Answer:
In order from highest to lowest energy, the sections of the EM spectrum are named: gamma rays, X-rays, ultraviolet radiation, visible light, infrared radiation, and radio waves.
A 20 N force acts for 10 s on a skateboard. What is the impulse imparted to the skateboard? What is the skateboard’s change in momentum?
Answer:
impulse = force * time = 20 * 10 = 200 Ns
change in momentum = impulse = 200 kgm/s
A compass can be used to determine the presence of charge flow in a circuit.
-true
-false. only the bulbs can tell you if there is charge flow.
Answer:
False
Explanation:
A compass can be used to determine relative direction but not absolute direction.
How long will it take for a 1.5A current to coat evenly a layer of copper 0.1mm thick on both sides of a 12cm x 12cm copper plate [e.C.E of copper= 0.00033g/C , density of copper 9g/cm
Answer:
Explanation:
First of all we shall calculate mass of copper to be calculated from the formula below.
mass = volume x density
volume = total surface area x thickness of layer
= 12 x 12 x 2 x .01 cm³
= 2.88 cm³
mass = 2.88 x 9 = 25.92 g .
Let time required be t s . .
charge flowing in time t = 1.5 t coulomb.
Given ,
1 coulomb deposits .00033 g of copper
1.5 t deposits .00033 x 1.5 t g of copper
So ,
.00033 x 1.5 t = 25.92
t = 52364 s
= 14.54 hours.
A ball is dropped over the edge of a building. How fast is the ball moving 2.0 seconds
after being dropped?
Answer:-20.m/s,drum
Explanation:
Which of the following is not a benefit of improved cardio-respiratory fitness?
A. Resting blood pressure goes up
B. The heart becomes more efficient
C. Less risk of an early death
D. Calories are burned and body fat decreases
25 points please help
In the chemical reaction CH4 + 2O2 → CO2 + 2H2O, there are reactants on the left of the equation and products on the right. If you count the atoms in the reactants, there are
a. 4 carbon atoms, 4 hydrogen atoms, and 2 oxygen atoms
b. 1 carbon atom, 4 hydrogen atoms, and 2 oxygen atoms
c. 1 carbon atom, 4 hydrogen atoms, and 4 oxygen atoms
d. 4 carbon atoms, 4 hydrogen atoms, and 4 oxygen atoms
Answer:
the answer is A. 4 carbon atoms, 4 hydrogen atoms, and 2 oxygen atoms
The number of atoms of each molecule of the reactants is required.
The correct option is c. 1 carbon atom, 4 hydrogen atoms, and 4 oxygen atoms
The given reaction is
[tex]CH_4+2O_2\rightarrow CO_2+2H_2O[/tex]
For carbon atoms
The only carbon atom is present in [tex]CH_4[/tex]
So, 1 carbon atom
The hydrogen atoms are also present is [tex]CH_4[/tex]
There are 4 hydrogen atoms.
The oxygen atoms present is [tex]2\times 2=4[/tex]
So, the number of atoms present in the reactants are c. 1 carbon atom, 4 hydrogen atoms, and 4 oxygen atoms
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04 What is the pressure 40m under the sea if sea water has a density of 1100kg/m3? (atmospheric pressure is 101kPa)
the answer is 104 atm I hope this helps!
Which has more heat, a home oven at 500 degrees Celsius, or a one ton commercial oven at 500 degrees celsius?
Light refracts when:
A. It changes speed
B. It changes from a particle to a wave
C. Its density changes
D. It encounters a solid object
Answer:
the answer of the question is B
Answer: B
Explanation:
Which tennis tournament is considered the Grand Daddy of them all?
Answer:
Wimbledon
Explanation:
Una caja pesa 800N descansa sobre el piso de un elevador, en determinado instante el elevador tiene una velocidad hacia abajo de 5.0 m/s y una aceleracion hacia arriba de 2.5 m/s2 ¿en ese instante cual es la fuerza aue ejerce el piso del elevador hacia abajo?
Answer:
La fuerza ejercida sobre el piso del elevador hacia abajo es aproximadamente 1,004.075 N
Explanation:
Fuerza = Masa × Aceleración
El peso de la caja = 800 N
La velocidad hacia abajo = 5.0 m / s
Tomando la aceleración debida a la gravedad, g = 9,8 m / s²
La masa del cuerpo, m = 800 N / g = 800 N / (9,8 m / s²) ≈ 81,63 kg
La fuerza ejercida sobre el piso del ascensor durante la aceleración hacia arriba, 'N', se da como sigue;
N = m · g + m · a
a = 2,5 m / s²
∴ N = 81,63 kg × 9,8 m / s² + 81,63 × 2,5 m / s² = 800 N + 81,63 × 2,5 m / s² ≈ 1,004,075 N
La fuerza ejercida sobre el piso del ascensor hacia abajo ≈ 1,004.075 N
What is the reason so many poisonings go undetected at first?
4
Select the correct answer.
What does the number, or density, of field lines on a source charge indicate?
OA
direction of charge on the source charge
B.
amount of charge on the test charge
Oc.
amount of charge on the source charge
OD
direction of charge on the test charge
Reset
Next
Answer:
C. amount of charge on the source charge.
Explanation:
Electric field lines can be defined as a graphical representation of the vector field or electric field.
Basically, it was first introduced by Michael Faraday and it is typically a curve drawn to the tangent of a point is in the direction of the net field acting on each point.
The number, or density, of field lines on a source charge indicate the amount of charge on the source charge. Therefore, the density of field lines on a source charge is directly proportional to quantity of charge on the source.
A 70.0kg person walks from the ground to the roof of a 25.3 m tall building. How much gravitional Potential Energy does she have at the top of the building.
A-17,394.4
B/18,865.8 J
C-17,355.8 J
D-12,873.2 J
Answer:
i would say C
Explanation:
if im right can i get the crown?
indicate the type of wave motion of a flag waving in a breeze
Answer:
Transverse waves, because the motion of the wave is perpendicular to the direction of propagation. An S-wave is an example of a transverse wave.
Explanation:
A car is traveling on the highway at 28 m/s The driver sees a tree in the middle of the road and slams on the brakes. The car comes to a complete stop over a distance of 35 meters. What was the acceleration of the car as it was coming to a stop?
Answer:what are the answer options?
Explanation
A plane travels 2400 km in 3 hours. Calculate its average speed
Explanation:
Speed =distance travelled/time taken
URGENT
Which phrase describes a current
A)todays newspaper
B)Still bathtub water
C)the latest fashion
D)water flowing in a continuous path
Answer:
D. water flowing in a continuous path
Explanation:
The definition of a current is shown; water flowing in a continuous path.
This dude was sitting in the chair. Someone pulls the chair out from under him. He does not move in the direction of the chair. He simply falls to the ground in the same spot he was sitting. This shows inertia because:
Answer:
This shows inertia because inertia is an object's resistance to change in motion. When the person (imma call them a she) who pulled the chair from under the guy did that, the chair was the one affected by the force of the girl, not the guy. The guy continued heading in the direction he was originally going, which was down.
At least, that's about how I would answer this question.
Asubstance is cut into several piece and computered to the density of the original sample the density of each piece will be
3. What is the role of neutrons in the nucleus?
Answer:
The main role of neutrons is to reduce electrostatic repulsion inside the nucleus.
Explanation:
:) Good luck my friend
Lightning flashes and you hear a thunder clap for seconds later. the velocity of sound is 340 m/s. how far away did lightning strike ?
Answer:
For metric-system conversions, follow this method: Sound travels at about 340 m/s, so multiply the number of seconds you counted by 340, and you'll know how many meters away lightning struck. A three-second count, then, would place the lightning strike about 1,020 m away, or roughly 1 km.
Explanation:
hope it hep and if it doesnt sorry
The distance struck by the lighting flashes is 680 m.
The given parameters;
time taken to hear the thunder clap, t = 4 svelocity of sound, v = 340 m/sThe distance struck by the lighting is calculated by applying the principle of echo as follows;
[tex]v = \frac{2d}{t} \\\\2d = vt\\\\d = \frac{vt}{2} \\\\d = \frac{340 \times 4}{2} \\\\d = 680 \ m[/tex]
Thus, the distance struck by the lighting flashes is 680 m.
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A 5 kg rock and a 10 kg rock are dropped from a height of 10 m. Which of the following statements describes what happens to the potential energy of the rocks?
Answer:
statement not given greater mass has greater potential energy at same height
Visible light waves do not diffract as well as radio waves because?
Answer:
because the wavelength of the light waves are too small
Explanation:
What are the layers of the Sun, starting from the center and moving outward?
Answer:
There are three main parts to the Sun's interior: the core, the radiative zone, and the convective zone. The core is at the center. It the hottest region, where the nuclear fusion reactions that power the Sun occur. Moving outward, next comes the radiative (or radiation) zone.
Answer:
B.core, radiative zone, convective zone, and photosphere
Explanation:
Edge 2021
The position of galaxies in the universe was once hypothesized to be
constant, but evidence gathered by Edwin Hubble indicated that many
galaxies are actually racing away from Earth at high speeds. Which
statement is best supported by this discovery?
A. Science is a body of knowledge that is a subject to change based on data.
B. A hypothesis can become a law.
C. Science is a body of knowledge based on the work of well-known scientists.
D. A hypothesis is the correct answer to a problem.
The position of galaxies in the universe was once hypothesized to be
constant, but evidence gathered by Edwin Hubble indicated that many
galaxies are actually racing away from Earth at high speeds. the
statement that is best supported by this discovery is Science is a body of knowledge that is subject to change based on data, therefore the correct answer is option A
What is the scientific claim?Scientific claims are statements made in science based on an experiment.
These Scientific claims are backed by the experimental data and their true results obtained from scientific investigation and experimentation.
The position of galaxies in the universe was once thought to be fixed, but Edwin Hubble's observations revealed that many galaxies are actually moving away from Earth quickly. The conclusion that this discovery best supports is that science is a body of knowledge that is subject to change based on data, so option A is the appropriate answer.
Learn more about the scientific claims, here
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On his biking exercise, Albert rides 15 Km south. He sees a dead end so
he turns back and heads 4 Km north. He then continues for 1 km north
until he stops for a break. What distance did he cover? *
Answer:
m
Explanation:m
true or false, russian twists focus to strengthen the latissimus dorsi
Nearly all volcano and earthquakes activity happen where
Write the cautions which are taken to keep the magnetic properties of magnetsa) Don’t hammer it b) don’t drop it c) don’t heat it d) all of these
PLS HELP GUYS ITS URGENTTT!! I AM IN CLASS ...PLEASE!!
Answer:
D
Explanation:
These all can impact the magnetic properties