Answer:
The density of a material affects the speed that a wave will be transmitted through it. In general, the denser the transparent material, the more slowly light travels through it.
What is the missing force?
Answer: -110N
Explanation:
Assign a variable x to the unknown force. The net force was given as +25N, which means the sum of the two forces must equal +25N.
Subtract 135N on both sides
135 + x = 25
x = -110N
The negative sign indicates direction because force is a vector.
The law of conservation of energy describes how the amount of energy can change in a closed system. Which of these statements correctly describes this law? A The amount of energy created when an object move is equal to the energy destroyed when it stops moving. B The amount of kinetic energy in a system is a constant value C Energy can be converted from one form into another, but it cannot be destroyed D An object can have potential energy or kinetic energy, but not both at the same time.
Answer:
b
Explanation:
Section 2.2
6.
If an object has an acceleration of 20 cm/sec?. what do you know
about how its speed changes over time?
Answer:
Speed changes at the rate of 24 m/s for each second over time.
Explanation:
We are told the object's acceleration is equal to 24 m/s²
Now we know that acceleration can also be defined as the rate of change of speed with time. Also speed has a unit known as m/s.
Thus, we can rephrase the acceleration in this question to mean;
Speed changes at the rate of 24 m/s for every second with time.
A hockey ball accelerates from 0 m/s to 25 m/s in 0.05 seconds. What is the acceleration of the ball?
Answer:
500
Explanation:
25/0.05
Newton's Second Law says that the force applied to an object is equal to the mass of the object times its acceleration. In other words, F=ma. Use a rearranged version, a=F/m in order to calculate the acceleration of a 5 kg skateboard when you give it a push of 20 N. PLEASE HELP FAST!!
Here the force is 20 N and mass is 5 kg
acc= Force/mass
acc=20/5= 4m/s²
A person is running at 2 m/s and 20 s later is running at 22 m/s. What is
the acceleration of the runner?
TRUE or FALSE: An object's mass changes depending on which planet it is located.
A. TRUE
B. FALSE
Answer:
Fales
Explanation:
That's why scientists and engineers often measure an object's mass—how much matter the object contains—rather than its weight. Mass stays the same regardless of location and gravity. You would have the same mass on Mars or Jupiter as you do here on Earth. Your weight is different on other planets due to gravity.
2. What type of signals does the nervous system send? What carries these signals
Answer:
Nervous system messages travel through neurons as electrical signals. When these signals reach the end of a neuron, they stimulate the release of chemicals called neurotransmitters. Neurotransmitters travel across synapses, spaces between neurons or between neurons and other body tissues and cells.
Explanation:
A ball rolls 14.4 m in 12 12 sec. what is the speed
Answer:
1.2 mph
Explanation:
14.4 ÷ 12 = 1.2
What is the mass of an object that requires 150N of force in order to accelerate it at 10m/s 2
Answer: 15kg
Explanation:
F = ma ; Newtons 2nd of Motion
150 = m(10)
m = 15kg
Clara made a chart to summarize some of the evidence that supports the big bang theory.
A 2 column table with 2 rows labeled evidence for the big bang theory. The left column is labeled category of evidence with entries redshift, cosmic microwave background radiation (CMB). The second column is labeled description with entries light source and observer move farther apart, light observed shifts to a longer wavelength, indicates receding galaxies, red-shifted to the microwave region, temperature much higher now than at time of big bang.
Which best describes Clara’s error?
During redshift, the light source and observer move closer together, not farther apart.
The CMB is blue-shifted, not red-shifted, to the microwave region.
The temperature of the CMB is cooler, not hotter, than at the time of the big bang.
The redshift indicates approaching, not receding, galaxies.
Answer:
The temperature of the CMB is cooler, not hotter, than at the time of the big bang.
Explanation:
Hope it help
Mark me as brainliest
Answer:
C
Explanation:
EDG
Copper has the has a property of becoming a permanent magnet True False
Answer:
False
Explanation:
If you have a strong enough magnetic field all matter is magnetic. But copper is so weakly magnetic that we can't observe it without very, very large magnetic fields. So the short answer is "No, copper isn't magnetic." This can quickly be tested by trying to pick up a penny with a magnet.
BRAINLIST PLS!
What are the 2 types of ions.
Answer:
Anions have more electrons than protons and so have a net negative charge. Cations have more protons than electrons and so have a net positive charge. Zwitterions are neutral and have both positive and negative charges at different locations throughout the molecule.
Explanation:
In nature, what gets energy from nuclear fusion?
Answer:
Fusion powers the Sun and stars as hydrogen atoms fuse together to form helium, and matter is converted into energy.
What is the force that attracts metal to other metals called?
1.) magnetism
2.)gravity
3.)nuclear
4.) electricity
Answer:
1. Magnetism
BRAINLIST PLS!
Subduction creates ocean trenches true or false!
two students stand 4.0 meters apart and shake a jump rope, creating a standing wave with 5 antidotes. what is the wavelength of the standing wave?
1.6m
0.8m
4.0m
5.0m
Answer:
i think it is 5.0 m but im not sure sorry if im wrong
im in 7th grade
Explanation:
Someone please help me with this
Answer:
it's
Non-isolated system (conserved)
Explanation:
this is the answer for this hope it works
Plz help me!
How do electromagnetic fields work?
Answer:
Electromagnetic field, a property of space caused by the motion of an electric charge. A stationary charge will produce only an electric field in the surrounding space. If the charge is moving, a magnetic field is also produced. An electric field can be produced also by a changing magnetic field.
A dance form geared towards maximizing burning calories, created around the ___________ culture.
American
Italian
Brazillian
African
Answer:
Explanation:brazilian
A car accelerates on a road at 4.2 m/s2 for 6.5 seconds. How far does the car go doing this?
Answer:
mmmmmmmmmmm
Explanation:
mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
Work done against gravity is equal to change in
O kinetic energy
O potential energy
O frictional energy
Answer:
potential
Explanation:
EXPLAIN CONSERVATION OF MOMEMTUM WITH THE HELP OF COLLISION OF TWO OBJECT.
i hate this question.
Conservation of momentum - is when the total momentum before and after collision is equal.
Here is the formula darling,
p = p
mv = mv
See the pic for example. HmpH
Which of the following statements is true with regard to elastic and inelastic collisions
The air going into the tyre was warmed up by the pumping. What effect will this have on the motion of Gad molecules in the air in the tyre?
Answer:
they are constantly bouncing everywhere and creating preasure
Explanation:
The motion of gas molecules in the air in the tyre will speed up.
What is motion of molecules?Molecular motion is defined as the movement of molecules in a certain direction. The molecular motions are affected by heat and temperature. This is because the temperature is the measurement of the average kinetic energy of the molecules and represents the motion of molecules.
What is kinetic energy?The kinetic energy of an object is the energy which it possesses due to its motion. It gives the work needed to accelerate a body of a given mass from rest to its stated velocity. To calculate kinetic energy
[tex]K.E = \frac{1}{2} mv^{2}[/tex]
Kinetic energy depends on the velocity of the object which means that when the velocity of an object doubles, its kinetic energy quadruples.
Kinetic energy must always be either zero or a positive value.
Kinetic energy is not a vector.
The gas molecules inside the tyre exert pressure on the walls of the tyre as the molecules collide with the walls of the tyre.
When the air in the tyre becomes hotter, the pressure rises as more collisions.
The pressure in the tyre increases as there will be more frequent collisions with the tyre wall.
To learn more about Molecular motion here
https://brainly.com/question/14240663
#SPJ2
Write whether true or false...
a The forces on a floating object are balanced.
b The forces on a rocket taking off are balanced.
c The forces on a leaf accelerating to the ground are unbalanced.
d All objects that accelerate have balanced forces acting on them
Corrected versions of false statements:
E
Answer:
a --> true, b --> false, c --> true, d -->false
Explanation:
a) since it stays floating the gravity force and the upqards push is the same
b) if it's balanced the rocket won't move from the ground, the force of the rocket, has to exceed the force of gravity
c) since it's going in a diretion the force of gravity is exceeding the force pushing it up
d) since that are speeding up at a rate, meaning growing, the force is unbalanced.
Sorry if it’s a bit blurry. But thanks for answering if you do!
WILL MARK BRAINLIEST!
A ball has 600 J of GPE when it is 6 m above the ground. What is its mass?
A. 8 kg
B. 100 kg
C. 80 kg
D. 10 kg
Answer: 10
Explanation: 600j = m*10*6
600j/60= m
M=10kg
A train having speed of 85 km/h takes 5 hours to travel from Kerala to Karnataka. Calculate the distance between Kerala and Karnataka
Answer:
the distance between Kerala and Karnataka is 425 km.
Explanation:
Given;
speed of the train, u = 85 km/h
time taken for the train to travel from Kerala to Karnataka, t = 5 hours
The distance between Kerala and Karnataka is calculated as;
Distance = speed x time
Distance = 85 km/h x 5 h
Distance = 425 km
Therefore, the distance between Kerala and Karnataka is 425 km.
What do we use to spin magnets to supply the city of Portland electricity?
a. power from the Columbia
b. gasoline power
c. solar power
Answer:
a
hydroelectric dams on the Columbia river
Explanation: