A bullet is fired horizontally at 343 m/s from the top of a building where height is 37.3 m. The built will be
in flight for seconds
Answer:
Explanation:
A classic projectile motion question. Horizontal motion does not matter whatsoever in the context of this equation as we are looking at the vertical component of velocity only. Since the question states that it is fired horizontally, there is no vertical component of velocity. Thus, v0y = 0.
Assuming the projectile is on the Earth, we can use the free-fall acceleration, 9.8 m/s^2.
The question gives us Δy, which is 37.3m.
Using the second kinematics equation, Δy = v0t + (at^2)/2, we can substitute in the values.
37.3 = 0 + 0.5(9.8)t^2
37.3 = 4.9t^2
7.61224489796 = t^2
t = 2.75902970226 seconds.
PLEASE HELP ME SOMEONE PLEASE
Answer:
a protons
b equals
c neutrons
d add
e electrons
Graphs show relationships between two or more variables. Which three features describe a line graph?
A.
Shows how a variable changes in relation to another variable
done
B.
Has an x-axis and a y-axis
C.
Shows the dependent variable on the x-axis
D.
Has neither an x-axis nor a y-axis
done
E.
Shows the independent variable on the x-axis
Answer:
A, B, and E
Explanation:
C and D are wrong;
Line graphs do not show the dependent variable on the x-axis.
Line graphs do have both an x-axis and a y-axis.
Which of the following statements accurately describe a scientific law?
there is no contradictory evidence in the current body of knowledge
it is an educated guess about how a process occurs
can be updated or rejected if any contradictory evidence is found
it is an statement that is true in many, but not all, cases
it is an observation that has been made many times
Answer:
The first statement appears most accurate.
The last statement also appears accurate, but it does not preclude any contradictory evidence.
The following statements accurately describe a scientific law: There is no contradictory evidence in the current body of knowledge. It is a statement that is true in many, but not all, cases. It is an observation that has been made many times.
The other statements do not accurately describe a scientific law:
"It is an educated guess about how a process occurs" describes a scientific hypothesis or theory, not a law.
"Can be updated or rejected if any contradictory evidence is found" describes the nature of scientific theories, which can be revised or discarded based on new evidence, but laws tend to remain consistent.
To know more about statements
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The Sun always shines on half of the Moon. During a new moon, the Moon looks dark.
Where is the lit side of the Moon during a new moon?
Answer:
It is facing away from the Earth.
Explanation:
If half of the moon is always illuminated by the sun, and we can't see the illuminated side during a new moon, the moon is turned away from the Earth.
What is the acceleration of your car if it has a force of 8000N acting upon
it, and it has a mass of 1000kg?
Explanation:
F = m a
8000 = 1000 a
a= 8 m/s²
A student pushes a chair into a desk. If the student's push is the action force, then what is the reaction force in this example of Newton's third law?
A. the force that the chair exerts on the desk after it is pushed in
B. the force of friction acting on the chair
C. the force of gravity acting on the chair
D. the force from the chair on the student
Answer:
Ans : C
Explanation:
C. The force of gravity acting on the chair
Answer:
D. the force from the chair on the student
Explanation:
Newton's third law: If an object A exerts a force on object B, then object B must exert a force of equal magnitude and opposite direction back on object A.
This law represents a certain symmetry in nature: forces always occur in pairs, and one body cannot exert a force on another without experiencing a force itself.
Hope this helps :)
16. After a crime scene has been photographed, the field inspector will collect and package the * O circumstantial evidence O scientific method O physical evidence O individual characteristics
The physical evidence are the silent witnesses against the perpetrators of a crime
The correct option of what the field inspector packages after the crime scene has been photographed is the option;
Physical evidenceReason:
Physical evidence are evidence that originate from inanimate objects or origin that is nonliving, and includes every material or object that serve as an indicator that someone has committed a crime, or that can link a perpetrator to crime
Examples include; Documents, hair, skin, fingerprints, weapons, soil, or fibers
The field inspector, collects the evidence that shows that a crime has been committed which are the physical evidence, after the crime scene has been photographed
Therefore, the correct option is; Physical evidence
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PLEASE HELP MEH
Which of the following are molecules? (Select all that apply.)
K
Mg
H2
MgCl2
Answer:
K and H2
Explanation:
H2 is correct...
Thank you have a magnificent day ahead.
The arrow is pointing to sodium’s
number of neutrons.
chemical symbol
atomic mass
combined number of electrons and protons.
Answer atomic mass
Explanation:
i took the test and got 100
A traveling at 35 m/s increases its speed to 40 m/s in 5 seconds in order to make a lane change.
What is the car's acceleration
Answer:
The acceleration of the car was one meter per second squared.
Explanation:
We can use one of the kinematic equations:
[tex]\displaystyle v_f = v_i + at[/tex]
Where v_f is the final velocity, v_i is the initial velocity, a is the acceleration, and t is the time (in seconds).
The final velocity is 40 m/s, the initial velocity is 35 m/s, and the time is 5 s. Substitute and solve for a:
[tex]\displaystyle \begin{aligned}(40 \text{ m/s}) &= (35 \text{ m/s}) + a(5\text{ s}) \\ \\ 5 \text{ m/s} &= a(5\text{ s}) \\ \\ a &= 1\text{ m/s$^2$} \end{aligned}[/tex]
In conclusion, the acceleration of the car was one meter per second squared.
Liam está empujando una caja pesada por una rampa a una velocidad constante. Hay fricción entre la rampa y la caja. La caja
Answer:
Liam played danganrampa
Explanation:
here’s a clearer picture :)
Explanation:
so your answer is 4 km/ day, which I have given in earlier answer,.
hope this helps you again.
On a trip you travel at a constant speed of 25 kilometers per hour South for 1 hour. You then turn West and travel at a constant speed of 50 kilometers per hour for 2 hour. Calculate your velocity for the trip.
Answer:
41.66 km/h
Explanation:
Calculate the distance of 1st travel :
v = d/t
25 km/h = d/1 h
d = 25 km/h × 1 h
d = 25 kmCalculate the distance of 2nd travel :
v = d/t
50 km/h = d/2 h
d = 50 km/h × 2 h
d = 100 kmCalculate the velocity of trip :
v = d/t
v = (25 + 100)/(1 + 2)
v = 125 km/3 h
v = 41.66 km/hSo, my velocity for the trip is 41.66 km/h
A 4300-N force from a car's engines produces an acceleration of 3.3 m/s2. What is the mass of the car?
A. 4300 kg
B. 1300 kg
C. 14,000 kg
D. 390 kg
Answer:The net force acting on the car is 3×103 Newtons
Explanation:
An individual’s mental predisposition that influences perceptual expectations is one’s perceptual __________. A. bias B. knowledge C. assumption D. set
[tex]▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ { \huge \mathfrak{Answer}}▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ ▪ [/tex]
The Correct choice is D
An individual’s mental predisposition that influences perceptual expectations is one’s perceptual set .
A 2.6 kg rock is dropped from a height of 10 m. With what speed will it strike the ground. Ignore air resistance. Solve using conservation of energy (start with Ebefore = Eafter).
Answer:
[tex]mgh = \frac{1}{2} m {v}^{2} \\ v = \sqrt{2gh} \\ = \sqrt{2 \times 9.8 \times 10} \: m. {s}^{ - 1} [/tex]
A FORCE OF 3,200 N WEST is applied to a 160 kg mass. What is the acceleration of the mass
I NEED A SCIENCE EXPERT TO GIVE ME THE RIGHT ANSWERS TO THESE ASAP
Answer:
indepent valuable and random variable
PLEASE HELP ASAP THANK YOU You're out for run. Your initial velocity is 1.5 m/s. Suddenly a crazy dog starts chasing you and you
accelerate to a velocity of 3 m/s. It takes you 10 seconds to find a safe place to hide from the
Chihuahua. What was your displacement?
Show work
Answer:
Your displacement would be
s = 22.5 m
s=1/2(v+u)t
What is the net force on charge placed at the center of square of length 1m? All charges have same magnitude of 2 micro coulomb.
Answer:
Electric Field intensity is zero.
The reason for that is:
All charges are placed at equal distances from the center of the square and have same magnitude and sign. This means they will exert equal and opposite forces on the test charge at the center. Net force will become Zero.
make a island with all renewable energy soursws and how it works and about it but at year 9 level
Answer:
How are we expected to make an island
How can we show magnetic field lines?
Answer:
Magnetic field lines are defined to have the direction that a small compass points when placed at a location. (a) If small compasses are used to map the magnetic field around a bar magnet, they will point in the directions shown: away from the north pole of the magnet, toward the south pole of the magnet.
Explanation:
have a beautiful day ahead
Magnetic fields can be mapped out using small plotting compasses : place the plotting compass near the magnet on a piece of paper. move the plotting compass to many different positions in the magnetic field, marking the needle direction each time. join the points to show the field lines.
Sean, an astronaut stands on the edge of a lunar crater and throws a Frisbee™ horizontally with a velocity of 5.00 m/s. With no atmosphere on the moon the Frisbee ™ will not have any force of lift so it will “fly” like a stone. The floor of the crater is 77.0 m below the astronaut. What horizontal distance will the Frisbee™ travel before hitting the floor of the crater? (The acceleration of gravity on the moon is 1/6th that of the Earth).
Answer:
48.55mm
Explanation:
A rubber duck sat is floating on the surface
on the water. 10N of weight is acting
DOWNWARDS on the water. What other
force must be acting to allow the duck to
float?
The other force that must be acting on the duck is upthrust of 10 N.
The given parameters;
weight of the rubber duck, W = 10 NWhen the weight of the object is equal to the upthrust, the apparent weight will be zero and the object will float in the liquid. This is known as principle of floatation.
Since the given weight of the rubber duck is 10 N, then the upthrust on the duck will be 10 N to enable the duck float on the water.
Thus, the other force acting on the duck is upthrust of 10 N.
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An object is traveling at a constant velocity of 8 m/s when it experiences a constant acceleration of 3.5 m/s2 for a time of 40 s. What will its velocity be after that acceleration?
Answer:566.3
Explanation:
A mason is shot with a constant speed of 7.5 x 10²m/sinto a region, when an electric field produces acceleration on the mason of magnitude 1.5 x 1025 ms-2 directed opposite to the velocity. Find the time taken (b) the distance covered by the mason before coming to rest and (c) the time for which it remains at rest.
Answer:
Distance, d = 0.1 m
It is given that,
Initial velocity of meson,
Finally, the meson is coming to rest v = 0
Acceleration of the meson, (opposite to initial velocity)
Using third equation of motion as :
s is the distance the meson travelled before coming to rest.
So,
s = 0.1 m
The meson will cover the distance of 0.1 m before coming to rest. Hence, this is the required solution.
1. Width of A postage stamp is one m, 15 cm, or 20 mm
2. A thickness of ACD 0.1 m 0.01 m or 0.001 m
3. Height of a bus 152.4 mm, 20M, or 250 cm
4 Length of an inch worm 25.4 mm, 25.4 cm or 0.254 m
5. Length of a football field 91.44 m 200 m or one km
Will give brainless
A child throws a ball up with an initial velocity of 4
m/s. If the starting height of the ball was 2.5 meters,
what will be the height of the ball after 0.5 seconds?
Use a = -9.8 m/s/s.
The height of the ball after the given time of motion is 3.275 m.
The given parameters;
initial velocity of the ball, u = 4 m/sheight of fall of the ball, h = 2.5 mtime of motion, t = 0.5 sThe distance traveled by the ball is calculated as follows;
[tex]h =h_0 + ut - \frac{1}{2}gt^2 \\\\h = 2.5 + 4(0.5) - (0.5\times 9.8\times 0.5^2)\\\\h = 3.275 \ m[/tex]
Thus, the height of the ball after the given time of motion is 3.275 m.
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Which of the following is the correct definition of electric magnetic field
Answer:
the electric magnitic is not a field to have an violen not elictric because a pandmic
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