Answer: Hot
Explanation: Scientist use the color of starts to determine how hot the surface temperature is.
This project will allow you to “see” the difference between AC and DC.
You will need the following:
• Metal plate or pan
• Paper clip
• Piece of cloth
• Cornstarch
• Potassium iodide (available at a pharmacy)
• 9 volt battery
• 3 insulated wires with the insulation stripped off the ends
• Low voltage bell transformer (available at electronics or hardware stores)
Follow these steps:
1. Soak the piece of cloth well in a thick solution of cornstarch and water mixed with the
potassium iodide.
2. Lay the metal plate or pan with the bottom up. Wring the cloth out and lay it across the
metal plate or pan.
3. Use a wire to connect the negative terminal to one edge of the pan, using an alligator clip
or paper clip.
4. Connect the other wire to the positive end, and then slowly stroke the exposed end across
the cloth. (The electric current frees the iodine from the potassium iodide, making a dark
blue mark.) What pattern do you see? What kind of current are you using? Write your
answers.
Answer: uhhhhhhh what is this for?
Explanation i so confused
formula of average speed
Answer:
Hey mate....
Explanation:
This is ur answer.....
Hope it helps!
Mark me brainliest....
FOLLOW ME!!! :)
the mass of the earth is 6 × 10²² kg and that of the moon is 7.4× 10²² Kg if the distance between the earth and moon is 3.84 × 10⁵ km . calculate the force of the earth exerted by it on the moon . Take G = 6.67×10¹¹ Nm² / kg²
Answer:
Force = 20.08 x 10⁴⁷ N
Explanation:
Given:
M1 = 6 × 10²⁴ kg (rectified)
M2 = 7.4× 10²² Kg
Radius r = 3.84 × 10⁵ km
G = 6.67×10¹¹ Nm² / kg²
Find:
Force
Computation:
F = GM1M2 / r²
Force = [(6 × 10²⁴)(7.4× 10²²)(6.67×10¹¹ )] / (3.84 × 10⁵)²
Force = [296.148 × 10⁵⁷] / [14.7456 × 10¹⁰]
Force = 20.08 x 10⁴⁷ N
Approximately what % of the moons surface is illuminatednon a new-moon day?
Answer: 0%
Explanation: hope this help
what is the mass of modelling clay?
the mass of modelling clay is 500g
Is 35 miles per hour a vector or a scalar?
1. vector
2. scalar
Answer:
scalar
is the correct answers
Answer:
Scalar
Explanation:
Mph, cubic feet,pounds, and hours are scalar terms
how to prevent air resistance or what reduces air resistance?
Answer:
reducing the area in contact with air and being more streamlined
Explanation:
The amount of air resistance an object experiences depends on its speed, its cross-sectional area, its shape and the density of the air
An organism with the alleles Aa is called __________, while one with AA or aa is called __________.
A. heterozygous, hom/ zygous
B. heterozygous, homo/zygous
Answer:
Hetefrozygous, homofzygous
If a sample of an unknown material with a mass of 0.68 g and a volume of 0.8 cm3 is dropped
into maple syrup, will it sink or float? maple syrup has a density of 1.33 g/cm3
A healthy breakfast should include foods from the Grains group, the Vegetables OR Fruits group, and the Dairy OR the Protein group. * O True O False
Answer:
vry true
Explanation:
yes because ll thoes give you protien sorry for my bad spelling
Answer:
True
I Had this before
An alpha particle (the nucleus of a helium
atom), carrying a charge of 3.2 x 10-19 C
moves at 4.1 x 107 m/s at a right angle to a
magnetic field.
If the particle experiences a force of
2.3 x 10-14 N due to the magnetic field, what
is the magnitude of the magnetic field?
Answer in units of T.
Answer:
QuestionExplanation:
A toy car, as shown below, is moving forward with a force of six Newton's. If the wind blows from behind with a force of two Newton's, what will happen to its speed and position
Answer:
its speed will increase to 8 newtons allowing its position to dramatically change.
What is the wavelength of an earthquake wave if it has a speed of 10 km/s 3 points
and a frequency of 15 Hz?*
.67 km
1.5 km
150 k
Answer:
0.67 km
Explanation:
Given that,
The speed of a wave, v = 10 km/s = 10000 m/s
The frequency of a wave, f = 15 Hz
We need to find the wavelength of the wave. The speed of wave in terms of wavelength and frequency is given by :
[tex]v=f\lambda\\\\\lambda=\dfrac{v}{f}\\\\\lambda=\dfrac{10000}{15}\\\\=666.66\ m[/tex]
or
= 0.67 km
So, the wavelength of the wave is 0.67 km.
Which possesses the most gravitational potential energy?
A. a 4 kg object 0.25 m above the ground.
B. a 100 g object 20 m above the ground.
C. a 2kg object 0.75 m above the ground.
D. a 50 g object 30 m above the ground.
Answer:
uxjdkddoedlkfkkllllllllo
Why do you think the speed of sound is higher
in solids, than liquids and gases?
Answer:
Explanation:
Particles of a solid are closely packed, and when a solid is hit to produce a sound the kinetic energy present in the solid will cause the particles to vibrate vigorously in the intermolecular spaces in the solid, whereas the paticles of liquids and gases are rather further apart therefore having large intermolecular spaces between particles.
What is the difference between a bar magnet and an electromagnet? (check all that are
true)
A . A bar magnet is a permanent magnet that will keep its magnetism for a long time
B . An electromagnet is always stronger than a bar magnet.
C . A bar magnet will only stay a magnet if it is in contact with something metal.
D . An electromagnet is a temporary magnet that is only magnetic when electricity is flowing through the wire.
Answer:
D and A
Explanation:
Hint The basic difference between them is that a bar magnet is a permanent magnet whereas an electromagnet is a temporary magnet. An electromagnet is formed when an electric current is passed through wires wound around soft metalcore. An electromagnet loses its magnetism once the current flow is stopped.
Una bola se lanza verticlamente de la parte superior de un edificio con una velocidad inicial 25 m/s la bola impacta al suelo en la base del edificio 7 segundos despues de ser lanzada ¿que altura subio la bola
Answer:
S = 415.1 meters
Explanation:
Dados los siguientes datos;
Velocidad inicial = 25 m/s
Tiempo, t = 7 segundos
Para encontrar la altura (desplazamiento) de la pelota, usaríamos la segunda ecuación de movimiento;
[tex] S = ut + \frac {1}{2}at^{2}[/tex]
Dónde;
S representa el desplazamiento o altura medida en metros.
u representa la velocidad inicial medida en metros por segundo.
t representa el tiempo medido en segundos.
a representa la aceleración medida en metros por segundo cuadrado.
Sustituyendo en la ecuación, tenemos;
[tex] S = 25*7 + \frac {1}{2}*(9.8)*7^{2}[/tex]
[tex] S = 175 + 4.9*49 [/tex]
[tex] S = 175 + 240.1 [/tex]
S = 415.1 meters
what is a benefit of fossil fuel consumption?
Answer:
increased greenhouse gases
Explanation:
I think this is the right answer...
Pedro picked up and held a cube of ice in his hand and noticed that he no longer felt a difference in temperature after the ice cube melted in his hand. Which of the following statement best explains what happened?
1.Heat was transferred from Pedro’s hand to the ice increasing the temperature of the ice.
2.Heat was released from the ice cube into the air increasing the temperature of the ice.
3.Cold was transferred to Pedro’s hand from the ice increasing the temperature of the ice.
4.Heat was released from Pedro’s hand into the air melting the ice increasing the temperature of the ice.
Answer:
the answers is 1.
Explanation:
this is because heat always travel's from the warmest object to the coldest. His hands thermal energy is transferred to the ice making the ice round to the same temperature of his hand. This can also be an example of equalibrum.
As a object falls from a high-flying stationary helicopter, its velocity increases and its acceleration ____.
increases.
decreases.
stays at 10 m/s2.
is zero the entire time.
2.Write the formula associating energy with power
3.Write the formula associating potential energy with height.
4. By substitution of the formula on question 3 for the formula in question 2, rewrite the formula for power.
(PLEASE PLEASE HELP ASAP ILL MARK BRAINLIEST)
Answer:
[tex] Power = \frac {mgh}{time} [/tex]
Explanation:
2. Power can be defined as the energy required to do work per unit time.
Mathematically, it is given by the formula;
[tex] Power = \frac {Energy}{time} [/tex]
3. Potential energy can be defined as an energy possessed by an object or body due to its position.
Mathematically, potential energy is given by the formula;
[tex] P.E = mgh[/tex]
Where,
P.E represents potential energy measured in Joules.
m represents the mass of an object.
g represents acceleration due to gravity measured in meters per seconds square.
h represents the height measured in meters.
4. Substituting the equation in 3 into equation in 2 above, we have;
[tex] Power = \frac {mgh}{time} [/tex]
Miles Tugo is camping in Glacier Canyon and he makes a loud holler. The sound bounces off the nearest canyon wall (which is located 170 meters away from Miles) and returns to Miles.
Determine the time elapsed between when Miles makes the holler and the echo is heard.
Answer:
It would take 1 s to hear the echo.
Explanation:
Here, the sound covered a total of 340 meters, since it bounces off the canyon wall and travels back to Miles in the form of echo.
The time elapsed can be determined by,
v = [tex]\frac{2D}{t}[/tex]
⇒ t = [tex]\frac{2D}{v}[/tex]
where: v is the speed of sound in air (343 m/s), D is the distance of the nearest canyon (170 m).
So that,
2D = 2 x 170 = 340 m
Thus,
t = [tex]\frac{340}{343}[/tex]
= 0.9913 s
t = 1 s
It takes 1s for Miles to hear his echo.
Copper and hydrogen con euch be formed by electrolysis,
At which electrodes are these stoments formed?
copper
hydrogen
A
anode
anode
B
anode
cathode
cathode
anode
D
cathode
cathode
ОА, А
Answer:
C.cathode, cathode
Explanation:
In electrolysis, a device called ELECTRODE, which electric current passes through is used. However, electrodes can either be anode or cathode depending on the charge. Anode is a positive electrode that attracts negative ions while cathode is a negative electrode that attracts positive ions.
According to this question, Copper (Cu) and hydrogen (H) which are both positive ions i.e. Cu2+ and H+ will move towards and form at the CATHODE. Hence, the answer is cathode, cathode for the respective element.
If you walk at an average speed of 5 km/h for 30 minutes,
how far will you walk?
Answer:
150
Explanation:
30 times 5 = 150 i think
Could someone please help me..?
Electrons:
A. are found in the nucleus and are "locked" in.
B. are found on energy levels and are "locked" in.
C. are found in the nucleus and are able to travel.
D. are found on energy levels and are able to travel.
A tractor pulls a 978 kg wagon at a velocity of 4.9 m/s. How many watts of power are exerted by the tractor motor is the tractor pulls the wagon at a 60 degree angle?
Answer:
23481.78 W
Explanation:
The computation of number of watts of power is shown below:
M = 978 kg
V = 4.9 m/s
Theeta = 60°
As we know that
P = Fcos(theeta).V
F = Mg
P = (Mg)cos(theeta).V
P = 978×9.8×cos(60)×4.9
P = 23481.78 W
A compact car, mass 664 kg, is moving at 19 km/h toward the east. What is the car's momentum in kg x m/s?
Answer:
3504.4 kgm/s
Explanation:
First, convert km/hr to m/s:
19 km/hr x 1000m/1km x 1/60min x 1/60s = 5.28 m/s
p = mv
p = (664 kg)(5.28 m/s) = 3504.4 kgm/s
If a car is traveling 35 m/s for 200 seconds, how far will the car travel?
Which of the following are vector quantities? Check all that apply.
A. Distance
B. Acceleration
C. Time
D. Velocity
Pls someone help me!!!!!
Answer:
Seeing as how the balloon is mainly negatively charged and the paper being positively charged, the answer would be B: The tissue paper will stick to the balloon because the tissue paper is positively charged!
