Atoms have no electric charge because they have an equal number of electrons and protons.
Explanation:
Atom is the smallest unit of matter.It is comprised of three subatomic particles: protons, electrons, and neutrons.Electrons are found outside the nucleus of an atom and are negatively charged.Protons are found inside the nucleus of an atom and are positively charged.Neutrons are found inside the nucleus of an atom and have no charge.They are electrically neutral because they have an equal number of protons and electrons.So from this, we can conclude that atoms have no electric charge because they have an equal number of electrons and protons. Option C is correct.
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A pizza delivery car, parked 200 m East of a restaurant, moves to a position 600 m West of the same restaurant in 18 s. Calculate the average velocity of the delivery car in moving to its new position
Answer:
22.2m/sExplanation:
Average velocity is expressed as;
Average velocity = Displacement/Time
Get the displacement
If a pizza delivery car, parked 200 m East of a restaurant and moves to a position 600 m West
The displacement = 600 -200
Displacement = 400m
Time = 18s
Substitute and get the velocity;
Average velocity = 400/18
Average velocity = 22.2m/s
Hence the average velocity of the delivery car in moving to its new position is 22.2m/s
A student is playing with a pendulum. He gives the ball a push and watches the ball as it swings. After a while, the ball stops swinging.Why does the ball stop swinging?
give reason: the liquid pressure varies with the depth.
can I get the answer fast??
Answer:
This is due to an increase in hydrostatic pressure, the force per unit area exerted by a liquid on an object. The deeper you go under the sea, the greater the pressure of the water pushing down on you.
What is Physics? How is Physics used in your everyday life? Give at least two examples and explain your answer. You need at least 3
Answers:
The transportation industry is no stranger to the manipulation of everyday physics. Cars and trains utilize the wheel, which provides a smooth, steady motion.
The ears hear sounds which occur through the movement of air molecules, and the chemistry that drives all of biology depends on the physics of energy and molecules. Every day, for example, plants absorb sunlight, water, and carbon dioxide, creating glucose and releasing oxygen as a byproduct.
Brainlist pls!
If there is an unbalanced force acting on an object, the object will?
(A)Accelerate
(B)Move at a constant velocity
(C)Remain at rest
(D)Change direction
Answer:
A
Explanation:
because newton's second law states that if a resultant force acts on an object then, it will accelerate in the direction of the resultant force
An object is traveling at a constant velocity of 10 m/s when it experiences a constant acceleration of 3.5 m/s2 for a time of 10 s. What will its velocity be after that acceleration?
Answer:
The final velocity of the object is 45 m/s.
Explanation:
Given;
initial velocity of the object, u = 10 m/s
acceleration of the object, a = 3.5 m/s²
time of motion, t = 10 s
The final velocity of the object is given as;
v = u + at
where;
v is the final velocity of the object
v = 10 + (3.5 x 10)
v = 45 m/s
Therefore, the final velocity of the object is 45 m/s.
What are clouds called that generate rain?
A) cirrus clouds
B) nimbus clouds
C) stratus clouds
D) cumulus clouds
Answer:
B= nimbus clouds
Answer:
B= nimbus clouds
A plant is said to be an exact copy of the parent plant when it has ALL the same characteristics that the parent plant has. Do you agree with this statement? Justify.
Explanation:
In Asexual reproduction , part of parent plant is detached and grows to become a complete plant. In this process plant produced is generally identical to the its parent plant. It has ALL the same characteristics that the parent plant has. However, this is not true in case of sexual reproduction of plants.
The sum of all forces acting on an object is what is referred to as _________
Group of answer choices
Mass
Net Force
weight
Normal force
hELP PLS ITS BEEEN A DAY AND A HALF im lit rally stuck pls i lost 10 points and didnt get the answer help me pls
Answer:
The height of the hurdler when he clears the hurdle is approximately 1.1045 meters (high)
Explanation:
The given parameters are;
The distance the hurdler is from the hurdle, d = 0.535 m
The velocity with which the hurdler jumps, u = 6.82 m/s
The angle at which the hurdler jumps, θ = 67.9°
The horizontal component of the velocity is uₓ = u × cos(θ)
∴ uₓ = 6.82 × cos(67.9°) ≈ 2.566 m/s
The time it takes, t, the hurdler to get to the hurdle horizontally 0.535 m away is given as follows;
Time, t = Distance/Velocity = d/uₓ = 0.535 m/(2.566 m/s) ≈ 0.2085 s
t ≈ 0.2085 s
The kinematic equation of vertical motion, under gravity can be presented as follows;
h = [tex]u_y[/tex]·t - 1/2·g·t²
Where;
h = The height reached by the hurdler in time t
[tex]u_y[/tex] = The vertical component of the velocity = u × sin(θ)
g = The acceleration due to gravity
∴ [tex]u_y[/tex] = 6.82 m/s × sin(67.9°) ≈ 6.3189 m/s
[tex]u_y[/tex] ≈ 6.3189 m/s
Substituting the known values gives;
h = 6.3189 × 0.2085 - 1/2×9.8×0.2085² ≈ 1.1045 m
The height of the hurdler when he clears the hurdle, h ≈ 1.1045 m.
A 5-N force is applied to a 3-kg ball to change its velocity from +9 m/s to +3 m/s. What is the impulse?
Answer:
-18 Nm
Explanation:
Impulse = Change of Momentum
I = ∆p
I = mv2 - mv1
I = 3 x 3 - 3 x 9
I = 9 - 27
I = -18 Nm
_______is a speed in a certain direction.
a. Acceleration
b. Friction
C. Momentum
d. Velocity
Question 24 (1 point)
A 85 kg boy is riding his bicycle in circles with a radius of 7.2 meters. It takes him 6
seconds to make ones revolution. What is his velocity?
730 m/s
0.53 m/s
1.25 m/s
4:
7.54 m/s
A boy of mass 85 kg is riding a bicycle in a circle with a radius of 7.2 meters, and it takes 6 seconds to make one revolution, then his velocity will be equal to 7.54 m/s.
What is tangential velocity?The movement of an object along the circle's edge which path is always at the tangent to any specific point on the circle is described by tangential velocity.
As a result, tangential velocity is the amount of motion along a circle's edge that may be measured at any given time.
The speed at any location that really is tangent to the rotating wheel is quantified as the tangential velocity in a circular motion. The connection between rotational acceleration and tangential velocity is expressed by the formula. The part of movement along the circle's edge that can be detected at any time is called tangential velocity.
The given data in the question,
Radius, r = 7.2 meters.
Time, t = 6 seconds.
v = 2πr / t
v = 2π(7.2)/6
v = 7.54 m/s.
Therefore, the velocity of the boy is 7.54 m/s.
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A basketball player jumps straight up with a speed of 14 m/s. How high did the player jump?
Answer:
ttrftyrdy
Explanation:
tytrterte
this will have to do with that which statement describes seismic waves?
Answer:
an elastic wave in the earth produced by an earthquake or other means
Explanation:
Answer:
They carry energy
Explanation:
Why does a third class lever cannot magnify force?
Explanation:
The third class lever cannot magnify our force because in third class lever the effort it between the load and the fulcrum. Also, in this type of lever no matter where the force is applied, it is always greater than the force of load. Hence, That type of lever cannot magnify our force.
Plz help me and HAPPY NEW YEAR ♧
Energy stored in the bonds between atoms is called
A.kinetic energy.
B.mechanical energy.
C.chemical energy.
D.thermal energy.
Answer:
it's answer is Compound chemical energy
hope it helps you
two sources of error and precaution in the centre of gravity experiment
Answer:
The answer to this question is given below in this explanation sections.
Explanation:
The weight of an object is concentrated at the center of gravity.The term center of gravity is used interchangeably with center of mass.For a symmetrical object the center of mass is located at the geometric center of the object.If the object is not symmetric we can determined the center of mass using the mentioned below.
Materials:
cardboardweight(washer,bolt,or fishing weight)hole punchpencilProcedure:
Cut the cardboard into a strange shape.Do not use a circle,square,rectangle,or any other common geometric shape.Punch a hole near the edge of the cut-out cardboard piece and hang it from a nail.Place the weight, a washer or bolt, on a thread and tie it off.Hang the thread and weight from the nail in front of the cardboard.use a pencil to draw a plumb line down the cardboard where the thread touches.This mark your center line from that hanging point.conclusion:
What would happen to the center of gravity of the shape if you were to spin it freely?
center of gravity experiment:
Balance a ruler with a hammer.Take a rubber band or string and make a loose loop around the hammer and ruler. Make sure the end of the hammer is touching the ruler,and then positions the ruler at the edge of the table.Balance two forces with a toothpick.A common magic trick using the properties of center of gravity.The two forks are balanced on the edge of the glass by a toothpick. Stand with your back and feet against a wall.Have someone place quarter on the floor at your feet.Try to pick it cup.Most people cant make these adjustments.Stand against a wall sideways with your arm and leg touching the wall,with nothing to from the out away hold onto.Try to lift your other leg straight out away from the wall.you wont be able to do it.The girls away win chairs lifting challanges place dining chairs against a wall.Bend over the chair so that your head touches the wall and you upper body is parallel to the floor.lift the chair to your chest to your chest and then try to stand up.A basketball player jumps straight up with a speed of 14 m/s. How high did the player jump?
Answer:
The basketball player jumped 10 m high.
Explanation:
Vertical Launch Upwards
In a vertical launch upwards, an object is launched vertically up without taking into consideration any kind of friction with the air.
If vo is the initial speed and g is the acceleration of gravity, the maximum height reached by the object is given by:
[tex]\displaystyle h_m=\frac{v_o^2}{2g}[/tex]
The basketball player jumps up with a speed of vo=14 m/s. The maximum height is:
[tex]\displaystyle h_m=\frac{14^2}{2*9.8}[/tex]
[tex]\displaystyle h_m=\frac{196}{19.6}=10[/tex]
The basketball player jumped 10 m high.
1. how much time will it take for a bug to travel 5.0 meters
If it travels it a velocity of 1.4 m/s South?
There are some laws of physics that have to do with motion. For example Newton's first law of motion states that objects ______ or ______ will stay unless acted upon by __________.
Answer:
Newton's first law of motion states that objects state of rest or uniform motion will stay unless acted upon by an external force
Explanation:
Newton's first law of motion is also called the Law of Inertia. Because, it describes the property of inertia of the body. Newton's First Law states that every object continues its state of rest or uniform motion, until or unless it is acted upon by an external force. It means that if an object is in state of rest, it will remain at rest until or unless an external force is not applied to it. Same goes for the state of uniform motion. Hence, the answer will be:
Newton's first law of motion states that objects state of rest or uniform motion will stay unless acted upon by an external force
Answer: Newton's first law of motion states that objects at rest or in motion will stay unless acted upon by a net external force.
Explanation:
Motion is typically described in terms of velocity, acceleration, displacement and time. An object's velocity cannot change unless it is acted upon by a force, as described by Newton's first law also known as inertia. More generally, the term motion signifies any spatial and or temporal change in a physical system.
Many scientists have studied motion and it's properties because of its importance to life. The Italian, Galileo Galile, who lived from 1564 to 1642, did the first systematic study of motion. Also Sir Issac Newton did more detailed work on the study of motion. In his works in motion he came about three different laws.
- Newton's first law: This states that objects at rest or in motion will stay unless acted upon by a net external force.
-- Newton's second law: This states that the force on an object is equal to its mass times its acceleration.
- Newton's third law: This states that for every action there is an equal and opposite reaction.
Lavon is going to the beach on a hot summer day. He wants to take a bottle of cold water
What material would be best to wrap the bottle to keep the water cool?
Answer:
aluminum foil and cotton
Explanation:
It was found that the aluminum foil and cotton were the best insulators for keeping the water cold while the Styrofoam sheets and the bubble wrap were the worst two insulators for keeping the water cold.
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The radius of a Bromine (Br) atom is 100 pm. What is its' Circumference?
Answer:
The circumference of the bromine atom is 628 pm
Explanation:
The formula for the circumference of a circle is 2πr.
Where π is 3.14 and r is the radius of the circle.
Since atoms have a circular shape. The formula above can be used to determine the circumference of an atom (bromine atom in particular).
circumference of the bromine atom is 2πr (where r is 100 pm)
2 × 3.14 × 100 = 628 pm.
The circumference of the bromine atom is 628 pm
Please help me with this question
Answer: m∠P ≈ 46,42°
because using the law of sines in ΔPQR
=> sin 75°/ 4 = sin P/3
so ur friend is wrong due to confusion between edges
+) we have: sin 75°/4 = sin P/3
=> sin P = sin 75°/4 . 3 = (3√6 + 3√2)/16
=> m∠P ≈ 46,42°
Explanation:
The ratio between the velocity of microwaves to the velocity of gamma ray in air is_____ .
less than 1
greater than 1
equal to 1
no correct answer
Answer:
velocity of all electromagnetic waves are
[tex] \huge3 \times {10}^{8} m {s}^{ - 1} [/tex]
So, the ratio is equal to 1.
Describe two adaptations and explain how they help you survive.
Answer:
My feet and my fists
Explanation:
My feet help me walk
and my fists help me one punch people
In a college homecoming competition, eighteen students lift a sports car. While holding the car off of the ground, each student exerts an upward force of 400 newtons. What is the mass of the car in kilograms?
734.19567 Kilogram Force
Explanation:
7200 Newton = 734.19567 Kilogram Force
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Date:
Name:
1. According to the text, what are plastics made of?
A. specially treated silicon
B. negatively charged particles
C. long chains of carbon molecules
D. a standard photovoltaic cell
Answer:
c. long chains of carbon molecules
A 1405 kg car is accelerating at
1.77 m/s? Its engine creates a forward
force of 3150 N, and air resistance
creates a backward force. What is
the magnitude (+) of the force of
air resistance or the car?
(Unit = N)
Answer:
fair = 663.15 [N]
Explanation:
To solve this problem we must use Newton's second law, which tells us that the sum of forces on a body is equal to the product of mass by acceleration.
∑F = m*a
where:
∑F = forces applied [N]
m = mass = 1405 [kg]
a = acceleration = 1.77 [m/s²]
In this way, we have two forces, the one that develops the engine to move the car and the resistance force of the air that opposes the movement of the car.
[tex]3150-f_{air}=m*a\\3150-f_{air}=1405*1.77\\f_{air}=3150-2486.85\\f_{air}=663.15[N][/tex]