
How much of the isotope will you have left after 750 years?
Answer:
0.175g
Explanation:
A = A02^-(t/hl)
= (5.6g)2^-(750/150)
= 0.175g
the light beam falls on the surface of the mirror at an angle of 50 ° and is reflected. What is the magnitude of the reflection angle of that fiber?
Answer:
The Magnitude of the angle of reflection equals that of Incidence from the Law of reflection
So its 50°.
Explanation:
A spring has 100 J of EPE when it is stretched 2 m. What is the spring constant?
A. 100 N/m
B. 50 N/m
C. 200 N/m
D. 150 N/m
Answer:
B: 50 N/m
Explanation:
Hopes it help.
The spring constant of the spring is 50 N/m. The correct option is B.
What is spring potential energy?When the spring is compressed, it gets compressed up to its elastic limit. When load is removed from the spring, it regains its shape and obtains equilibrium position. The energy stored in this process is called as spring potential energy.
Given a spring has 100 J of EPE when it is stretched 2 m. The energy stored in the spring is given by
SPE = ½ kx²
100 = ½ k (2 m)²
k = 50 N/m
So, spring constant of the spring is 50 N/m.
Thus, the correct option is B.
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please answer this dear friends please
Answer:
7. 5 pa
8. 5 pa
9. 5 pa
10. 75 pa
11. 25 N
Explanation:
7.
P = F/ A
= 15 / 3
= 5 pa
8.
P = F/ A
= 35 / 7
= 5 pa
9.
area of floor = l × b
= 1 × 4
= 4m^ 2
P = F / A
= 20 / 4
=5 pa
10.
area in m^2 = 400/100 = 4m^2
P = F/A
= 300 / 4
= 75 pa
11.
F = P×A
= 25×1
= 25 N
If an external force and the frictional force are acting on a body, which is in rest on the floor and are equal and opposite, then the frictional force is _____
If an external force and the frictional force are acting on a body, which is in rest on the floor and are equal and opposite, then the frictional force is Static friction.
What happens when you disconnect an electromagnet from battery?
A.it wil explode
B.it will continue to attract non-metals
C.it will stop from attracting metals
E.nothing will happen
Answer:
b.
If you disconnect the wire, the magnetic field disappears and the nail is no longer a magnet. ... The current flowing through the wire makes the wire hot and drains the battery quickly.
Explanation:
-183° degrees Celsius to kelvin
Answer:
90.15K
Explanation:
The formula is x°C + 273.15 = yK
Answer:
(-183°C) = 90.15K
Explanation:
-183°C is given
Now,
K = °C + 273
K = (-183) + 273.15
K = 90.15
Thus, (-183°C) = 90.15K
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Examine the following image. Which ocean-floor feature is indicated by the arrow in the image? (10 points)
Public Domain
Group of answer choices
Abyssal plain
Continental slope
Guyot
Seamount
Answer:
Continental slope
Answer: The answer is Seamount. A seamount is a submarine mountain located on oceanic crust near mid-ocean. The image shows a very long seamount in Massachusetts and that is formed by volcanic activity in New England Seamounts.
Calculate Kinetic Energy The potential energy of a swing is 200 J
at its highest point and 50 J at its lowest point. If mechanical
energy is conserved, what is the kinetic energy of the swing at its
lowest point?
Answer:
150J
Explanation:
Pi = Pf + Kf
200 = 50 + Kf
---> Kf = 150J
The kinetic energy of the swing at its lowest point is 150 J.
What is energy?Energy is the ability or capability to do tasks, such as the ability to move an item (of a certain mass) by exerting force. Energy can exist in many different forms, including electrical, mechanical, chemical, thermal, or nuclear, and it can change its form.
Given in the question the potential energy of a swing is 200 J at its highest point and 50 J at its lowest point
Pi = Pf + K E
200 = 50 + K E
K E = 150 J
The kinetic energy of the swing at its lowest point is 150 J.
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Most consumers first spend their disposable income on what
Answer:
They first spend it on necessities.
Imagine that a 1200 kg vehicle speeds up from rest to 20.0 m/s in 80 m.
How much work was done on the car? (Answer in 3 sig figs)
Correct question:
Imagine that a 1200 kg vehicle speeds up from rest to 20.0 m/s in 80 s.
How much work was done on the car? (Answer in 3 sig figs)
Answer:
the work done on the vehicle is 2.40 x 10⁵ J
Explanation:
Given;
mass of the vehicle, m = 1200 kg
initial velocity of the vehicle, u = 0
final velocity of the vehicle, v = 20 m/s
time of motion of the vehicle, t = 80 s
The distance moved by the vehicle is calculated as;
[tex]s = (\frac{v + u}{2} )t\\\\s = (\frac{20+ 0}{2} )(80)\\\\s = 800 \ m[/tex]
The force applied to the vehicle is calculated as;
[tex]F = ma = \frac{m v}{t} = \frac{1200 \times 20}{80} = 300 \ N\\\\[/tex]
The work done on the vehicle is calculated as;
W = F x d
W = 300 x 800
W = 2.4 x 10⁵ J.
Therefore, the work done on the vehicle is 2.40 x 10⁵ J
Marine science what is climate change?
Answer:
In marine ecosystems, climate change is associated with concurrent shifts in temperature, circulation, stratification, nutrient input, oxygen content, and ocean acidification. There are also strong linkages between climate and species distributions, phenology, and demography.
Explanation:
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name of impurities present in zinc plate used in simple cell.
Mercury is present in zinc plate which is used in simple cell
The ship was travelling 77 meters per second, 35 degrees above the x-axis Northeast. Determine the magnitude and direction of the horizontal vector component, Vx
Answer:
vₓ = 63.07 m/s
Explanation:
The horizontal vector component of the velocity can be found by the following formula:
[tex]v_x = vCos\theta[/tex]
where,
vₓ = horizontal vector component of velocity = ?
v = magnitude of velocity = 77 m/s
θ = angle with x-axis = 35°
Therefore,
[tex]v_x = (77\ m/s)Cos\ 35^o[/tex]
vₓ = 63.07 m/s
As the amount of charge on two objects increases, the strength of the electrical force between the objects increases. decreases. varies. remains the same.For which pair of objects would adding the same amount of electrons to each object result in a decrease in the electric force? two positively charged objects two negatively charged objects two objects that have no charge two objects that have opposite charges
Answer:
a. Increases
b. Two objects that have opposite charges
Explanation:
a. As the amount of charge on two objects increases, the strength of the electrical force between the objects increases. decreases. varies. remains the same.
According to Coulomb's law, the electrical force, F between two charges q and Q is directly proportional to the product of the charges.
So, F ∝ qQ
So, if q and Q increase, their product increases and thus, the strength of the electrical force between them increases.
So, if the amount of charge of two objects increases, the strength of the electrical force between the objects increases.
b. For which pair of objects would adding the same amount of electrons to each object result in a decrease in the electric force? two positively charged objects two negatively charged objects two objects that have no charge two objects that have opposite charges
Since according to Coulomb's law, the electrical force, F between two charges q and Q is directly proportional to the product of the charges.
So, F ∝ qQ
If the same amount of electrons are added to both charges and the charges are opposite in sign, the magnitude of one charge increases while that of the other charge decreases. so the product qQ decreases and thus F decreases.
So, the electric force decreases when the same amount of electrons is added to two objects that have opposite charges.
Answer:
A increases
Explanation:
Electromagnetic waves are made by vibrating electric charges and can travel through what
Answer:
vibrates, and they carry energy from one place to another. Look at the sound wave and the water wave. vibrating electric charges and can travel through space where matter is not present. to particle, electromagnetic waves travel by transferring energy between vibrating electric and magnetic fields.
What is the difference in length between the longest ski trail and the shortest ski trail?
Answer:
Please provide more information!
Explanation:
Answer:
1.75
Explanation:
What is a Weather Front. in your own words but be more detailed about what you say.
Explanation:
A weather front is a boundary separating air masses of several characteristics eg. Air density, wind and humidity. Disturbed weather often arises from these differences
what is a material used to reduce or prevent the transfer of electricity, heat, or sound ?
Answer:
The material you're looking for is insulation.
Explanation:
It reduces and/or stops electricity waves, heat waves, and sound waves from going past.
A change in state is considered a
A.
Chemical change
B.
Physical Change
C.
Element
D.
Density
[tex]\huge{ \mathfrak{ \underline{Áñswér: }}}[/tex]
A change in state is considered a :
[tex] \hookrightarrow { \mathbb{\: physical \: change}}[/tex]
[tex]\#TeeNForeveR [/tex]
Any help would be great! Thank you x
Giving brainliest answer xoxo
Answer:
A vacuum would have been created. I hope this helps have a great day
State one similarity between rotatory and circular motion
Answer:
The main difference between these types of motion is that circular motion is a special case of rotational motion, where the distance between the body’s centre of mass and the axis of rotation remains fixed.
Rotational motion is based around the idea of rotation of a body about its center of mass. In rotational motion, the axis of rotation and centre of mass could change whereas in circular motion, the axis of rotation and centre of mass does not change.
Circular motion is a movement of an object along the circumference of a circle or rotation along a circular path and can either have a constant angular rotation rate and constant speed, or it can exist with a changing rate of rotation.
Think of one of those fairground rides where people sit on dummy horses. Now imagine the horses spin around the post that holds them to the base of the ride. Then you have both rotational motion of the horse and circular motion as the horses move around the ride.