Answer:
I believe the answer is B
HELP ASAP TIMER
Your younger brother gets a new toy car as a present. He winds up the toy, puts it on the ground and watches it accelerate for 5 seconds. You can explain how to find the net force acting on the toy car for the 5 seconds while accelerating by the following:
a
Use a meterstick and stopwatch to measure the distance the car travels for the 5s.
b
Use a balance to determine the mass of the car. Use a motion sensor to measure the speed of the car at a time of 0s and at time of 5s .
c
Use a balance to determine the mass of the car. Use a meterstick to measure the distance the car travels for the 5s .
d
Use a motion sensor to measure the speed of the car at a time of 0s and a time of 5s . Use a meterstick to determine the distance the car travels for 5s .
Answer:
b Use a balance to determine the mass of the car. Use a motion sensor to measure the speed of the car at a time of 0s and at time of 5s .
Explanation:
The right way to measure the net force on the car is take the measurement of its mass then find the speed of the car within the time 0s to 5s.
This is because the net force acting on car is given as;
Force = mass x acceleration
By using the balance, the mass is determine
Acceleration is the rate of change of velocity with time.
Acceleration = [tex]\frac{v - u}{t}[/tex]
v is the final velocity
u is the initial velocity
t is the time taken
Now,
Force = mass x [tex]\frac{v - u}{t}[/tex]
new stars form from ?
If an object is moving at a constant velocity, it means that?
What decibel level can cause hearing damage to begin
Answer: Noise above 70 dB can cause hearing damage
Explanation:
Answer:
The decibel level that starts to have hearing damage is 120 dB.
Explanation:
Help please!!!
if superman at 90kg jumps a 40m building in a single bound how much work does superman perform
Answer:
5 years worth of work (aka all of the homework i currently have)
PLEASEEEEE HELLLLLPPPPPPP
Answer:
A or B(the answers)
Explanation:
they seem like the most right
Answer:
I'm pretty sure it's b
Explanation:
help it's for my civics class
ANSWER: D. Rule of Law
is the answer
d. rule of law
rule of law .
How to find acceleration?
Answer:
a=(v-u)/t is how you find acceleration.
List 5 occasions in real life when you want friction (motion to stop)
Answer:
*want my husband's mouth to stop moving
*when im driving my car and the light turns red
*i want the person pushing the buggy behind me to stop when I stop
*when I'm on the 16th floor at the Horseshoe Casino Hotel and the elevator keeps passing my floor... would love for it to stop and pick me up
*when Publisher's Clearing House is delivering my big fat check, I definitely want them to stop and hand it over:)
What are all stars made of
How many significant figures in 0.00850
Answer:
5
Explanation:
A pulse with a height of 20 cm and a length of 30 cm travels with a speed of 400 cm/s through a spring that has been stretched so it is 800 cm long. If we want to send another pulse through the spring that will have a different speed, which of the bolded words should we change? List all that will change the speed of the wave.
Answer:
To send a pulse of different speed, change the tension or stretch on the spring
Explanation:
A pulse is a single disturbance of a particle is a medium. The pulse has an amplitude or and a pulse length in the medium. The speed of the pulse is dependent on the amount of strain or tension ( stretch) applied to the medium. The speed also determines the length of the pulse but is unaffected by the or amplitude of the pulse.
What is the force of gravity between two objects that are 4.0 m apart? The mass of the first object is 0.25 kg and the mass of the second object is 0.65 kg
Answer:
6.77 x 10^-13 Newtons
Explanation:
using the formula [tex]F= \frac{GMm}{r^2}[/tex]
where G is the gravitation constant which is 6.673 x 10^-11 N m2/kg2
M = mass of the first object which is 0.25 kg
m = mass of the second object which is 0.65 kg
and r is the distance between the objects which is 4 metres
Plugging our values in:
[tex]F\:=\:\left(6.673x10^{-11}\right)\frac{\left(0.25\right)\left(0.65\right)}{4^2}[/tex]
F = 6.77 x 10^-13 N
how many pixels would image contain if it's Dimension are 400 x 200 pixels
Answer:
800 pixels
Explanation:
400*200=800
1.) Describe the shape, movement of particles, and the volume of a solid.
2.) Describe the shape. movement of particles, and the volume of a liquid.
30 points please help me ??? ASAP
Answer:
Solids have a definite shape and volume, its particles vibrate slowly.
Liquids have no definite shape, the particles move randomly around its container, and they have a fixed volume.
help me help me please please, please
How do ions help your brain?
A child on the high dive has a mass of 40 kilograms. If the high dive is 10 meters in the air, what is the potential energy?
options-
1. 400 joules
2. 3920 joules
3. 4 joules
Which two forces act over very small distances
Explanation:
There are three fundamental forces that act at a distance. They are gravitational, electromagnetic and nuclear forces.
hope it helps!
What is the weight of the body under the influence of a force of 10N reaches a speed of 1.5 m / s in 3s?
Answer:
Explanation:
F=ma
F=10N
A=v-u upon t
=1.5-0 upon 3
=0.5m per second squared
Then do force divided by. Accelaration and multiply by gravity.
If the atomic weight- # of protons = # of neutrons, then how many neutrons does neon have?
Answer:
atomic weight 20.180
protons 10
neutrons 2,8
Explanation:
What are the names of the ions?
Answer:
Well for most of them you add -ide
Explanation:
Answer:
Here is your answer
hope it helps you
A 35kg cannonball sits at rest on a flat level surface. What is the normal force exerted on the cannon ball. Use -9.8 m/s2 for acceleration due to gravity.
A. -343N
B. 44.8N
C. 25.2N
D. 343N
Answer:
a) N = 343 [N]
Explanation:
We must remember Newton's third law, which tells us that the force acting on a body is equal to the normal reaction force of equal magnitude but acting in the opposite direction.
[tex]N=m*g[/tex]
where:
m = mass = 35 [kg]
g = gravity acceleration = 9.81 [m/s²]
[tex]N = 35*9.8\\N= 343 [N][/tex]
Write two forms of mechanical energy
To balance the forces on the box what direction must you push?
1- Right
2- Left
3- Down
4- Up
The surface of the Earth changes from processe such as erosion. Which of these changes to Earth's surface is an example of erosion? A. an active volcano starting to erupt B. a rock turning a red color from oxygen C. a waterfall breaking the rocks below it D. the wind picking up dust and carrying it
Answer:
D. the wind picking up dust and carrying it
Explanation:
Erosion is a process in which an agent transfer the top soil to another region, thereby exposing the lower soil. These agents have the ability to move the top layer of soil and deposit it at another place. The major agents in this case are; a running or flowing body of water and wind.
Therefore, the change to the Earth's surface that is an example of erosion is the wind picking up dust and carrying it. Thereby exposing the lower layers.
Light that enters your eye strikes cells in the back of your eye
true
False
Answer: True
Explanation: Light enters your eye through the lens which then hits the retina which is located in the back of your eye.
Which three characteristics do mechanical waves and electrocmagnetic
waves share?
A. The waves begin with a disturbance.
O B. The waves transfer energy from its source.
C. The waves and their energy move outward from the source.
D. The waves and their energy can travel through empty space.
Answer:
It is A, B, and C
Explanation:
I just took the test!
The three characteristics mechanical waves and electromagnetic waves share are:
A. The waves begin with a disturbance.
B. The waves transfer energy from its source.
C. The waves and their energy move outward from the source.
What are mechanical waves and electromagnetic waves?Usually, waves transfer energy from one place to another. Mechanical waves transfers via matter where as electromagnetic waves transfers via light. Both mechanical waves and electromagnet (light) waves measured through amplitude, wavelength, frequency and both will get transmitted, refracted, reflected, absorbed, diffracted when they react with matter. Both the electromagnetic waves and mechanical waves are transverse in nature but the mechanical waves can also be in longitudinal.
So, many characteristics were similar for mechanical waves and electromagnetic waves.
Hence, Option A, B, C are the three characteristics.
Learn more about the waves,
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what is the kinetic energy of a 1 kilogram ball thrown into the air with an initial velocity of 30 m/s
Explanation:
KE = 1/2 MV ^2
KE = 1/2 * 1 * 30 ^2
KE= 1/2 * 1 * 900
KE = 450 kg m^2/ s^2
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Answer:
the above pic will help
I have done it in word
I hope it helps mate
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I will always help you understanding your assingments
have a great day
#Captainpower:)
Which of the following situations has more kinetic energy than potential energy?
a rock at the edge of a cliff
an archer’s bow that is drawn back
a rolling bowling ball
a car waiting at a red light
Answer:
C. a rolling bowling ball
I just answered this question on my quiz.