Answer:
A helium balloon
Explanation:
not sure btw
Write four factors that affect the speed of sound
in a
gas medium.
Answer:
(a) Effect of pressure :
(a) Effect of pressure :(b) Effect of temperature :
(a) Effect of pressure :(b) Effect of temperature :(c) Effect of density :
(a) Effect of pressure :(b) Effect of temperature :(c) Effect of density :(d) Effect of moisture (humidity):
(a) Effect of pressure :(b) Effect of temperature :(c) Effect of density :(d) Effect of moisture (humidity):(e) Effect of wind:
Explanation:
I HOPE THIS HELPS YOU♡♧Definition of molecular machine
After a recent snow storm, you decide to sled down a hill in Fairmount Park. You take a running start and hit the slope with an initial velocity of 4.9 m/s. You then begin to accelerate at 4.2 m/s^2 for 4.7 seconds. How many meters will you travel in that time?
Here's what you need to know below:
Answer:
69.42 m
Explanation:
From the question given above, the following data were obtained:
Initial velocity (vᵢ ) = 4.9 m/s
Acceleration (a) = 4.2 m/s²
Time (t) = 4.7 s
Displacement (Δx) =?
Thus, we can obtain the displacement by using the following formula:
Δx = vᵢt + ½at²
Δx = (4.9 × 4.7) + (½ × 4.2 × 4.7²)
Δx = 23.03 + (2.1 × 22.09)
Δx = 23.03 + 46.389
Δx = 69.419 ≈ 69.42 m
Thus, the distance travelled is 69.42 m
A lion with a mass of 190 kg is chasing a gazelle with a mass of 15 kg. The distance between the lion and the gazelle is 2 meters. a. How much gravitational force does the lion exert on the gazelle? b. How much gravitational force does the gazelle exert on the lion?
Answer:
Explanation:
with a mass of 190 kg is chasing a gazelle with a mass of 15 kg. the distance between the lion and the gazelle is 2 meters. how much gravitational force does the lion exert on the gazelle? ... In which figure is de bc ? a. figure 1 b. figure 2 c. figure 3 d. figure 4... Mathematics 3 21.06.2019 15:00.
An object starts from rest and accelerates uniformly down an incline. If the object reaches a speed of 40 meters per second in 5 seconds, its average speed is
Answer:
20 m/s
Explanation:
Step 1
Find the acceleration
We calculate the acceleration of the vehicle travelled
= Speed/Time
Initial speed = 40 m/s
Tims = 5 seconds
Acceleration = 40m/s/ 5s
Acceleration = 8 m/s²
Step 2
Find the distance travelled
Distance travelled = 1/2 × a × t²
= 1/2 × 8 m/s² × 5²
= 100 meters
Step 3
Find the average speed
The average speed = Distance/time
= 100 meters/5 seconds
= 20 meters per second (m/s)
The average speed is 20 m/s.
Lets move step by step:
Step 1 : Find the acceleration
We calculate the acceleration of the vehicle travelled by using the given formula.
Acceleration= Speed/Time
Given:
Initial speed = 40 m/s
Time = 5 seconds
Acceleration = [tex]\frac{40m/s}{ 5s} =8 m/s^2[/tex]
Acceleration = 8 m/s²
Step 2 :Find the distance travelled
[tex]\text{Distance travelled}=\frac{1}{2} * a * t^2\\\\=\frac{1}{2} * 8 m/s^2 * 5^2=100 m[/tex]
Distance= 100 meters
Step 3 :Find the average speed
Average speed = Distance/time
= [tex]\frac{100 meters}{5 seconds} =20m/s[/tex]
Average speed= 20 m/s
Learn more:
brainly.com/question/10307723
If the total energy of a system is 2000J, and the kinetic energy is 500J, what does the potential energy in the system have to be?
Answer:
Potential energy in the system = 1,500 J
Explanation:
Given:
Total energy of a system = 2,000 J
Kinetic energy = 500 J
Find:
Potential energy in the system
Computation:
Total energy of a system = Kinetic energy + Potential energy
2,000 J = 500 J + Potential energy in the system
Potential energy in the system = 1,500 J
are zebra fish schooling fish?
Answer:
they r schooling fish
Explanation:
they need to be kept in groups of 5.
Answer:
yes thwy are schooling fish
Which acid is naturally found in foods and can be safe to eat?
Answer:
Citric
Explanation:
Citric and acetic acids are naturally found in foods and can be safe to eat.
Answer:
citrus
Explanation:
i think i am sure
HELPPPPPPPPPPPPPPPPPPPPPPPPPP
Answer:
C
Explanation:
through the desk....here desk is the student's medium to hear the sound. its oblivious because when he lifts his head away from the desk he hears nothing else
we know if we apply the force along the left, friction acts along the right and vice versa.But what about an object which is not moving but at rest on a surface?
Answer:
Explanation below
Explanation:
Friction Force
When two objects are in contact, the surface between them exerts a frictional force as long as the objects are tried to move with respect to each other.
If a given external force is applied to the left, then a friction force appears to the right and opposes the intent to move them. A similar situation occurs when the force is applied to the right side.
If the object is at rest and no force is applied, no friction force appears.
It's important to recall that two different friction forces are defined: the kinetic friction force and the static friction force, usually the latter is greater than the first.
6. An elevator takes 33k) of energy to lift a group of people up 6 m. What is the total mass of
the group of people when the elevator's mass is 200 kg?
Answer:
350 Kg
Explanation:
We use the Work Formula:
W = Force . Distance
33.000 Joules = Force . 6
Force = 5500 Newtons
Force = Mass . Acceleration
5500 = Mass . 10
Mass = 550
550 - 200 = 350 Kg
why do cars stay in motion
Answer:
cars stay in motion because its normal for objects to keep. doing what they are doing unless acted upon
You and your family are traveling to daytona beach for a vacation and your dad wants to get there in 7 hours. If daytona is 725 kilometers away how fast will he have to drive to get there on time
Answer:
103.57 Km/h
Explanation:
From the question given above, the following data were obtained:
Distance = 725 Km
Time = 7 hours
Speed =?
Speed can be defined as the distance travelled per unit time. Mathematically, it is expressed as:
Speed = Distance /time
With the above formula, we can calculate how fast he will drive (i.e the speed) in order to get there on time. This is illustrated below:
Distance = 725 Km
Time = 7 hours
Speed =?
Speed = Distance /time
Speed = 725 / 7
Speed = 103.57 Km/h
Thus, to get there on time, he will drive with a speed of 103.57 Km/h
chap 13
activity 13.5 class-10
Answer:
ummm im confused
A package is dropped from an airplane flying horizontally. As the plane continues on, where will the package hit the ground with respect to the plane? (ignore air resistance)
Position A
Position B
Position C
Answer:
Position B
Explanation:
The package when it is dropped from the airplane will still be traveling forward at the same speed as the aircraft. Since air resistance is ignored there is nothing affecting its horizontal velocity, so the package will hit the ground underneath the plane as they both move forward.
Most galaxies in the Universe are moving towards the Earth. True or False.
That's false.
There are billions of galaxies in the universe. A few of the nearest ones are moving TOWARD us, and ALL the rest are moving AWAY from us.
The farther a galaxy is from us now, the faster it's moving farther away.
A man lifts a 200 pound barbell over his head using 890 Newtons of force. It traveled a distance of 2.4 meters. Calculate the work done.
A. 2,136j
B. 83j
C. 371j
D. 480j
Answer:
371j
Explanation:
5. What is the minimum force required to move a 50 kg steel slab sitting at rest on a steel floor?
Answer:
490.5N
Explanation:
Step one:
given data
We are told that the mass is 50kg
m= 50kg
From Isaac Newton's first law of motion
F=ma
assuming a= 9.81m/s^2
Substituting we have
F=50*9.81
F= 490.5N
Hence the minimum force required to move the slab is
490.5N
A ball is projected vertically upward from the surface of the Earth with an initial speed of +49 meters per second. The ball reaches its maximum height in 5.0 seconds. What is the maximum height reached by the ball?
Which ionic compound is used as a building material? A.salt B.limestone C.magnesium oxide D.iron oxide
Answer:
Limestone
Explanation:
How do collisions affect the momentum of objects?
HELP ASAP
Answer:
Since the two colliding objects travel together in the same direction after the collision, the total momentum is simply the total mass of the objects multiplied by their velocity.
Explanation:
A rightward-moving dragster accelerates from 0 m/s to 75 m/s in 4.5 s. Determine the magnitude of the average acceleration of the dragster
in m/s/a
337.5 m/s/s
-16.67 m/s/s
28.5 m/s/s
-337.5 m/s/s
16.67 m/s/s
-28.5 m/s/s
Answer:
The magnitude of the average acceleration of the dragster is 16.67 [tex]\frac{m}{s^{2} }[/tex]
Explanation:
Acceleration is a vector quantity that relates changes in velocity to the time it takes to occur.
The average acceleration of a mobile is calculated using the following expression:
[tex]acceleration=\frac{change of velocity}{time}=\frac{vfinal - vinitial}{time}[/tex]
In this way you calculate the average change in speed in the desired time interval.
The unit of measurement in the International System of acceleration is the meter per second squared (m/s²)
In this case:
vfinal=75 m/svinitial= 0 m/stime= 4.5 sReplacing:
[tex]acceleration=\frac{75 m/s - 0 m/s}{4.5 s}[/tex]
Solving:
acceleration= 16.67 [tex]\frac{m}{s^{2} }[/tex]
The magnitude of the average acceleration of the dragster is 16.67 [tex]\frac{m}{s^{2} }[/tex]
What does equilibrium mean
Answer:
a state in which opposing forces or influences are balanced.
Explanation:
How does this action cause the skateboarders speed to decrease?
Pls help
Answer:
B. It increases the force of friction.
Explanation:
When the leg is being dragged with the girl while she is riding the skateboard, there is more contact surface area to the ground compared to when the leg was on the board so the force of friction between the girl & skateboard and the ground increases, causing her speed to decrease.
A sound wave generated by a musical note has the characteristics presented
in the table. What is the missing value?
Medium
Wave speed
(m/s)
346
Frequency
(Hz)
Wavelength
(m)
Air
55
?
Glass
5,640
55
102
Aluminum
6,420
55
117
A. 5.4
B. 4.7
C. 6.3
O
D. 7.5
Answer:
Explanation:subtract all of those by the all of the other numbers and that’s the answer i think that’s the way I learned it
What might cause a shotgun to explode?
this is due in like 10 mins so help me please
A bowling ball of mass 10.2 kg moves in a
straight line at 3.03 m/s.
How fast must a Ping-Pong ball of mass
3.309 g move in a straight line so that the two
balls have the same momentum?
Answer in units of m/s.
Answer:
v = 9341.19 [m/s]
Explanation:
Linear momentum is defined as the product of mass by Velocity. In this way by means of the following equation, we can calculate the momentum.
[tex]P=m*v[/tex]
where:
P = momentum [kg*m/s]
m = mass = 10.2[kg]
v = velocity = 3.03 [m/s]
Now replacing, we have:
[tex]P=10.2*3.03\\P = 30.91 [kg*m/s][/tex]
Now the ping-pong mass is 3.309 [g] or 0.003309 [kg]
We can clear the value for v from the equation above.
[tex]v = P/m\\v = 30.91/0.003309\\v = 9341.19 [m/s][/tex]
what happened to the kinetic energy when the velocy of a moving body is doubled?
Answer:
If velocity is doubled, Kinetic Energy increases by 4 times. Kinetic energy of a body is the energy possessed by it, by virtue of its motion, i.e. if the body is moving it will always have kinetic energy.Nov 1, 2018
Explanation:
Answer:
If velocity is doubled, Kinetic Energy increases by 4 times. Kinetic energy of a body is the energy possessed by it, by virtue of its motion, i.e. if the body is moving it will always have kinetic energy :)
Explanation:
hope this helps <3
A 20 kg sled is being pulled across a horizontal force at a constant velocity the pulling force has a magnitude of 80 N and it's directed at an angle of 30° above the horizontal determine the coefficient of kinetic friction
Answer:
0.58
Explanation:
Using the frictional force formula expressed as;
[tex]F_f = \mu R\\[/tex]
[tex]\mu[/tex] is the coefficient of kinetic friction
R is the normal reaction
[tex]\mu = \frac{F_f}{R}[/tex]
[tex]F_f = Wsin \theta\\R = W cos\theta\\\mu = \frac{Wsin \theta}{W cos \theta}\\\mu = \frac{sin\theta}{cos \theta} \\\mu = tan \theta[/tex]
Given
[tex]\theta = 30^0\\\mu = tan 30^0\\\mu = 0.58[/tex]
hence the coefficient of kinetic friction is 0.58
5 types of convertible energy
Answer:
Sound energy is converted into electrical energy in a microphone.
Electrical energy is converted into sound energy in a loud speaker.
Electrical energy is converted into mechanical energy in a motor.
Mechanical energy is converted into electrical energy in a generator.
Explanation:
mark me as the brainlist:)
