Answer:
F = 35.84NExplanation:
Force = mass * acceleration (Newton's second law of motion)
Given
Mass = 32kg
Get the acceleration using the expression d = 1/2at^2
3.5 = 1/2 (a)2.5^2
3.5 = 3.125a
a = 3.5/3.125
a = 1.12m/s^2
Get the net force;
F = 3.2 * 1.12
F = 35.84N
Hence the net force used to accelerate is 35.84N
Which statement describes the path of electrons from a battery to a circuit?
O A. Electrons move away from the positive end of a battery and then
through the circuit toward the negative end of the battery.
B. Electrons move through the battery from the negative terminal to
the positive terminal and then into the circuit.
C. Electrons move through the battery from the positive terminal to
the negative terminal and then into the circuit.
D. Electrons move away from the negative end of a battery and then
through the circuit toward the positive end of the battery.
Answer:D
Explanation:
C is wrong
Electrons move away from the negative end of a battery and then through the circuit toward the positive end of the battery. So, the correct option is (D).
What is Circuit?An electronic circuit is made up of individual electronic components, such as resistors, transistors, capacitors, inductors and diodes, connected by conductive wires or traces through which electric current can flow.
A circuit is a complete circular path through which electricity flows where the circuit consists of a current source, a conductor, and a load. The term circuit can be used in a general sense to refer to a fixed path that electricity, data, or signals can travel.
In the electric circuit, electrons move away from the negative end of a battery and then through the circuit toward the positive end of the battery.
Thus, electrons move away from the negative end of a battery and then through the circuit toward the positive end of the battery. So, the correct option is (D).
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A golf ball is hit horizontally off the edge of a 30 m high cliff and lands a distance of 25 m from the edge of the cliff. What was the initial vertical velocity of the golf ball?At what time did the golf ball hit the ground?What was the initial horizontal velocity of the golf ball? What was the final horizontal velocity of the golf ball?
Answer:
V₀y = 0 m/s
t = 2.47 s
V₀ₓ = 61.86 m/s
Vₓ = 61.86 m/s
Explanation:
Since, the ball is hit horizontally, there is no vertical component of velocity at initial point. So, the initial vertical velocity (V₀y) will beL
V₀y = 0 m/s
For the initial vertical velocity of golf ball we consider the vertical motion and apply 2nd equation of motion:
Y = V₀y*t + (0.5)gt²
where,
Y = Height = 30 m
g = 9.8 m/s²
t = time to hit the ground = ?
Therefore,
30 m = (0 m/s)(t) + (0.5)(9.8 m/s²)t²
t² = 30 m/4.9 m/s²
t = √6.122 s²
t = 2.47 s
For initial vertical velocity we analyze the horizontal motion of the ball. We neglect the frictional effects in horizontal motion thus the speed remains uniform. Hence,
V₀ₓ = Xt
where,
V₀ₓ = Initial vertical Velocity = ?
X = Horizontal Distance = 25 m
Therefore,
V₀ₓ = (25 m)(2.47 s)
V₀ₓ = 61.86 m/s
Due, to uniform motion in horizontal direction:
Final Vertical Velocity = Vₓ = V₀ₓ
Vₓ = 61.86 m/s
PLEASE HELP MEEEEEE
Some physical evidence was obtained from a crime scene. For which of these pieces of evidence will forensic scientists conduct an identification test?
A.
a hair strand
B.
a black powder
C.
a glove
D.
bloodstains
Answer:
The correct option is D. bloodstains
Rohith has been jogging to the bus stop for 2.0 minutes at 3.5 m/s when he looks at
his watch and sees that he has plenty of time before the bus arrives. Over the next
10.0s, he slows his pace to a leisurely 0.75 m/s. What was his average acceleration
during this 10.0 s?
A force of 30 Newtons is used to push a basket along the floor a total distance of 3 meters. How much work is done on the basket?
Answer:
the total work done is 90J
Explanation:
the reason why is because you are the force (30 newtons) and the metere (3) so you will be multiplying those two numbers together.
W= FD 30(3)= 90J
where is the centripetal force directed on a banked curve?
Answer:
The net force on a car traveling around a curve is the centripetal force, Fc = m v2 / r, directed toward the center of the curve.
Explanation:LET ME KNOW IF ITS WRONG. HAVE A NICE DAY!!!!!!!!!!
Answer: The net force on a car traveling around a curve is the centripetal force, Fc = m v2 / r, directed toward the center of the curve. The centripetal force is directed at right angles to the motion and also along the radius towards the centre of the circular path. In order for a car to move around a circular track, something must provide a centipetal force. One source of the centripetal force is friction between the tires and the road. This means that the tires do not need to supply any friction at all to keep the car from slipping sideways. ...
Hope this helps... stay safe and have a great day!!! :D
a bird is traveling west with a velocity of 8 m/s and momentum of 40 mg*m/s what's the birds mass?
Answer:
m = 5 [mg]
Explanation:
We must remember that the definition of linear momemtum is defined as the product of mass by distance.
P = m*v
P = momentum = 40 [mg*m/s]
m = mass [mg]
v = velocity = 8 [m/s]
Now clearing m:
m = P/v
m = 40/8
m = 5 [mg]
HELP MEEEEE HURRRYYYY EASYY
What best describes the greatest height a ball will bounce off the ground after being dropped from a height of 50 centimeters?
A. Less than 50 centimeters, as the ball transforms some of its thermal energy into sound energy
B. Less than 50 centimeters, as the ball transforms some of its potential energy into sound energy
C. Greater than 50 centimeters, as the ball transforms some of its thermal energy into potential energy
D. Greater than 50 centimeters, as the ball transforms some of its potential energy into thermal energ
Answer:
C
Explanation:
thats what i think it depends on the amount of force someone dropped the ball with.
Answer: A) "Less than 60 centimeters, as the ball transforms a part of its potential energy into heat energy"
Explanation:
I took the test
Question 7 of 20
Which sample of water has the most thermal energy?
A. A 1.5 kg sample at 10°C
O B. A 0.5 kg sample at 1°C
O C. A 1 kg sample at 10°C
O D. A 1 kg sample at 4°C
Answer:
4
Explanation:
because she is thermal energy
Answer: A 1.5 kg sample at 10 degrees c
Explanation:
A PEX
what is the number of significant digits in the measurement 10.005m?
A satellite with a mass of 5.60 E5 kg is orbiting the Earth in a circular path at 7.037E 6 meters from
the center of earth. It is moving at 7.50 E3 m/s. Determine the satellite's acceleration. (3 points)
a)7.99 m/s2
b)01.07 E-3 m/s2
c)O 1.14 E-6 m/s2
d)4.48 E6 m/s2
Answer:7.99 m/s^2
Explanation:
A truck moving due south takes a turn and starts moving towards east while maintaining the same speed.
Its velocity remains constant.
It covers unequal distances in equal intervals of time.
Its velocity changes
None of the above
Answer:
Its velocity changes
Explanation:
When the truck changes direction, its velocity changes.
Velocity is a vector quantity that specifies the magnitude of motion and direction it is taking.
When direction changes, the velocity of a body will also change. This is unlike speed which is a scalar quantity.
Velocity is the displacement divided by time taken.
A machine has mechanical advantage 2,what does it mean?
Answer:
The mechanical advantage of a machine is 2. Mechanical advantage MA is the ratio of output (generated by the machine) force to input (applied to the machine) force. So MA = 2 means that for example if you apply 100 N then your machine will multiply that force and generate 200 N .
Which experimental discovery led Niels Bohr to revise Rutherford's model of
the atom?
A. Most alpha particles pass straight through a thin sheet of gold
foil.
B. Electrons have more energy the farther they are from the nucleus.
C. A few alpha particles bounce off a thin sheet of gold foil.
D. The beam in a cathode ray tube is moved by an electric force.
Answer:
Electrons have more energy the farther they are from the nucleus.
Explanation:
A P E X
A construction crew must use a lever to lift a boulder. The mechanical advantage of the lever is 6 and the lever applies a force of 1600 N to the rock. What is the force that the construction crew must apply to the lever?
Answer:
The force the construction crew must apply to the lever is 266.67 N
Explanation:
Mechanical advantage is the measure of the ratio of output force to input force in a system. Hence, mechanical advantage (MA) is given by the formula
[tex]MA = \frac{F_{o} }{F_{i} }[/tex]
Where MA is the mechanical advantage
[tex]F_{o}[/tex] is the output force
and [tex]F_{i}[/tex] is the input force
From the question, the mechanical advantage of the lever is 6
That is, MA = 6
and the lever applies a force of 1600 N to the rock
That is, Output force, [tex]F_{o}[/tex] = 1600 N
To determine the force the construction crew must apply to the lever, that is the input force, [tex]F_{i}[/tex]
From
[tex]MA = \frac{F_{o} }{F_{i} }[/tex]
We can write that
[tex]F_{i} = \frac{F_{o} }{MA}[/tex]
Then,
[tex]F_{i} = \frac{1600N}{6}[/tex]
[tex]F_{i} = 266.67 N[/tex]
Hence, the force the construction crew must apply to the lever is 266.67 N.
The force that the construction crew must apply is 266.67 N.
A machine is a device in which the effort applied at one end is used to overcome a load at another end. The mechanical advantage is the ratio of load to effort of a machine.
We have the following information;
Mechanical advantage (MA) = 6
Load = 1600 N
Effort = ?
Substituting values;
6 = 1600N/Effort
Effort = 1600N/6
Effort = 266.67 N
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pls help i will give u brianliest!
Answer:
Explanation:
neautrons and protons
Only visibly rough surfaces have friction between them
DESPERATE WILL GIVE BRAINLIST and thanks
Radiometric dating is a form of relative dating.
Question 4 options:
True
False
Answer: True
Explanation:
(i hope this helps sorry kinda late but i did not see any answers)but can i have brainlist
Which two elements have similar properties and 8 electrons in their
outermost shells?
Answer:
A. Neon and argon
General Formulas and Concepts:
Reading the Periodic Table of ElementsValence Shell configurationsExplanation:
Elements that have a full valence shell (the outermost shell), are in Group 18 of the Periodic Table.
Because their outermost shell is full, they are inert, meaning that they do not like to bond or react with other elements.
Therefore, these gases with a stable full valence shell are known as Noble Gases.
HeliumNeonArgonKryptonXenonRadonA. would be the correct answer.
Answer:argon and krypton
Explanation:
Noble gases
If a feather takes 2.5 seconds to drop 200cm, what is the speed of this feather
Answer:
80cm per second
Explanation:
What Machines that help you go faster
Answer:
If you mean for exercising then, The Treadmill. Purists may claim that treadmill running isn't "real" running. ...
The Elliptical Trainer. ...
The Stair-Climber. ...
The Cross-Country Skiing Simulator. are all machines that help you practice agility
Explanation:
Why are recessive traits not seen even though they are present in the alleles?
Answer:
Explanation:. The vending machine holds 10 bags of pretzels and 8 packs of cheese crackers. Both the pretzels and crackers dispenseat 2 bags per hour. How many hours will elapse when there is the same number of snacks remaining in the vending machine? How many of each item will there be at this point?Equation1______________________________Equation2_______________________________Hours: ___________________________ Items: ____________________________What does each equation have n common? ______________________How does this affect the solution?
What is the acceleration of car if it goes from 60 m/s to a stop in 6 seconds?
Answer:
[tex]\boxed {\boxed {\sf a= -10 \ m/s^2}}[/tex]
Explanation:
Acceleration can be found by dividing the change in velocity by the time.
[tex]a=\frac{v_f-v_i}{t}[/tex]
The car came to a stop, so it's final velocity is 0 m/s.
The initial velocity of the car is 60 m/s.
The time is 6 seconds.
[tex]v_f=0 \ m/s\\v_i=60 \ m/s\\t= 6 \ s[/tex]
Substitute the values into the formula.
[tex]a=\frac{0 \ m/s-60 \ m/s}{6 \ s }[/tex]
Solve the numerator.
0 m/s-60 m/s= -60 m/s[tex]a\frac{-60 \ m/s}{ 6 \ s }[/tex]
Divide.
[tex]a= -10 \ m/s^2[/tex]
The acceleration of the car is-10 meters per square second. The negative acceleration indicates it is slowing down/stopping.
23 POINTS
Sally and Ann are trying to move a box across the floor. Sally is pushing the box to the right with a force of 100N and Ann is pulling the box with a force of 50N to the right. What is the magnitude and direction of the box?
50N to the left
150N to the right
50N to the right
The box is balanced and will not move
Answer: 150N to the right...
Force acting on the box applied by Sally, F1= 100 N (right side)
Force acting on the box applied by Ann, F2= 50 N (right side)
It is clear that the two forces are acting on same direction. Let right side is positive direction. So, F= F1 + F2
F= 100+50
F=150 N
The direction of the box is towards the right side. So, the correct option is 150 N to the right... Hope this helps... Plz mark me brainliest.... Stay safe and have a great weekend!!! :D
While spending the weekend in your cabin, you burn wood in your pot-bellied stove to heat a kettle of water for tea.
Answer the following questions for 2 points each:
1. What type of energy does the wood have in this situation. Explain your answer.
2. What type of energy is this transformed into as the wood it burned in the stove. Explain your answer.
3. What type of heat transfer is being used to warm the kettle of water? Why does the water eventually boil?
Answer: 1 = Heat
2=gas
3=it gets hot enough to boil because the metal conducts the heat into the water to heat it up and eventually boil.
Explanation: its common sense
Average acceleration of an object is the:
Change in its position divided by the change in time
Change in time divided by the change in its position
Change in its velocity divided by the change in time
Change in time divided by the change in its velocity
Answer:
Change in its velocity divided by the change in time
Explanation:
the equation for average acceleration (a) = (vf-vi)/t
a = (velocity final - velocity initial) / change in time
The red car drive on a motor way in 800 m/s.The
driver of the Green car want to dive in that speed in
20 seconds.How many distance can he travel?
an electric motor converts electrical energy into what kind of energy?
A) potential
B) kinetic
C) stored
D) chemical
Answer:
B.) Kinetic energy.
Explanation:
A better answer would be mechanical energy, but they do not have that up there.
An electric motor converts electrical energy into kinetic energy. The rotational kinetic energy of the motor is its mechanical energy to work.
What is energy transformation ?Energy can neither be created nor be destroyed. However, it can be transformed from one form to the other. Hence, the total energy of a system is conserved.
The energy lost in one form is equal to the energy gained in another form. We are using many electrical devices all are working under the process of energy transformation.
In an electric motor, the electrical energy is converted to the rotational kinetic energy of the motor. It is used for mechanical work of the motor. The rotational kinetic energy make the motor rotating. Hence, option B is correct.
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What may also be called breakers? Crusher, Grappler, Hydraulic Hammer, Trencher
Question 10 (1 point)
When the student releases the water balloon, it swings forward. When the water balloon swings back, you can tell that the student expects the
water balloon to hit her face. Why does the water balloon not continue on and hit the student's face?
Answer:
It does not hit the students face because the speed of the balloon slows down as energy is lost through thermal.
Explanation: