Answer:
what subject?
Explanation:
Answer:
You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s.
The ball has KINETIC energy. Calculate it.
A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby
weighs 12 N. The carriage has POTENTIAL energy. Calculate it.
Explanation:
You serve a volleyball with a mass of 2.1 kg. The ball leaves your hand with a speed of 30 m/s.
The ball has KINETIC energy. Calculate it.
Calculate:
KE = 1/2mv^2=1/2(2.1kg)(30m/sec)^2= 945J
A baby carriage is sitting at the top of a hill that is 21 m high. The carriage with the baby
weighs 12 N. The carriage has POTENTIAL energy. Calculate it.
Calculate: PE = 2kg(9.8m/sec^2)21m = 411.6J
When on ________ it is important to reduce space.
offense
sideline
defense
sunday
Answer:
Defense
Explanation:
Answer:
offense
Explanation:
A car in stop-and-go traffic starts at rest, moves forward 12 m in 8.0 s, then comes to rest again. The velocity-versus-time plot for this car is given in the figure. What distance does the car cover in the first 4.0 seconds of its motion?
Answer:
48 meters per second
Explanation:
Distance travelled in a velocity - time - graph is the area under the graph. The distance covered in the first 4 seconds of its motion is 4.8 meters
From the question and the given graph, the following parameters are given:
Total distance travelled S = 12m
The total time = 8 s
The velocity (V) of the car = ?
We can get V by using the area of a trapezium formula. That is,
S = 1/2( a + b )V
Where from the graph;
a = 2 and b = 8
Substitute a, b, and S into the above equation
12 = 1/2( 2 + 8 )V
24 = 10V
V = 24/10
V = 2.4 m/s
The shape of the distance covered in the first 4 seconds in the graph is triangle.
Area of a triangle = 1/2 x base x height
where
Area = distance covered
base = time = 4s
height = speed V = 2.4
The formula can be re-written as:
S = 1/2 x t x V
substitute all the necessary parameters into the above formula
S = 1/2 x 4 x 2.4
S = 4.8 m
Therefore, the distance covered in the first 4 seconds of its motion is 4.8 meters
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Which of the facts listed below are true?
I. A solenoid is made from loops of wire or metal.
II. A solenoid is a straight line of wire.
III. A solenoid must always be made of plastic.
IV. A solenoid can generate a magnetic field from an applied electrical current.
V. A solenoid can be used to make an electromagnet.
A. I, IV, and V
B. II, III, and V
C. II, III, and V
D. I, III, and V
Imagine your teacher asks you to design an experiment where you test the effect of temperature on the growth of a plant. You have 5 plants that you plant and place in different temperatures around the room. What would your variables be and what would your constants be.
pls do it dont do it if u dont know
dont do it for the points
Answer:
the variable would be the temperatuer. and the water u give it would be constant.
Explanation:
the same amount of water go's to all of the plant's . and u cange the variable and your changing the temp .
Differences expensive and cheap physical models in science please help me I will give 30points
Answer:
The differences between expensive and cheap physical models in science are quality.
Explanation:
This is because cheap models prone to brake and may not be accurate! Expensive models are more sturdy and they are also more accurate to!
What are some ways to block fear from back tumbling?
Answer:
to trust your yourself and fundamentals! It's all mental just need a little more confidence.
Explanation:
You got this!
As a defensive player, your eyes should always be looking at your teammates and not the person you are defending.
False
True
Answer: false
Explanation: sos if it’s wrong
We learned that refraction is the bending of light and reflection is the bouncing of light. What do you think diffraction might be?
PLEASE HURRY, I'M TIMED! WILL GIVE BRAINLIEST! PLEASE ANSWER WITH WHAT YOU THINK DIFFRACTION IS!
Answer:
Diffraction of light occurs when a light wave passes by a corner or through an opening or slit that is physically the approximate size of, or even smaller than the light's wavelength
Firing the thrusters would have caused the pod to move in the opposite direction if
Answer:
The action from a force can cause an object to move or speed up (accelerate), to slow down (decelerate), to stop, or to change direction.
Explanation:
Answer: The force or movement can cause the pod to move, and change the direction in which the pod is going.
Explanation:
what are examples of a risk factor hypothesis
Answer:
going out instead of doing homework, drinking, smoking
Explanation:
1 How can you survive a lightning strike? –
2 Could a person survive in a falling lift if they jumped as it hits the ground? ...
3 Why do beans and sprouts make you pass gas? ...
What device was invented because of Faraday’s leap?
Five facts about wind, currents, and Coriolis effect. Please ensure that these five facts are in complete sentences.
Answer:
wind 1) Wind is the flow of gases, here on Earth it refers to the movement of air.
wind 2) It is caused by differences in air pressure.
wind 3)Short bursts of wind moving at high speeds are known as gusts.
wind 4) Depending on their strength, winds can be known as a breeze, gale, storm or hurricane.
wind 5) Windmills have been in use since 2000 B.C.
currents 1)The continuous flow of ocean currents is a natural effort to bring a horizontal heat balance.
currents 2) Warm currents bring rain to the coastal areas because they supply moisture to the winds.
currents 3)Cold polar currents bring large ice-bergs which are a source of fresh water.
currents 4) Warm currents keep the ports in the polar region operational because it makes an ice-free throughout the year.
currents 5)There are tremendous potentialities of producing power from the ocean currents.
Coriolis 1) Gustave-Gaspard Coriolis, was a French engineer-mathematician.
coriolis 2) In 1835 Coriolis mathematically described this concept.
Coriolis 3)The Coriolis Effect is based on the Laws of Motion discovered by Sir Isaac Newton.
Coriolis 4)Coriolis used mathematical formulas to show that the path of any object set in motion will curve in relation to objects on that surface.
coriolis 5) When it comes to projectile trajectories, terrestrial wind system, and ocean currents, the Coriolis effect is a good concept to account for.
Hope This Helped :)
In the textbox below, write a short paragraph describing how the speed of sound waves differs through different mediums. In your paragraph you must use the following terms:
sound
medium
solid
liquid
gas
particles closer together
particles further apart
fastest or fast
slowest or slow
As you use the vocabulary words in your paragraph be sure to highlight them.
How can density be used to describe Earth’s Layers?
Answer:
Earth has layers because of density. Dense materials such as iron sank to the middle of the Earth, the center of its gravity. Less dense materials stayed at the top.
Plz Help I kinda need the answer rn
Answer:
think its 2 .............
Can a flame be two different colors
Answer:
Yeah, it can be yellowish-orange or blue
Explanation:
It depends on the energy level of photons emitted
Answer: yes it can be yellow orange, blue, white
Explanation:
What determines how much light will be reflected off of a surface?
The speed of light.
The density of the object.
How reflective the surface is.
The mass of the object.
Answer:
How reflective the surface is.
__________ affects the colors that we see.
refraction
reflection
diffraction
Hi!
Your answer is Reflection!
Hopefully this helps! Please correct me if im wrong ^^
Distinguish between the terms displacement and position
Student Name Potential Energy Rating (lowest to highest)
Henry gas, liquid, solid
Jasmine gas, solid, liquid
Lucas solid, gas, liquid
Tasha solid, liquid, gas
Four students rank the potential energies of some states of matter. Which student is correct?
(1 point)
Lucas
Jasmine
Tasha
Henry
A substance's potential energy decreases from solid to liquid to gas to plasma in that order. The most potential energy and least kinetic energy would be in the solid state. So, Henry is correct.
What is Potential energy?Potential energy is a type of stored energy that depends on the relative locations of various system components. A spring's potential energy increases when it is stretched or compressed. The potential energy of a steel ball increases as it is raised above the earth's surface as opposed to when it is brought to the planet.
It can perform more work in the raised position. Potential energy is a system property, not a feature of a single entity or particle. For example, the system made up of Earth and the elevated ball has greater potential energy as they are further apart.
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Cora wants to draw a model of an atom for her project for the science fair. She wants to draw an atom that has two protons, four neutrons, and two electrons. Which model is like Cora’s?
At the center, 2 unmarked red balls are interspersed with 4 blue balls marked with plus signs. A green cloud with 1 concentric white line surrounds the center, with 2 small green balls marked with minus signs on the white line.
At the center, 4 unmarked red balls are interspersed with 2 blue balls marked with plus signs. A green cloud with 1 white line surrounds the center, with 2 small green balls marked with minus signs on the white line.
At the center, 2 unmarked red balls are interspersed with 2 blue balls marked with plus signs. A green cloud with 1 white line surrounds the center, with 4 small green balls marked with minus signs on the white line.
At the center, 4 unmarked red balls are interspersed with 2 blue balls marked with plus signs. A green cloud with 1 white line surrounds the center, with 4 small green balls marked with minus signs on the white line.
Answer:
The answer is b i got it right on edgen
Answer:
b
Explanation:
Select the statement that best describes how fundamental forces relate.
A. All forces begin equally and become varied. The object on which they are acting and the distance to that object determines the amount of force.
B. Weak nuclear and magnetic forces are different because magnetic forces are associated with unmoving charges, and weak nuclear forces are associated with moving charges.
C. All forces are related to the mass of the object on which they are acting. The larger the mass, the weaker the forces become.
D. Electromagnetic and gravitational forces are similar because they both include the interaction between attractive forces.
Answer: I think it is C
Explanation: All forces are related to the mass of the object on which they are acting. The larger the mass, the weaker the forces become.
Answer: The correct answer is (D) NOT C.
D: Electromagnetic and gravitational forces are similar because they both include the interaction between attractive forces.
Explanation:
I already did that test and I did well with the answer D.
Help fast please ! 8th grade science - energy stuff :)
How is energy different from work (your own words please)
Charlotte Hornets NBA BASKETBALL TEAM
Answer:
I've heard both good and bad things about them! I'm going to go educate myself now
Explanation:
:)
Answer:
How good are they?
Explanation:
When two defenders are guarding one offensive player, it is called a _____.
oligarch
jump
maze
trap
Answer:
trap
Explanation:
A defender should pivot when they wish to change their ______.
angle
speed
strength
tempo
When doing defensive slides, it is important to stay on your ______.
heels
hands
spot
toes
Scientists often use containers to hold chemicals. A beaker can hold solids or liquids that won’t release gas and are unlikely to splatter if stirred or heated. A test tube is basically a smaller version of a beaker. It can hold small amounts of chemicals. If you’re worried about a substance splattering, an Erlenmeyer flask might be a good tool to use. Erlenmeyer flasks have a triangular shape to minimize splattering and spilling. To be extra safe about spills, you might use a stopper. However, never heat a container with a stopper on it!
According to the passage, why is a substance in an Erlenmeyer flask less likely to spill than a substance in a beaker?
A
because Erlenmeyer flasks can never be heated
B
because Erlenmeyer flasks can only hold solid substances
C
because Erlenmeyer flasks hold smaller amounts of substances than beakers
D
because Erlenmeyer flasks have a triangular shape
Answer:
D) because Erienmeyer flasks have a triangular shape
Explanation:
Answer:
D
Explanation:
how does a pendulum shows the relationship between gravitational potential energy and kinetic energy and mechanical energy?
Answer:
In a simple pendulum with no friction, mechanical energy is conserved. Total mechanical energy is a combination of kinetic energy and gravitational potential energy. As the pendulum swings back and forth, there is a constant exchange between kinetic energy and gravitational potential energy.
The relationship between the gravitational potential energy and kinetic energy and mechanical energy should be explained below.
Relationship of various energies:In the case of a simple pendulum that does not contain friction, here the mechanical energy should be conserved. The total mechanical energy comprises of kinetic energy and gravitational potential energy. At the time when the pendulum should swing back and forth so there should be a constant exchange that lies between the kinetic energy and gravitational potential energy.
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