Answer:
When a negative charge is brought near one end of a conductor electrons are repelled. ... When electric voltage is applied, an electric field within the metal triggers the movement of the electrons, making them shift from one end to another end of the conductor. Electrons will move toward the positive side.
is it possible for a tennis ball to have more momentum than a cannonball? explain
A softball is thrown perfectly vertically (straight-up) at 18 m/s.
a) How high will it go?
b) Find the total time the ball is in the air.
Answer:
a) y = 16.51 [m]
b) t = 1.83 [s]
Explanation:
To solve this problem we must use two kinematics equations, the first to determine the height to which the ball reaches, and the second equation to determine how long it lasts in the air.
[tex]v_{f} ^{2}= v_{i} ^{2} - (2*g*t)\\[/tex]
where:
Vf = final velocity = 0
Vi = initial velocity = 18 [m/s]
g = gravity acceleration = 9.81[m/s^2]
t = time [s]
Note: the negative sign of the Equation indicates that the acceleration of gravity acts in the opposite direction to the movement of the ball. The final velocity is zero, since the ball reaches its maximum altitude when the velocity is zero.
Now replacing:
0 = (18)^2 - (2*9.81*y)
y = 16.51 [m]
b)
[tex]v_{f} = v_{i} - (g*t)[/tex]
0 = 18 - (9.81*t)
t = 1.83 [s]
The photo shows a person pumping gasoline into a car
Which TWO of these energy transformations will occur when the car’s engine starts?
A. Chemical energy —> thermal energy
B. Chemical energy —> mechanical energy
C. Mechanical energy —> Chemical energy
D. Thermal energy —> chemical energy
_____________________
Choose TWO
Answer:
It is CHEMICAL TO MECHANICAL because gas is a chemical which is transferred to mechanical technologies
Answer:
The first one is ^^
The SECOND one is chemical energy to thermal energy
You're welcome for getting wrong so that you can now get it right :|
A box is suspended from a crane at a height of 32 m from the ground. The box has 7840 j of gravitational potential energy. What is the mass of the box
Answer:
The mass of the box is 24.97 [kg]
Explanation:
In order to solve this problem, we must use the concept of potential energy, which is defined as the product of mass by gravity by height. So we have the following equation.
[tex]E_{p} =m*g*h[/tex]
where:
Ep = potential energy [J]
m = mass [kg]
g = gravity acceleration = 9.81 [m/s^2]
h = elevation = 32 [m]
7840 = m*9.81*32
m = 24.97 [kg]
An apple suddenly drops a distance of 3.2 m from a tree. If the acceleration due to gravity is 9.8 m/s2, how long does it take the apple to reach the ground?. Give your answer to two decimal places.
Answer:
0.33 seconds
Explanation:
The time taken by the apple to reach the ground will be 0.8 seconds.
What is velocity?The velocity of an object is the ratio of its travel distance over a given amount of time. The magnitude and direction are both necessary for the velocity because it is a vector quantity.
Given that an apple suddenly drops a distance of 3.2 m from a tree. If the acceleration due to gravity is 9.8 m/s². The time taken by the apple to reach the ground will be calculated by the formula below:-
Time = √ ( 2s)/g)
Time = √ ( 2 x 3.2 )/9.8)
Time = 0.8 second
As a result, it will take the apple 0.8 seconds to reach the ground.
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A child blows a leaf from rest straight up in the air. The leaf has a constant upward acceleration of magnitude 1.0\,\dfrac{\text m}{\text s^2}1.0 s 2 m 1, point, 0, start fraction, start text, m, end text, divided by, start text, s, end text, squared, end fraction. How much time does it take the leaf to displace 1.0\,\text m1.0m1, point, 0, start text, m, end text upwards?
Answer:
Explanation:
Given
Acceleration a = 1.0m/s²
Displacement S = 1.0m
Required
Time t taken by the leaf to displace
Using the equation of motion
S = ut+1/2at²
Substitute
1.0 = 0+1/2(1)t²
1 = t²/2
Cross multiply
t² = 2
t = ±√2
t = 1.41secs
It takes the leaf to 1.41s to displace by 1m upward
How do you measure the weigh of an object
Answer: Weight is a measure of the force of gravity pulling down on an object. It depends on the object's mass and the acceleration due to gravity, which is 9.8 m/s2 on Earth. The formula for calculating weight is F = m × 9.8 m/s2, where F is the object's weight in Newtons (N) and m is the object's mass in kilograms.
Answer:gravity pulling down on an object
Explanation:
An object at rest has equal forces acting on it. This can be described as a(n) _____________ force.
gravity
unbalanced
balanced
physical
A stone is projected vertically upwards with a velocity of 30m/s from a tower of height 50m negleting air resistance,determine the maximun height it reached from the ground (g=10ms^-1)
Does change in direction affect the acceleration of a car?
Answer:
A change in velocity is either a change in an object's speed or its direction. When a moving object changes direction, its velocity changes and it is accelerating.
Explanation:
Help asap please. How would I do this?
Answer:
what to answer I don't know sorry
mark as branliest
The energy of electromagnetic waves increases with decreasing wavelength.
Which of the following statements support this claim?
O A. Dental patients need to wear lead aprons to protect themselves from X-rays but do not wear
protection from flashlights.
B. Both radio waves and gamma rays are invisible to human eyes.
C. Ultraviolet radiation causes sunburn but radio waves do not.
D. Microwaves are used for communication.
E. Gamma rays are used to kill cancer cells, but microwaves have no known effect on cancer
cells.
Answer: A C E
Explanation: i just did it and got it right lol
Answer:
its A, C, and E
Explanation:
i did it and got it right
How long does a dream typically last near the end of the sleep cycle, just before waking?
A.
about 5 minutes
B.
about 15 minutes
C.
about 30 minutes
D.
about 50 minutes
pleaseeeee hurryy
Answer:
C) about 30 minutes
Explanation:
edge 2023
What is the weight of a 4.5 kg mass on Earth?
Answer:
7.535×10^25 earth mass
Explanation:
for an approximate result,divide the mass value by 9.223e+18
When objects are charged by _______, they do not need to touch each other.
A.
friction
B.
induction
C.
conduction
D.
all of these
Answer:
B. Induction
Explanation:
Just had it on study island
When objects are charged by induction, they do not need to touch each other. Hence, option (B) is correct.
What are different process of charging?A charged particle is touched to a conductive medium as part of the charging by conduction process. In this manner, the conductor receives the charges from the charged substance.
Rubbing one particle against another causes electrons to move from one surface to another during the charging by friction process.
An object is charged using induction charging, which doesn't require physical contact between the charged objects. The charged particle is held close to an uncharged conductive substance that is grounded on a neutrally charged material during the charging by induction process.
When a charge is transferred between two objects, an uncharged conductive substance produces an oppositely polarized charge. These were the many charge transfer techniques.
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Which answer best explains why clouds usually form high in the sky?
It is cool enough for the water vapor to begin condensing
It is warm enough for the water vapor to begin condensing
It is dry enough for precipitation to form from
it is dry enough for water vapor to form a cloud
Answer: As air rises the moisture in it slowly reaches its saturation point and when this happens, tiny crystals of water start to condense and form clouds.
Explanation:
The elevators in the Landmark Tower in Yokohama, Japan are among the fastest in the world. After starting from rest, they reach a maximum speed of 120 meters per minute. It takes the elevator 4.0 seconds to reach maximum speed. What is its acceleration in m/s/s (meters per second per second)?
Answer:
The acceleration is 30 m/s²
Explanation:
Given that,
Maximum speed = 120 m/s
Time = 4.0 sec
We need to calculate the acceleration
Using equation of motion
[tex]v=u+at[/tex]
Where, v = speed
u = initial speed
a = acceleration
t = time
Put the value into the formula
[tex]120=0+a\times4.0[/tex]
[tex]a=\dfrac{120}{4.0}[/tex]
[tex]a=30\ m/s^2[/tex]
Hence, The acceleration is 30 m/s²
An object is said to move from a position of 10m East to a position of 5m west. Determine the object's distance travelled.
Answer:
5 i think
Explanation:
A parachute on a racing dragster opens and changes the speed of the car from 79.33 m/sec to 41.55 m/sec in a period of 5.21 seconds. What is the acceleration of the dragster?
Answer:
c: -7.25
Explanation:
Here we can use the equation v=u+at
Where v is the final velocity
u is the initial velocity
a is acceleration
and t is time
41.55=79.33+a(5.21)
41.55-79.33=5.21a
-37.78=5.21a
a=-7.25 m/[tex]s^2[/tex]
The negative sign is due to the fact that they are slowing down
True or False : the collect of evidence fall onto the detectives that arrive at a crime scene
Answer:true
Explanation:
A projectile is launched at an angle above the ground. (upwards). The vertical
component of the projectile's velocity is initially 30 m/s. What is the vertical velocity
after 2.0 seconds of flight?
If you could solve one of
the world's greatest problems, which one would
you choose? Why did you choose this problem to
solve?
Answer:
the pollution
Explanation:
because is making big consecuences in the world
If I could solve one of the world's greatest problems, then I would like to choose pollution problem.
I would choose the pollution problem to be solved because it affects various natural resources of the environment.
Pollution is one the biggest issue in the world these days and It is rising day by day. It affects the environment directly or indirectly.
There are various types of pollution. Some of thees are
Water pollutionAir pollutionNoise pollution.The main cause of water pollution is various toxic substances got mixed in various water resources.
Similarly Air Pollution happens because of the harmful gases and substances present in the air.
Noise pollution occurs due to the sound of machines, loud musics and sound of vehicles.
Every human being should take steps to solve the issue of the pollution.
For more information about the pollution, follow the link given below.
https://brainly.com/question/1040743.
What are some examples of an element? How do you know they are an element?
HELP PLZ ITS DUE SOON
A ball is thrown vertically upwards from a point on the ground. It was observed at a height h twice with a time interval Δt. The initial velocity of the ball is?
A 20,000 kg jet plane is accelerating at 2 m/s2. How much force does it put forth?
Answer:
40,000N of force
Explanation:
The formula for force is F=ma. If we plug in the values, F=(20,000kg)(2m/s^2).
Which of these BEST explains how Earth's surface features are formed by moving tectonic plates? *
5 points
Earth's gravity acts as an opposing force, causing the crust to push upward, break into individual plates, and move along the surface.
The minerals in lithospheric plates are attracted to Earth's magnetic poles, which causes them to move along the surface.
The spinning of Earth's outer core causes the lithosphere to break into individual plates and collide with each other.
Earth's crust is separated into individual plates that float on top of molten material, convection currents in the mantle cause them to slowly move.
Answer: The spinning of Earth's outer core causes the lithosphere to break into individual plates and collide with each other.
Earth's surface forms because of this reason:
The spinning of Earth's outer core causes the lithosphere to break into individual plates and collide with each other.
The speed of an object changes only when it is acted on by an unbalanced force.
Answer:
If an object has a net force acting on it, it will accelerate. The object will speed up, slow down or change direction. An unbalanced force (net force) acting on an object changes its speed and/or direction of motion. An unbalanced force is an unopposed force that causes a change in motion.
Explanation:
I hope this helps you out and if your feeling generous plz mark brainliest it helps me a lot thank you:)
Which graph shows the change in velocity of an object in free fall?
Answer:
C!
Explanation:
I just did the test !
Please stay safe and wear a mask , we are in the mist of a pandemic ! !
The graph shows the change in velocity of an object in free fall is according to option C.
What is free falling?When an object is released from rest in free air considering no friction, the motion is depend only on the acceleration due to gravity, g.
When an object is made to fall freely, it's velocity is only depended on the acceleration due to gravity, g. The velocity decreases till it become zero.
Thus, the correct option is C.
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1 ) Starting from rest, a toy rocket accelerates at 12 m/sec/sec for exactly 4.0 seconds. It reaches 48 m/sec. Find the distance moved.
In what direction must he walk in order to return to his original position?
30 degrees N of W
40 degrees N of W
40 degrees NW
50 degrees N of W
A rectangular field has one side fence 500m land and another side fond zoom
Answer:
40 dedrees south
Answer:
40 degrees south
Explanation:
