Answer:
Explanation:
charcoal is a floater therefore doesnt get fully immersed in water
19. A car accelerates uniformly in a straight line from 10 m/s to 20 m/s in 5 seconds. What is the
acceleration?
Answer:
2 [tex]m/s^{2}[/tex]
Explanation:
Acceleration = [tex]\frac{Final velocity-Initial velocity}{Time}[/tex]
= [tex]\frac{20 - 10}{5}[/tex]
= [tex]\frac{10}{5}[/tex]
= 2 [tex]m/s^{2}[/tex]
Please I need an answer
Answer:
D
Explanation:
The ballon will repel
what force is required to accelerate to 10 kg object to 5.9 m/s/s?
Force required to accelerate 10 kg object to 5.9 m/s/s ?
Mass = 10 kg
Acceleration = 5.9 m/s^2
Force = Mass * Acceleration
Force = 10 kg * 5.9 m/s^2
Force = 59 kg m /s^2 = 59 N
Two students move a box to the left. One student pushes with a force of 100 N to the left, and the other student pulls with a force of 85 N to the left. They move the box 20 m in 7 s. What is the total amount of work done on the box by the students?
Answer:
Resultant Force= F1 - F2
F1= 100N
F2= 85N
Resultant Force= 100N - 85N
R.F = 15N
Workdone= Force x Displacement
Force = 15N
Displacement = 20m
= 15N X 20m
=300Nm or Joules
What happens to molecules when their kinetic energy decreases? * 6 points They move slower they move faster they get heavier It depends on the type of molecule
When ANYTHING moves slower, its kinetic energy decreases.
What are the coefficients need to balance the following equation: H2+O2=H2
Answer:
we can't balance this because there are no atoms of oxygen in the product side
Ana walks from 4 m to 200 cm. Which of the following statements is true about
her motion? Explain
distance = 2 hm
distance = 20 cm
distance = 2 cm
distance = 2.0 m
Un asensor de masa 500 kg , con cuatro personas a bordo , cada una con una masa de 75 kg , asciende con una altura de 28 metros Calcula la energia potencial que adquiere el asensor
Answer:
U = 2,195 10⁵ J
Explanation:
The potential energy is
U = m g and
in this case each person has a mass of 75 kg and the elevator has a mass of 500 kg, the total mass is
m_total = m_elevator + 4 m_person
m_total = 500 + 4 75
m_toal = 800 kg
let's calculate
U = 800 9.8 28
U = 2,195 10⁵ J
at what distance from a 2.45*10^-6 C charge will the electric field be 100 N/C?
Answer:14.8
Explanation:
Trust me
The distance will be = 14.85 m
What is electric field ?A region around a charged particle or object within which a force would be exerted on other charged particles or objects.
given :
Charge (q)= 2.45*[tex]10^{-6}[/tex] C
Electric field (EF) = 100 N/C
to find = ? distance (r)
Electric field = 1/4π∈o * (q/[tex]r^{2}[/tex])
100 = 9 * [tex]10^{9}[/tex] * ( 2.45*[tex]10^{-6}[/tex] / [tex]r^{2}[/tex])
[tex]r^{2}[/tex] = 220.5
r= [tex]\sqrt{220.5}[/tex]
r = 14.85 m
The distance will be = 14.85 m
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A room that is kept at the same temperature year-round feels warm to someone who comes in from outside during the winter and cool to someone who comes in from outside during the summer. Explain how this can be true.
Answer:
its warmer than outside in winter and its colder than outside in summer
Explanation:
The perception of warmth or coolness is relative to the temperature difference between the body and the environment. Even though the temperature inside the room remains constant year-round, the relative temperature difference between the environment outside and the room can cause a subjective sensation of warmth or coolness.
What is temperature?Temperature is a physical quantity that measures the degree of hotness or coldness of a body or a substance. It is a scalar quantity, which means it has only a magnitude and no direction.
The SI unit of temperature is the Kelvin (K), but the temperature is commonly measured in degrees Celsius (°C) or degrees Fahrenheit (°F) as well.
The temperature difference is the numerical value of the difference between the temperatures of two objects or substances. It represents the amount of heat that flows from one object to another due to the temperature gradient between them. The temperature difference is also a scalar quantity, and its unit is usually expressed in degrees Celsius or Kelvin.
The temperature difference is important in many areas of science and engineering, including thermodynamics, heat transfer, and meteorology. It is also used to measure the efficiency of heating and cooling systems, such as air conditioners and refrigerators.
Here in this question,
This phenomenon occurs due to the relative difference in temperature between the environment outside and the temperature inside the room. The feeling of warmth or coolness is a subjective sensation that depends not only on the actual temperature but also on the difference in temperature between the person's body and their surroundings.
During the winter, the temperature outside is generally colder than the temperature inside the room which is kept at a constant temperature. When a person comes into the room from the cold outside, their body temperature is lower than the room temperature, so they feel warmer inside the room. This is because the heat from the warm room transfers to the person's body, raising their body temperature and making them feel warmer.
On the other hand, during the summer, the temperature outside is usually warmer than the temperature inside the room. When a person comes into the room from the hot outside, their body temperature is higher than the room temperature, so they feel cooler inside the room. This is because the heat from the person's body transfers to the cooler room, lowering their body temperature and making them feel cooler.
Therefore, the relative temperature difference between the environment outside and the room can cause a subjective sensation of warmth or coolness.
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2. You are stirring some soup on the stove and you notice that the metal spoon is getting hot.
What type of heat transfer?
what type of galaxy tends to be the oldest? Explain.
Answer:
Elliptical galaxies, such as M87, are the oldest and roundest galaxies in the universe. Astronomers think these galaxies are formed in major mergers—dramatic collisions between galaxies that result in one massive galaxy being entirely consumed by another.
Explanation:
hope this helps...
have a good day...
Kelly sits on a rock in a field. Which of the following examples correctly name force pairs? Select all that apply.
А
Kelly pushes on the rock, and the rock pushes on Earth.
B
Earth pulls on Kelly, and Kelly pulls on Earth.
с
The rock pushes on Earth, and Earth pulls on the rock
D
Kelly pushes on the rock, and the rock pushes on Kelly.
Answer:
A
Explanation:
A marble is thrown horizontally with a speed of 15.0 m/s from the top of a building. When it strikes the ground, the marble has a velocity that makes an angle of 65.0° with the horizontal. From what height above the ground the marble was thrown. How far from the base of the building, did the marble land?
explain how height,acceleration,and speed would affect the movement of a roller coaster
help me with this question plz
Answer:
Greatest position of the ball are z
A toy cart with a weight of 10N moves with a constant velocity of 2 m/s to the right on a horizontal table. According to Newton's Laws of Motion, which of the following statements is correct?
a
The table exerts a force of 10N upward on the toy cart.
b
The toy cart exerts a force of 10N upward on the toy table.
c
The toy cart exerts a force of 2N downward on the table.
d
The toy cart exerts a force of 2N to the right on the table.
Answer:
Its A ik cuz i just studied it when i was answering this question...
Explanation:
have a good day!
4. Find the density of 2750 g of a substance that occupies 250 mL.
i need help with 1-10
Answer:
1) C. Energy
2) A. Joule
3) D. Joule
4) B. Potential
5) A. Greater
6) C. Largest
7) A. Speed and mass
8) A. Kinetic
9) A. Kinetic
10) D. Height and mass
What caused the light to shine on the paper above the mirror?
O The light was refracted.
The light was reflected.
The light was amplified.
The light was diffracted.
Answer:
The Light was reflected, b.
Explanation:
If the flashlight was pointed at the mirror, it was reflected because it did not stop on the mirror or go through the mirror or reflect in different ways.
What is the speed of light in a medium if the index of refraction is 1.57?
Answer:
1.91 × 10⁸ m/s
Explanation:
[tex]n = \frac{c}{v} \\ 1.57 = \frac{3.0 \times {10}^{8} }{v} \\ v = 1.91 \times {10}^{8} \: ms {}^{ - 1} [/tex]
The speed of light in a medium if the index of refraction is 1.57 is 1.91 * 10⁸ m/s
The refractive index of a material is the ratio of speed of light in air to speed of light in the medium. It is given by:
Refractive index(n) = speed of light in air(c) / speed of light in material(v)
Given that n = 1.57, c = 3 * 10⁸ m/s, hence:
n = c/v
1.57 = 3 * 10⁸ / v
v = 1.91 * 10⁸ m/s
The speed of light in a medium if the index of refraction is 1.57 is 1.91 * 10⁸ m/s
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CAN YOU EXPLAIN?
How are waves different, and how do their differences
affect their characteristics?
HELPWhat is the intensity of an electric field at a point where a 0.50 C
charge experiences a force of 20. N?
Remember to identity all of your data, write the equation, and show
your work. (5 points)
Answer:intensity of an electric field (E)
charge (q)
Force (F)
E=F/q
E=20N/.5C
E=40N/C
Explanation:
The Electric field intensity will be 40 N/C
What is an Electric field intensity ?The electric field intensity at a point is the force experienced by a unit positive charge placed at that point.
Electric field intensity(E) = force (F)/ charge(q)
given
charge = 0.50 C
Force = 20 N
Electric field intensity = ?
E = 20 N / 0.50 C
E = 40 N/C
The Electric field intensity will be 40 N/C
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Punnett squares are used by geneticists to determine the probability of
different offspring genotypes.
Answer:
are used by geneticists to determine the probability of different offspring genotypes.
3-the-lamps are connected in series. The first-lamp-has-a-current-of2-A and
a resistance of 4 Ohms. The second-lamp has a voltage of 10V. The third-lamp has a
voltage of 6V. Find in this diagram the total voltage, the current for all the lamps, the
total-resistance.
2. An object's weight is proportional to its _ or _ from another object
Answer:
mass
gravitational pull
What causes the apparent colors of the objects we see?
Answer: The human eye and brain transform light into color. Allowing us to see them.
Explanation: Light receptors within the eye turn light into color. The color that is reflected off of an object, is what we see. Hope this helps.
The apparent colors of the objects we see causes due to reflection of the light which they absorb and emit.
What is reflection?Reflection is the change in direction of a wavefront which occurs at an interface present between the two different media so that the wavefront of the wave returns into the medium from which it has been originated. Common examples of reflection include the reflection of light, sound wave and water waves.
The color of an object is the wavelengths of light waves that it reflects. The reflection is determined by the arrangement of electrons in the atoms of that substance which will absorb and re-emit photons of particular energy levels according to the quantum laws.
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Define discrimination and write a sentence using the word.
Define discrimination and write a sentence using the word.
Answer:
discrimination: prejudice towards a person/group based on their race, sex, age, and/or sexual orientation
Explanation:
People of color face discrimination because of the color of their skin.
Answer:
Discrimination is treatment or consideration of, or making a distinction of or against a person or thing based on the group, class or category to which that person is perceived to belong or rather.
A sound wave passes from air into water and then into steel. With each change in medium, what happens to the speed of the
wave?
А
It increases
B
It decreases. C
It increases then decreases
D
It decreases then increases
Answer:
A
Explanation:
if its wronge im so sorry
6. Do you think that aliens exist?