Explanation:
Yes, it is possible to have zero speed while accelerating, but only for a moment. ... acceleration is the rate at which the speed and direction of an object changes over time, so whenever an object goes through zero speed while reversing directions, it has non-acceleration. zero but a speed of zero.
BRAINLEST TO SOMEONE WHO ACTUALLY ANSWERS AND FREE 100 POINTS TO REAL ANSWER 2. Using the average time, calculate the oscillation period, or the time it took for one oscillation. Fill the averages into the orange cells in the data table. (2 points)
a. Reminder: the times in the data table are for five oscillations. The period of a pendulum is equal to one oscillation (one back and forth). So, divide the average time by five to get the time for
one oscillation.
Answer:
IM SO SORRY :((
Explanation:
two cars collide at an intersection. one car has a mass of 1600 kg and is moving 8 m/s to the north, while the other has a mass of 1400 kg and is moving 12 m/s to the south. what is the combined momentum?
Answer:
Combined momentum = 12,000 Kgm/s
Explanation: 4000 kg m/s south
hope that helps :)
Write down the formula of expansion
Answer:
well for me it's
Explanation:
L2-L1/L1(O2-O1)
O is the change in temperature
How fast does water flow from a hole at the bottom of a very wide, 3.2 m deep storage tank filled with water
Answer:
the velocity of the water flow is 7.92 m/s
Explanation:
The computation of the velocity of the water flow is as follows
Here we use the Bernouli equation
As we know that
[tex]V_1 = \sqrt{2g(h_2 - h_1)}\\\\=\sqrt{2g(\Delta h)} \\\\= \sqrt{2\times9.8\times3.2} \\\\= \sqrt{62.72}[/tex]
= 7.92 m/s
Hence, the velocity of the water flow is 7.92 m/s
We simply applied the above formula so that the correct value could come
And, the same is to be considered
Energy Conservation With Conservative Forces: If a spring-operated gun can shoot a pellet to a maximum height of 100 m on Earth, how high could the pellet rise if fired on the Moon, where g
Answer:
h' = 603.08 m
Explanation:
First, we will calculate the initial velocity of the pellet on the surface of Earth by using third equation of motion:
2gh = Vf² - Vi²
where,
g = acceleration due to gravity on the surface of earth = - 9.8 m/s² (negative sign due to upward motion)
h = height of pellet = 100 m
Vf = final velocity of pellet = 0 m/s (since, pellet will momentarily stop at highest point)
Vi = Initial Velocity of Pellet = ?
Therefore,
(2)(-9.8 m/s²)(100 m) = (0 m/s)² - Vi²
Vi = √(1960 m²/s²)
Vi = 44.27 m/s
Now, we use this equation at the surface of moon with same initial velocity:
2g'h' = Vf² - Vi²
where,
g' = acceleration due to gravity on the surface of moon = 1.625 m/s²
h' = maximum height gained by pellet on moon = ?
Therefore,
2(1.625 m/s²)h' = (44.27 m/s)² - (0 m/s)²
h' = (1960 m²/s²)/(3.25 m/s²)
h' = 603.08 m
A heat engine receives 6000 J of heat from its combustion process and loses 4000 J through the exhaust and friction. What is its efficiency
Answer:
The efficiency of the heat engine is 33.33%.
Explanation:
Given;
input energy of the heat engine, = 6000 J
energy lost by the heat engine, = 4000 J
output energy of the heat engine = 6000 J - 4000 J = 2000 J
The efficiency of the heat engine is given as;
Efficiency = output energy / input energy
Efficiency = 2000 / 6000
Efficiency = 0.3333
Efficiency (%) = 33.33%
Therefore, the efficiency of the heat engine is 33.33%.
A scientist heated a tank containing 50 g of water. The specific heat of water is 4.18 J/gºC. The temperature of the water increased from 25ºC to 37ºC. How much heat energy did the water absorb?
1: 2,508 joules
2: -2,508 joules
3: 5,225 joules
4: 7,733 joules
Answer: a) 2,508
Explanation:
A car is being driven down a level track with no net force on it. This motion is best described as
A)Linear motion
B)circular motion
C) periodic motion
D) projectile motion
A)Linear motion
If there is not net force on the car, then by the Newton Second Law, the acceleration is zero, and the only valid option for zero acceleration is A).
Which example is most likely made from both metals and gemstones?
Answer:
A Necklace is most likely made from both metals and gemstones
Explanation:
Brainliest?
A person throws a pumpkin at a horizontal speed of 4.0 m/s off a cliff. The pumpkin travels 9.5m horizontally before it hits the ground.
Answer:
The pumpkin's vertical displacement is H=27.76m
The pumpkin's vertical velocity when it hits the ground is v=23.32m/s
Explanation:
x=v*t
9.5=4*t
t=2.38s
H=vi(t)+1/2at^2
H=1/2at^2
H=1/2(9.8)(2.38)^2=27.76
vf=vi+at
vf=2.38(9.8)
vf=23.32m/s
what type of kinetic energy does flowing water have?
-rotational
-vibrational
-translational
-chemical
Answer:
none it's Hydroelectric energy
turns into _____ energy (when plants convert into food)
Answer:
the answer is PHOTOSYNTHESIS..
Explanation:
photosynthesis is the process when plants make their food from taking energy from the sun creating sugar.
describe the relationship between the direction of the velocity vector and the direction of the acceleration for a body moving in a circle at coinstant speed
Answer:
a = v²/r
Explanation:
The acceleration of a body moving in a circular path is known as the centripetal acceleration. This is the acceleration of a body that keeps the body within the circular path. It is written in terms of the linear velocity v and the radius of the circle of rotation as shown;
a = v²/r where
v is the linear velocity
r is the radius
a is the centripetal acceleration
how do magnetic keepers stop demagnetization
Answer:
Keepers also have a useful safety function, as they stop external metal being attracted to the magnet. ... A keeper for low-coercivity magnets is just a strong permanent magnet that keeps all the domains pointing the same way and realigns those that may have gone astray.
Why is this event important to include in the biography?
It shows that Frida Kahlo got whatever she asked from her parents.
It shows that Frida Kahlo was vain and liked looking in the mirror.
It shows that Frida Kahlo liked to share things with her father.
It shows that Frida Kahlo used art to cope with her pain.
Answer:
D: It shows that Frida Kahlo used art to cope with her pain.
Explanation:
Within the text given it shows her emotions being lonely, immobile and in pain. But it all shows her asking her father for art which states that art is her sort of relief and happy place.
Answer:
It shows that Frida Kahlo used art to cope with her pain.
Explanation:
A 0.950 kg block is attached to a spring with spring constant 16 N/m . While the block is sitting at rest, a student hits it with a hammer and almost instantaneously gives it a speed of 49 cm/s. What are:________
a. The amplitude of the subsequent oscillations?
b. The block's speed at the point where x=1/2A
Answer:
A)0.1m
B)vf= 35cm/s
Explanation:
Problem 7:esvoe71017425b601f756a59bc7b76d2f39502730941492c25f1dd66c7ed01e4bb38ceovse 0N86-C1-52-40-A837-22820 If object A is twice the mass of object B what can be said about their kinetic energies just as they hit the ground
Answer:
the kinetic energy of A will be twice that of B
Explanation:
The formula for calculating kinetic energy is expressed using the formula
KE = 1/2mv²
m is the mass of the object
v is the velocity
For object A:
KEA = 1/2mAvA²
For object B:
KEB = 1/2mBvB² ... 1
If object A is twice the mass of object B, then mA = 2mB
From 1:
KEA = 1/2mAvA²
Substitute mA = 2mB
KEA = 1/2(2mB)vA² .... 2
Divide 1 by 2
KEB/KEA = 1/2mBvB²/mBvA²
KEB/KEA = 1/2vB²/vA²
Assuming they have the same velocities then vA ,= VB
The equation becomes:
KEB/KEA = 1/2vB²/vA²
KEB/KEA = 1/2vB²/vB²
KEB/KEA = 1/2
KEA = 2EB
Hence the kinetic energy of A will be twice that of B
Help me and get points
What is the correct answer
PLEASE HELP its due today
On a flat field, a ball is kicked and given an initial velocity of 28 m/s at an angle of 20 degrees above the horizontal.
a) What are the x and y components of the ball’s initial velocity?
b)From the moment it is kicked, how long will it take for the ball to reach its maximum height?
c)What is the maximum height of the ball?
d) Find the horizontal distance between the point at which the ball was kicked and the point where it lands.
Answer:
1. far
2. a couple of seconds
3. a mile or so
Explanation:
what is the secret of a delightful pastry
Answer:
✨ love ✨
words words words words words words words words words words words
Answer:
butter
Explanation:
Why does the transition of light waves from water to air make it seem as if fish and other things in a pond are shallower than they actually are?
Answer:
When light gets in contact with water, it emerges into the air, and then it speeds up, which makes it look shallower than it actually is.
Explanation:
Answer:
Refraction
Explanation:
Light rays reflected from the fish are refracted at the surface of the water, but the eyes and brain trace the light rays back into the water as thought they had not refracted, but traveled away from the fish in a straight line. This effect creates a "virtual" image of the fish that appears at a shallower depth.
What is Intracellular communication
Answer:
Intercellular communication refers to the communication between cells. Membrane vesicle trafficking has an important role in intercellular communications in humans and animals, e.g., in synaptic transmission, hormone secretion via vesicular exocytosis.
If a force does a negative amount of work on an object, does the object's speed increase, decrease, or remain the same? Justify your answer.
Answer:
if a force does a negative amount of work on an object ,so the speed of the object got decrease ,because the acceleration becomes negative so if the acceleration becomes negative so the speed is decreased.
Explanation:
A sports car accelerates from 0 to 25 meters per second in 4 seconds. What is its acceleration?
Question 1 options:
10ms2
6.25 ms2
25ms
0ms
20pts
Answer:
6.25 ms²
Explanation:
..................
An electromagnetic wave of wavelength 435 nm is traveling in vacuum in the —z direction. The electric field has an amplitude of 2.70 x 10^-3 V/m and is parallel to the x axis. What are the frequency and the magnetic-field amplitude of this wave? In calculating the amplitude of the magnetic field, you divide the electric-field amplitude by the speed of light, which requires you to convert some units. Which of the following is equivalent to 1 T?
a. 1 (N/A.m)
b. 1 (N/c.m)
c. 1 (N.s/C.m)
d. 1 (V.s/m^2)
Answer:
a) 6.9*10^14 Hz
b) 9*10^-12 T
Explanation:
Given that
The wavelength of the wave, λ = 435 nm
Amplitude of the electric field, E(max) = 2.7*10^-3 V/m
a)
The frequency of the wave can be found by using the formula
c = fλ, where c = speed of light
f = c/λ
f = 3*10^8 / 435*10^-9
f = 6.90*10^14 Hz
b)
E(max) = B(max) * c, magnetic field amplitude, B(max) =
B(max) = E(max)/c
B(max) = 2.7*10^-3 / 3*10^8
B(max) = 9*10^-12 T
c)
1T = 1 (V.s/m^2)
Calculate the potential energy of a 60 kg student sitting in the top row of the bleachers, which are 4 meters from the ground.
Answer:
2400 JExplanation:
The potential energy of a body can be found by using the formula
PE = mgh
where
m is the mass
h is the height
g is the acceleration due to gravity which is 10 m/s²
From the question we have
PE = 60 × 10 × 4
We have the final answer as
2400 JHope this helps you
What is the velocity of the boat if the passenger shoots at an angle 60 with horizontal ? The mass of boat with the passenger is 100 kg ,mass of the bullet is 35g and its velocity is 400 m/s. <3
Answer:
400cos(60) = 200m/s
100(v) = 0.035(200)
v= 0.07m/s
what is simple machine? write any four advantages if it
Answer: See explanation
Explanation:
Simple machine is a machine that has few moving parts or may also have no moving parts and they are usually used to make ones work easier. Examples include wheel and axle, wedge, pulley, lever, screw or an inclined plane.
Their advantages include:
• Less energy is required to perform a particular work.
• It makes work easier.
• It makes work faster.
• Simple machine enable one to do things that might have been difficult to achieve or do.
Focusing on irelevant information can negatively impact the ability to reason and problem solve effectively.
Answer:
true
Explanation:
I would like to know why this is the correct answer.
-The same net force is applied to two bodies. The first body acquires half of the acceleration of the second body. What is the relationship between the masses of the bodies?
*The mass of the first body is double the mass of the second body
Answer:
The mass of first body is double, since mass is double.
This is due to momentum
The same net force is applied to two bodies. The first body acquires half of the acceleration of the second body. The mass of first body is double, since mass is double.
What is momentum?In Newtonian physics, an object's mass and velocity are combined to form momentum, more precisely linear momentum and translational momentum. It has both a magnitude as well as a trajectory, making it a vector quantity. If an item has a mass of m and a velocity of v (also a vector quantity).
The kilogram metre per second (kg m/s), or newton-second inside the International System of Units (SI), is the unit used to measure momentum. The same net force is applied to two bodies. The first body acquires half of the acceleration of the second body. The mass of first body is double, since mass is double.
Therefore, the mass of first body is double, since mass is double.
To know more about momentum, here:
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