Answer:
Increase
Explanation:
Kinetic energy is the energy of motion--so the overall energy of that object would increase. Kinetic energy of an object is directly proportional to the square of its speed.
What is formed when two or more
elements combine chemically?
A. atom
B. solution
C. compound
Answer:
a.
Explanation:
Answer:
c
Explanation:
atom is a single element
solution is combination of 2 substances
compound is a combination of 2 elements
List 1 advantage and 1 disadvantage of a series circuit.
Explanation:
advantage: Easy to design and build the circuit
disadvantage: if one component in a series circuit fails, then all the components in the circuit fail because the circuit has been broken.
hope it helps!
Objects 1 and 2 attract easch other with a gravatinoal force of 72.0 units if the distance separating objects 1 and 2 is tripled then the new gravitonal force will be units
Given :
Objects 1 and 2 attract each other with a gravitational force of 72.0 units.
To Find :
If the distance separating objects 1 and 2 is tripled then the new gravitational force will be units.
Solution :
Let, initial distance is [tex]r_1[/tex] and final distance is [tex]r_2[/tex].
[tex]r_2 = 3r_1[/tex]
We know, gravitational force is inversely proportional to the distance between the objects. So :
[tex]\dfrac{G_2}{G_1}=\dfrac{r_1^2}{r_2^2}\\\\G_2 = \dfrac{G_1 \times r_1^2}{r_2^2}\\\\G_2 = \dfrac{G_1\times r_1^2}{(3r_1)^2}\\\\G_2 = \dfrac{72}{9}\\\\G _2= 8\ units[/tex]
Therefore, new gravitational force is 8 units.
Acodents canneer be presentes True or false
Answer: true
Explanation:mark me brainliest
A caterpillar walks at a constant speed of 0.011 m/s for 120 s. How far does it travel?
Explanation:
0.011m/s * 120s = 1.32m.
A caterpillar walks at a constant speed of 0.011 m/s for 120 s thus it will go 1.32 m distance.
How to find the speed of an object?If the object is going linearly, and at constant speed, then the speed of that object is given by the distance it traveled to the time it took to travel that distance.
If the object traveled D distance in T units time, then that object's speed is
[tex]Speed = S = \dfrac{\: Distance \: traveled}{\: Time \: taken} = \dfrac{D}{T} \: \rm unit \: length/unit \: time[/tex]
The distance covered by an object given it's velocity and time taken can be found by using the formula;
Distance = velocity × time
The velocity of caterpillar = 0.011 m/s
The time = 120 s
So we have
Distance = 0.011 × 120
Distance = 1.32 m
Hence, We have the final answer as 1.32 m
Learn more about speed here;
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An astronaut is doing repairs on the international Space Station. She throws a hammer into space with a velocity of 3m/s. How much force is needed to keep the 5kg hammer moving at 3m/s through space?
Answer:
The force is 15N
Explanation:
The formula is Force= mass × velocity.
From the question mass is 5kg, velocity is 3m/s.
F= 5×3
F= 15Newton.
Therefore the force is 15N.
Answer:
7.5 N
Explanation:
Given data :
velocity ( V ) = 3m/s
mass of hammer ( m ) = 5 kg
Determine the force needed to keep hammer moving through space
The force needed to keep the hammer moving in space can be calculated
F = ma ----- (1 )
m = 5 kg
a = velocity / time
velocity = displacement / time = 3 m/s hence displacement after 1 second = 3m
now we have to determine the acceleration using the relationship below
V^2 = V1^2 + 2(a)(d)
3^2 = 0 + 2(a) ( 3 )
9 = 6a ∴ a = 9/6 = 1.5 m/s^2
back to equation 1
F = ma
= 5 * 1.5 = 7.5 N
2) An airplane flies with a velocity v1=90 m/s to the west, but there is a crosswind of v2=40 m/s to the south.
a. What is the magnitude of the plane’s resultant velocity?
b. What is the plane’s resultant direction (from west)?
A physics student spins a bucket of water over her head in a circular path in order to demonstrate centripetal force. She fills the bucket half-full with water first, and then empties out half of its contents (so that the bucket is a quarter-full) for her next trial. In which case is more force required to spin the bucket, and why? Explain using relevant force equation(s).
Answer:
The first case requires more force to spin de bucket.
Explanation:
As we know, the centripetal force is directly proportional to the mass, the equation is given by:
[tex]F_{c}=ma_{c}[/tex]
The first case has a quarter more water than the second case, therefore the first case requires more force to spin de bucket.
I hope it helps you!
Read the sentence.
Marlena, who enjoys many different subjects, likes history and geography the best.
Which part of the sentence is the nonrestrictive modifier?
Answer:
ehfuheufhuwehfuehfuiheufh
Explanation:
Answer: C.) 'who enjoys many different subjects'
Explanation: Edge 2021
PLZZZ HELPP ASAP!!!!
Under conditions of conservation of energy where the initial energy object is only gravitational potential energy and the final energy is only kinetic, write an equation to calculate the final velocity of the object. Ignore all friction. Show all work
Name two of the four common boundary conditions we set when discussing gravitational potential energy?
An object with a mass of 32 kg has an initial energy of 500 J. At the end of the experiment, the velocity of the object is recorded as 5.1 m/s. If the object travelled 50 m to get to this point, what was the average force of friction on object during the trip? Assume no potential energy. Show all work
Answer:
1.68N
Explanation:
W=F*d
KE=1/2*M*V^2
M=32kg
V= 5.1m/s
D=50m
0.5(32)(5.1^2)= 416 J
Initial energy=500 J
final energy= 416 J
lost energy= 500-416
heat lost to friction=84 J
84=F*50
84/50=F*50/50
F=1.68N
Dave is walking from the back of a train to the front of the train at a rate of 6
kilometers per hour (km/hr). The train is traveling at a rate of 42 km/hr. What is
Dave's speed, relative to the ground?
A bus travels at a constant speed. it stops for a short time and then travels at a higher constant speed. draw a distance-time graph for this journey.
Answer:
See the explanation below
Explanation:
Since the bus travels at a constant speed, we can use the following equation.
[tex]x=x_{o}+v*t[/tex]
where:
x = final position [m]
xo = initial position = 0 (if the bus starts from some reference point)
v = constant velocity [m/s]
t = time [s]
Let's take some data as an example and then graph them.
v = 2 [m/s]
t = 2 [s]
That is, after two seconds, the final position will be:
[tex]x = 0 + 2*2\\x = 4 [m][/tex]
After the two seconds, the bus stops for about 2 seconds more. Then the bus will go with a velocity of 4 [m/s] for two seconds more.
So the total time is 6 [s].
Let's draw the x-t graph.
We see that the position changes during the first two seconds, from a position 0 to 4 [m]Then the bus stops for two seconds, that is, for 4 seconds the bus has traveled 4 meters.Then the bus moves to 4 [m/s], for 2 more seconds. That is, the bus will have moved up to 6 seconds.And the final offset must be calculated using the same equation.
[tex]x = x_{0}+v*t\\x = 4+4*(6-4)\\x = 4 +8\\x = 12 [m][/tex]
How many core electrons does calcium have ?
A 600 kg car travels with a constant speed of 20 m/s. How much gravitational potential energy does the car have is the total energy in the system is 180,000 J?
Answer:
60,000 J
Explanation:
The total Energy in the system = the sum of potential and kinetic energy
Total energy = K. E + P. E
K. E = 0.5mv²
m = mass ; v = velocity, K. E = kinetic energy
V = 20 m/s ; mass = 600kg
Total energy = 180000 J
Hence,
K. E = 0.5 * 600 * 20^2
K.E = 300 * 400
K. E = 120,000
P. E = TOTAL ENERGY - K.E
P.E = I80,000 - 120,000
P.E = 60,000 J
A dartboard consists of a circle inscribed in a square. The area of the circle is 25π square units. The area of the square is 100 square units.
A dartboard consists of a circle inscribed in a square.
Megan randomly throws a dart at the square. Assuming the dart lands within the square, what is the probability that the dart lands within the dartboard? Round your answer to the nearest tenth of a percent.
%
Answer: is will be 78.5%
Explanation:
Answer:
78.5%
Explanation:
correct on edge 2020 :)
what is the equation of instantaneous velocity
Answer:
it's possible to calculate an object's velocity at any moment along its path. This is called instantaneous velocity and it is defined by the equation v = (ds)/(dt),in other words, the derivative of the object's average velocity equation.
How does the horizontal velocity of a projectile change throughout its motion?
please answer in the form of a hypothesis using If, then, and because
The force of gravity pulls vertically down on the object. It does not pull left or right, so there are no horizontal forces due to gravity. This means the horizontal velocity remains constant throughout the object's projectile parabolic path.
Note: this is assuming wind resistance is ignored. If you account for wind resistance, then the object will slow down because the air particles push against the object and impede its progress.
Dr. Potter provides vaccinations against polio and measles.
Each polio vaccination consists of 4 doses, and each
measles vaccination consi
sts of 2 doses. Last year, Dr.
Potter gave a total of 60 vaccinations that consisted of a
total of 184 doses.
How many polio vaccinations and how many measles
vaccinations did Dr. Potter give last year?
Dr. Potter gave
polio vaccinations and
measles vaccinations
Answer:
hi zzayn i will solve this later
Explanation:
Let's establish that x= number of polio vaccinations and y=number of measles vaccinations.
Since Dr. P gave a total of 60 VACCINATIONS, we know that x+y=60. (This is equation #1)
We also know that Dr. P gave a total of 184 DOSES of the vaccinations and that the polio vaccine has 4 doses, while the measles vaccine has 2 doses. This means that our second equation is 4x+2y=184. (This is equation #2)
You can get either variable (x or y) by itself from equation #1. I always choose x.
x+y=60
-y. -y
x=60-y
Now we can plug our x value into equation #2.
4x+2y=184
4(60-y)+2y=184
240-4y+2y=184
240-2y=184
-240 -240
-2y=-56
/-2 /-2
y=28 measles vaccines
So we know that Dr. P administered 28 measles vaccines. We need to plug our y value back into equation #1 (or, to make it easier, our switched around equation) to find the number of polio vaccines.
x=60-y
x=60-28
x=32 polio vaccines
Answer:
zayn talk to meeee
Explanation:
an object is 40M below the surface of sea water of density 1020 kg/m3 calculate the pressure difference
Answer:
P = 400248 [Pa]
Explanation:
We can calculate the hydrostatic pressure exerted by a column of liquid by means of the following equation.
[tex]P=Ro*g*h[/tex]
where:
Ro = density = 1020 [kg/m³]
g = gravity acceleration = 9.81 [m/s²]
h = depth = 40 [m]
Therefore:
[tex]P=1020*9.81*40\\P=400248 [Pa][/tex]
Why is Pizza so good?
Answer:
its the cheese
Explanation:
A car starts from rest at the top of a hill with 45 J of gravitational
potential energy. If it has a mass of 3 kg, how fast will it be moving
at the bottom of the hill?
Answer:
The car will be moving at 5.48 m/s at the bottom of the hill
Explanation:
Principle of Conservation of Mechanical Energy
In the absence of friction, the total mechanical energy is conserved. That means that
[tex]E_m=U+K[/tex] is constant, being U the potential energy and K the kinetic energy
U=mgh
[tex]\displaystyle K=\frac{mv^2}{2}[/tex]
When the car is at the top of the hill, its speed is 0, but its height h should be enough to produce the needed speed v down the hill.
The Kinetic energy is then, zero. When the car gets enough speed we assume it is achieved at ground level, so the potential energy runs out to zero but the Kinetic is at max. So the initial potential energy is transformed into kinetic energy.
We are given the initial potential energy U=45 J. It all is transformed to kinetic energy at the bottom of the hill, thus:
[tex]\displaystyle \frac{mv^2}{2}=45[/tex]
Multiplying by 2:
[tex]\displaystyle mv^2=90[/tex]
Dividing by m:
[tex]\displaystyle v^2=\frac{90}{m}[/tex]
Taking square roots:
[tex]\displaystyle v=\sqrt{\frac{90}{m}}[/tex]
[tex]\displaystyle v=\sqrt{\frac{90}{3}}[/tex]
[tex]v=\sqrt{30}[/tex]
v = 5.48 m/s
The car will be moving at 5.48 m/s at the bottom of the hill
The quantity that is the same at all points in a series circuit is: current voltage power resistance
Answer:
On this page, we'll outline the three principles you should understand regarding series circuits: Current: The amount of current is the same through any component in a series circuit. Resistance: The total resistance of any series circuit is equal to the sum of the individual resistances
The quantity that is the same at all points in a series circuit is the current. The correct option is option (1).
The current in a series circuit is constant all the way around. This means that the same amount of current flows through each component, such as resistors, lamps, or other devices, connected in series.
The current is measured in units of amperes (A) and is determined by the voltage applied to the circuit and the total resistance in the circuit according to Ohm's law (I = V/R).
Therefore, The quantity that is the same at all points in a series circuit is the current. The correct option is option (1).
To know more about the current:
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Paulina kicks a football. It accelerates towards the goal at 10 m/s2. The ball has a mass of 430g. With what force did Paulina kick the ball?
Answer:
4.3 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question
430 g = 0.43 kg
We have
force = 0.43 × 10
We have the final answer as
4.3 NHope this helps you
I need help on this question, please.
Answer:
|X| = 72 cm
Explanation:
We need to find the magnitude of vector X.
Vector Y = 21 cm
Vector Z = 75 cm
We know that, the magnitude of resultant vector is given by :
[tex]Z={X^2+Y^2} \\\\X^2=Z^2-Y^2\\\\X^2=(75)^2-(21)^2\\\\X=72\ cm[/tex]
So, the value of magnitude of vector X is 72 cm
A ball starts at 10m East. The ball rolls 60 m West in 9 seconds. Then the ball rolls East for 85 m in 8 seconds. What was the velocity of the ball for the whole trip?
Answer:
The speed of the ball was 30.7 km/h.
Explanation:
To determine the speed at which the ball moves, it is necessary to make the sum of the distance traveled and the time it takes to travel that distance. Thus, since it first rolls 60 meters in 9 seconds, and then rolls another 85 meters in 8 seconds in the opposite direction, in total it rolls 145 meters in 17 seconds.
Thus, since 145/17 is equal to 8.52, its speed is 8.52 meters per second. Now, since a minute has 60 seconds, and an hour has 60 minutes, to determine the speed in meters per hour you must multiply 8.52 x 60 x 60, which results in 30,705.88 meters per hour.
Now, since a kilometer is 1000 meters, this number must be divided by 1000 to determine the speed in kilometers per hour: 30,705.88 / 1000 = 30.7.
In this way, the speed of the ball was 30.7 km / h.
A freely falling object is dropped from rest after falling for 4 seconds how far has it fallen (m) a.) 4 b.)10 c.) 20 d.) 40 e.) 80 ab.) 200
=======================================================
Explanation:
We'll use the free fall formula, which is,
y = 0.5*g*t^2
where
t = time in secondsg = acceleration of gravity (in m/s^2)y = vertical distance the object has fallen (in meters)In this case,
t = 4 secondsg = 10 m/s^2 approximatelyNote: The freefall assumes the object is not thrown down, and simply dropped (so initial velocity is 0).
So,
y = 0.5*g*t^2
y = 0.5*10*4^2
y = 0.5*10*16
y = 5*16
y = 80
The object has fallen about 80 meters. This value is approximate because g = 10 is approximate. Use g = 9.81 for a more accurate value (though even then this value of g isn't exact either). In this case, your teacher has opted to use g = 10.
Another reason why 80 meters is an approximate value is because we haven't accounted for air resistance. As the object falls through the air, the air particles push up and resist the movement of the falling object, and therefore slow it down. Think of a parachute. For entry level physics courses, you'll ignore air resistance as it greatly complicates the problem. Though it's handy to keep it in mind for later physics courses down the road.
Which has more density due to the compactness of the matter-- a bowling
ball or a volleyball?
Answer: the volleyball
Explanation:
The volleyball, in contrast, is full of air, which contains fewer, more widely spaced particles of matter. In other words, the matter inside the bowling ball is denser than the matter inside the volleyball. A bowling ball is denser than a volleyball.
Which scenario is an example of the transfer of thermal energy by radiation?
A. A piece of chocolate melts in a person's hand.
B. A microwave oven causes water molecules in a cup to vibrate
faster.
C. A person's body temperature falls as the person swims in the
ocean.
D. A hot-water heating system warms a room.
HURRY UP!!!!
Answer:the answer is B
Explanation: just took the quiz
Answer:
B. A microwave oven causes water molecules in a cup to vibrate
faster.
Explanation:
Air resistance is a fluid type of friction.
TRUE OR FALSE
Answer:
True
Explanation: Air resistance (also called drag) is a type of frictional force. Like all frictional forces, the force of air resistance always opposes the motion of an object. Usually, the air resistance force is not very strong.
Please help fast!
What is resistive force?
A bullet of mass 20 gm is shot from a gun with velocity 200ms^-1. The bullet stops after penetrating 6cm of a wood.
Determine resistive force of the bullet.
Answer:
In physics, resistive force is a force whose direction is opposite to the velocity of the body, or of the sum of the other forces, and may refer to friction and drag. The average resistance force is the change in momentum divided by the time required to stop the bullet. The distance covered under constant acceleration is 1/2 a* t^2.
