Answers
Unbalanced
Balanced
Balanced (I think)
Related Questions
Why does the time for 20 complete oscillations need to be taken in the pendulum oscillation experiment?
Answers
Answer:
In order to minimize the uncertainty in the period, we measured the time for the pendulum to make 20 oscillations, and divided that time by 20
Explanation:
Describe the buoyant force acting on the Lucia before the torpedo attack.
Answers
Answer:
Explanation: positive
Suppose you bake a potato in a toaster oven that uses 1.2 kW. The oven is turned on for 25 minutes. How many kilowatt hours did it use?
Answers
Answer:
0.3kilowatts hours
Explanation:
If you bake a potato in a toaster oven that uses 1.2 kW and oven turned on for 25minutes, to get the amount in kilowatt hour, we will need to convert minutes to hour first
60minutes = 1hr
25minutes = x
60x = 25
x = 25/60 hr
x =
Multiply the time in hr with the power
Amount of kWhr used = 1.2 * 25/60
Amount of kWhr used = 30/60
Amount of kWhr used = 0.3kilowatts hours
Hence it used 0.3kilowatts hours
Which of the following is NOT a function of the skeletal system?
A. Support your body
B. Give shape to your body
C. Bring oxygen to your body
D. Protect your body
Answers
Hope this helps
And
A man pushed the box with a force of 20 N. He doubled his force to 40 N. The box did not
change. Which option best describes the acceleration of the box after the force was doubled?
a) Acceleration is 2x the original acceleration
b) Acceleration is 4x the original acceleration
c) Acceleration is 1/2x the original acceleration
d) Acceleration is 1/4x the original acceleration
Answers
Answer:
A
Explanation:
if the man doubles his force to 40 and the box was yet to move that means acceleration also doubled so your answer would be A
A merry-go-round accelerating uniformly from rest achieves itsoperating speed of 2.5rpm in five revolution.
A) What is the magnitude of its angluar acceleration(rad/s^2)?
B) How many seconds does it take the merry-go-round to reachits operating speed?
Answers
Answer:
(A) The magnitude of its angular acceleration 1.09 x 10⁻³ rad/s²
(B) Time of motion 240.2 s
Explanation:
Given;
final angular speed, ωf = 2.5 RPM
angular distance, θ = 5 rev = 5 x 2π = 10π rad
initial angular speed, ωi = 0
final angular speed in rad/s;
[tex]\omega_f = \frac{2.5 \ rev}{min} \times \ \frac{2\pi}{1 \ rev} \times \ \frac{1 \min}{60 s} = 0.2618 \ rad/s \\[/tex]
(A) the magnitude of its angular acceleration(rad/s^2);
[tex]\omega_f^2 = \omega_i^2 + 2\alpha \theta\\\\(0.2618)^2 = 0 + (2\times 10\pi)\alpha\\\\0.0685 = 20\pi \alpha\\\\\alpha = \frac{0.0685}{20\pi} \\\\\alpha = 1.09\times 10^{-3} \ rad/s^2[/tex]
(B) Time of motion;
[tex]\omega_f = \omega_i + \alpha t\\\\0.2618 = 0 + 1.09\times 10^{-3} t\\\\t = \frac{0.2618}{1.09\times 10^{-3}} \\\\t = 240.2 \ s[/tex]
If too much energy is given to an electron that is above the threshold
frequency what happens to the extra energy?
Answers
Answer:
The electron gives up It's extra energy in a form called "photon light" and falls back down to its normal energy level
Explanation:
this is the measured value (always positive) from one point to another
Answers
Answer:
Distance.
Explanation:
Motion can be defined as a change in the location (position) of a physical object or body with respect to a reference point i.e the amount of distance covered by the physical object.
This ultimately implies that, motion would occur as a result of a change in location (position) of an object with respect to a reference point or frame of reference i.e where it was standing before the effect of an external force.
Mathematically, the motion of an object is described in terms of acceleration, time, distance, speed, velocity, displacement, position, etc.
Hence, distance is the measured value (always positive) from one point to another.
Mathematically, distance is given by the formula;
Distance = speed * time
Also, the S.I unit for measuring the distance covered by a physical object is meters.
if a truck driver is driving at 30 mph and she makes a U-turn, then starts driving at 30 mph in the opposite direction, did the driver's speed or velocity change after changing direction? Why?
PLEASE THE QUIZ IS DUE IN A BIT :(
Answers
The velocity of the truck changed after changing direction because, velocity is a vector quantity.
What is meant by velocity ?Velocity of an object is defined as the rate of change of displacement of the object.
Here,
The the truck driver was driving at 30 mph and when she makes a U-turn, she starts driving at 30 mph in the opposite direction.
The quantity that changed during this change in direction is its velocity.
The speed of the truck will not change due to the change in direction because, speed is a scalar quantity.
But the velocity of the truck is changed due to the change in direction because, the velocity is a vector quantity.
A vector quantity is a quantity that has both magnitude and direction.
Hence,
The velocity of the truck changed after changing direction because, velocity is a vector quantity.
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A jet play sits on the runway and then rapidly accelerates does it go to potential to kinetic energy?
Answers
According to the article, why might acting happy actually make one happy?
Answers
Answer: mirror neurons are the reason people usually reflect the behavior of those around them and have been linked to the ability to empathize. People are attracted to happy people because it seems to boost our mood.
Explanation:
Answer:
Some psychologists think that you can trick your brain into feeling happy by acting happy. Acting happy might actually make one happy by mirror neurons. This is the reason people usually reflect the behavior of those around them and have been linked to the ability to empathize. People are attracted to happy people because it seems to boost our mood. The three components of emotion are cognitive, physiological, and behavioral. There is actually some scientific evidence to suggest that smiling, even when you are not feeling happy, can make you happy. This idea is called the facial feedback hypothesis. Happiness, and smiling, can also be contagious and make others around them want to smile. People often mimic the facial expressions of others.
Explanation:
100% on Edge 2023!! You're welcome :) :) :) :)
Question 8 of 10
When you see your reflection in a flat (plane) mirror, what type of image are
you seeing?
A. Smaller
B. Virtual
C. Larger
D. Real
Answers
Answer:
virtual
Explanation:
because the light rays do not meet at the image position
the other options are definitely wrong because
characteristics of a plane mirror images are that,
it is the same size as the object
it is upright
Answer:
B - Virtual
Explanation:
Shine the flashlight on the liquid crystal sheet. Did you observe evidence that light carries energy?
Answers
Answer:
no i did not observe anything
Explanation:
A net force of 30 N is applied to an object, causing it to accelerate at 20m/s^2. What is the mass of the object?
Answers
Answer:
mass of that object is = 30 × 29 = 870N
Please hurry please
What is the height of the counter where a 4 kg fruit basket sits that has 30 J of gravitational potential energy? h= GPE/am
Answers
Answer:
0.765m
Explanation:
gravitational potential energy GPE = mass * acceleration due to gravity * height
Given
GPE = 30Joules
Mass m = 4kg
acceleration = 9.8m/s²
Required
Height h
From the formula
h = GPE/mg
h = 30/4(9.8)
h = 30/39.2
h = 0.765m\
Hence the height of the counter is 0.765m
PLS, THIS IS URGENT!! Read the following passage that explains the image you examined at the beginning of the lesson in order to answer the following question. Why is it important to have a range of tools that can measure all parts of the electromagnetic spectrum?
I would give the BRAINLIEST for the best answers!!!
Answers
Answer:
It is important to have a range of tools that can measure all parts of the electromagnetic spectrum because electromagnetic spectrum have different radiations such as infrared, visible light, ultraviolet, radio waves, microwaves, X-rays and gamma rays. Each of these radiation requires different instrument for their measurement. So that's why a range of tools are needed to measure electromagnetic spectrum.
a speed swimmer love to race around the parks pine which is 25m around if she can swim 20 laps in 7200s what is her average speed?
Answers
Answer:
the average speed of the swimmer is 0.069 m/s.
Explanation:
Given;
complete distance around the park pine, d = 25 m
total lap completed, = 20 laps
time of laps completion, t = 7200 s
The total distance completed by the swimmer = 20 x 25 = 500 m
The average speed of the swimmer = distance / time
= (500 m) / (7200 s)
= 0.069 m/s.
Therefore, the average speed of the swimmer is 0.069 m/s.
A shopping cart with two nice kids, rolls off a horizontal roof ledge that is 50
meters high. The cart and nice kids land 30 meters from the base of the ledge.
How fast was the cart rolling when it left the ledge?
Answers
Answer:
9.39 m/s
Explanation:
Using the y-direction, we can solve for the time t it takes for the cart to reach the ground.
Assume the up direction is positive and the down direction is negative.
v₀ = 0 m/sa = -9.8 m/s² Δy = -50 m t = ?Find the constant acceleration equation that contains these four variables.
Δy = v₀t + 1/2at²Substitute known values into this equation.
-50 = (0)t + 1/2(-9.8)t²Multiply and simplify.
-50 = -4.9t²Divide both sides of the equation by -4.9.
10.20408163 = t²Square root both sides of the equation.
t = 3.194382825Now we can use this time t and solve for v₀ in the x-direction. Time is most often our link between vertical and horizontal components of projectile motion.
List out known variables in the x-direction.
v₀ = ?t = 3.194382825 s a = 0 m/s²Δx = 30 mFind the constant acceleration equation that contains these four variables.
Δx = v₀t + 1/2at²Substitute known values into the equation.
30 = (v₀ · 3.194382825) + 1/2(0)(3.194382825)²Multiply and simplify.
30 = v₀ · 3.194382825Divide both sides of the equation by 3.194382825.
v₀ = 9.391485505The cart was rolling at a velocity of 9.39 m/s (initial velocity) when it left the ledge.
Answer:
9.39 m/s
Explanation:
Using the y-direction, we can solve for the time t it takes for the cart to reach the ground.
Assume the up direction is positive and the down direction is negative.
v₀ = 0 m/s
a = -9.8 m/s²
Δy = -50 m
t = ?
Find the constant acceleration equation that contains these four variables.
Δy = v₀t + 1/2at²
Substitute known values into this equation.
-50 = (0)t + 1/2(-9.8)t²
Multiply and simplify.
-50 = -4.9t²
Divide both sides of the equation by -4.9.
10.20408163 = t²
Square root both sides of the equation.
t = 3.194382825
Now we can use this time t and solve for v₀ in the x-direction. Time is most often our link between vertical and horizontal components of projectile motion.
List out known variables in the x-direction.
v₀ = ?
t = 3.194382825 s
a = 0 m/s²
Δx = 30 m
Find the constant acceleration equation that contains these four variables.
Δx = v₀t + 1/2at²
Substitute known values into the equation.
30 = (v₀ · 3.194382825) + 1/2(0)(3.194382825)²
Multiply and simplify.
30 = v₀ · 3.194382825
Divide both sides of the equation by 3.194382825.
v₀ = 9.391485505
The cart was rolling at a velocity of 9.39 m/s (initial velocity) when it left the ledge.
(Conservation of Momentum)
Consider a 2,000 kg car traveling 10 m/s toward another car.After the two cars collide, they couple together and move along at 6 m/s. What is the mass of the second car?
Can someone please solve and explain,I don’t understand:/
Answers
Answer:
I haven't learnt physics at all yet but I'll try.
After the two cars collide, they move at 6 m/s.
This tells us that the 2nd car which collided with the first car which is 2000 kg is much heavier than the 1st one, if the second one was lighter, the two cars coupled together speed would be much more than just 6 m/s.
Refer to explanation for working.
Explanation:
Now find out how much g or kg is the 2nd car more than the 1st.
2000 ÷ 10 = 200 (I don't really know how to explain this part)
10 - 6 = 4 (Difference for 1st car average speed per second and the coupled cars average speed per second)
200 x 4 = 800
2000 + 800 = 2800 kg
(Final answer)
Gravitational force acts on all objects in proportion to their masses. Why then, a heavy object does not fall faster than a light object?
Answers
Answer:
Well, it's because the air offers much greater resistance to the falling motion of the feather than it does to the brick. ... Galileo discovered that objects that are more dense, or have more mass, fall at a faster rate than less dense objects, due to this air resistance. A feather and brick dropped together.
Explanation:
A steam governor uses negative feedback to control the speed of a steam engine. Suppose a steam governor has two balls that are each rotating with a tangential speed of 3.7 m/s. The balls are 0.10 m from the rotation axis, and the centripetal force on each ball is 670 N. What is the mass of one of the balls? Pls help
Answers
Answer:
no lo se
Explanation:
Supposing a steam governor has two balls that are each rotating with a tangential speed of 3.7 m/s. The balls are 0.10 m from the rotation axis, and the centripetal force on each ball is 670 N. Then the mass of one of the balls is 4.89 kg.
What is Centripetal force ?''Centripetal force is force acting on a body performing circular motion, which is along radius of the circle and directed towards the center of circle"
since centripetal force acts at right angle to the tangential velocity of the body, there is no displacement in the direction of the force, hence no work done. It has newton(N) as Si unit.
centripetal force is given by,
F= mv²÷r
Where m is mass of the body
v is velocity of the body
r is radius of circle at which body is moving.
Given
velocity v = 3.7 m/s
radius r = 0.10 m
centripetal force F = 670N
mass = ?
from formula we can write,
670 = m(3.7)²÷0.10
m= (670×0.10)÷(3.7)²
m = 4.89 kg
Hence mass of one of the balls is 4.89 kg
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A bicycle is 10 m from a wall traveling at a rate of 4 m/s. How far from the wall will it be if it accelerates at a rate of 12 (m/s)/s for 8 seconds
Answers
The bicycle is a distance x away from the wall at time t according to
x = 10 m + (4 m/s) t + 1/2 (12 m/s²) t ²
so that after t = 8 s, it will be
x = 10 m + (4 m/s) (8 s) + 1/2 (12 m/s²) (8 s)² = 426 m
away from the wall.
how can we prove an object is moving? a) Compare it to another object. b) Measure it's change in position. c) Identify it's location. d) There is no way to measure motion
Answers
Answer:
B
Explanation:
The object won't stay in the same place if its moving
Explanation:
B) Measure it's change in position.
A man pushes against a tree with a force of 10 newtons (N). The tree does not move. What is the amount of force exerted
by the tree on the man?
ON
BSN
10 N
20 N
Answers
Answer:
10 N
Explanation:
Given that,
A man pushes against a tree with a force of 10 newtons.
We need to find the amount of force exerted by the tree on the man.
The force exerted by the tree on the man will be equal to the force that the man exert on the tree as per Newton's third law of motion.
It means the tree exert 10 N force on the man. Hence, the correct option is (c) i.e. 10 N.
Which statement best compares a scientific theory and an opinion?
O A. Neither an opinion nor a scientific theory can ever be changed.
O B. An opinion is supported by evidence, while a scientific theory often is not supported by evidence.
OC. A scientific theory is supported by evidence, while an opinion often is not supported by evidence.
OD A scientific theory can never be changed, while an opinion can change in many ways.
Im
Answers
Answer: c opinion is something ppl just suggest but a theory needs proof before it is confirmed
Do different types of electromagnetic waves travel at different speeds?
Answers
No.
Radio, TV, microwave, heat, red, yellow, blue, tanning rays, X-rays, and gamma rays all travel at the same speed. It's called the "speed of light".
(As long as they're all traveling through the same stuff.)
3. If the net work done on an object is negative, then the object's kinetic energy
a. decreases.
b. remains the same.
c. increases.
d. is zero.
Answers
Answer:
I think the answer is B I hope this helps also Im sorry If I'm wrong
Someone is traveling from Houston, TX to Dallas, TX. It takes 4 hours to make the 224mile trip. What is his velocity?
Answers
If 59.1 g of pure metal uses 890.9 j of energy to heat it from 26.1 c to 59.6 c, identify the metal
Answers
Answer: The metal is iron.
Explanation:
We have 59.1 grams of a given metal.
We need 890.9 joules of energy to heat the metal from 26.1°C to 59.6°C
First, we need to see the net increase in temperature, which is equal to the difference between the final temperature and the initial temperature.
ΔT = 59.6°C - 26.1°C = 33.5°C
Now we can find the specific heat, which is calculated as:
c = Ε/(ΔT*m)
Where:
E = energy given to the material = 890.9 J
m = mass of the material = 59.1 gr
ΔT = change in temperature = 33.5°C
Replacing these in the above equation we get:
c = 890.9 J/(33.5°C*59.1 gr) = 0.45 J/(gr*°C)
Now we need to look at a table of specific heats and see which metal has this specific heat.
We can see that iron is the best match, so we can assume that the metal is iron.
Which part of the following graph shows the object going at the fastest speed?
Distance
5
4-
in km
2-
1-
A А
0
6 5 10 15 20 25 30 35 40 45
Time in minutes
O Ato B
B to C
C to D
A to B and C to D are going equal speeds
Answers
Answer:
more point plzzzzz... eeeeeeeee
A to B in the graph shows the object going at the fastest speed.
In a distance-time graph, the gradient of the line is equal to the speed of the object. The greater the gradient (and the steeper the line) the faster the object is moving.
What is speed ?"The rate of change of position of an object in any direction. Speed is measured as the ratio of distance to the time in which the distance was covered. Speed is a scalar quantity as it has only direction and no magnitude."
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