Answer:
Where is the question?
Explanation:
an object is dropped from the top of a building which is 75 meters high. what's it's velocity before it reaches ground
Hi there! :)
[tex]\large\boxed{38.34 m/s}[/tex]
Use the following kinematic equation to solve:
[tex]v_{f}^{2} = v_{i}^{2} + 2ad[/tex]
Where:
vf = final velocity (?)
vi = initial velocity (0 m/s, object started at rest)
a = acceleration (gravity = 9.8 m/s)
d = distance travelled (75 m)
Plug in the given values into the equation:
[tex]v_{f}^{2} = 0^{2} + 2(9.8)(75)[/tex]
Simplify:
[tex]v_{f}^{2} = 2(9.8)(75)\\\\v_{f}^{2} = 1470[/tex]
Take the square root of both sides:
[tex]v_{f} = \sqrt{1470} = 38.34 m/s[/tex]
1.) What is the half-life of a 100.0 g sample of nitrogen-16 that decays to 12.5 grams in 21.6 seconds?
Answer:
There the first one
Explanation:
Which type of electromagnetic wave has more energy than ultraviolet waves
have?
O A. Visible light
B. Infrared
O C. X-rays
O D. Microwaves
Answer: C. X-Rays
Explanation:
Answer:
C I am pretty sure
Explanation:
Image below
can someone answer these two questions? thanks
You must always include a direction when recording an amount of energy. Is this true?
Select the correct answer. How many sets make up a game in volleyball? ОА. Two OB. Three or Five Ос. Four or Six OD One
5 sets
Explanation:
Matches are played best of five sets. The first four sets are played to 25 points, with the final set being played to 15 points. A team must win a set by two points. There is no ceiling, so a set continues until one of the teams gains a two-point advantage. Previously, all sets were to 15 points, with the first four sets having a ceiling of 17 and the final set requiring at least a two-point winning advantage.
2
1 point
What is the relationship between wavelength and frequency in the electromagnetic spectrum?
As wavelength increases, frequency will decrease.
As wavelength decreases, frequency will decrease.
There is no relationship between wavelength and frequency,
1
2
As wavelength increases, frequency will increase.
what happens to the electrons of an element on the left side of the periodic table when it forms an ion? what happens to the right?
A bullet is fired in a horizontal direction with a muzzle velocity of 300m/s.In the absence of air resistance,how far will it have droppped in travelling a horizontal distance of how far it will drop one one second
Answer:
304.9m
Explanation:
Given
Velocity = 300m/s
Tim = 1sec
Required
Horizontal distance S
Using the formula
S= ut+1/2gt²
S = 300(1)+1/2(9.8)(1)²
S = 300+4.9
S = 304.9m
Hence the distance travelled is 304.9m
a truck is moving at a constant speed of 46m/s. What is its acceleration?
Answer:
the distance from point C to D is 7.75m
Explanation:
A toy plane with a mass of 20 kg is flying at 10 m/s. What is its kinetic energy?
A. 1 000 J
B. 200 J
C. 2 000 J
D. Cannot be determined
Answer:
[tex]\boxed {\boxed {\sf A. \ 1000 \ Joules}}[/tex]
Explanation:
Kinetic energy can be found using the following formula.
[tex]E_k=\frac{1}{2}mv^2[/tex]
where m is the mass and v is the velocity.
The mass of the toy plane is 20 kilograms and the velocity is 10 meters per second.
[tex]m= 20 \ kg \\v= 10 \ m/s \\[/tex]
Substitute the values into the formula.
[tex]E_k=\frac{1}{2}(20 \ kg) (10 \ m/s)^2[/tex]
Solve the exponent first.
(10 m/s)²= 10 m/s *10 m/s= 100 m²/s²[tex]E_k=\frac{1}{2} (20 \ kg) (100 \ m^2/s^2)[/tex]
Multiply the last two numbers together.
[tex]E_k= \frac{1}{2}(2000 \ kg*m^2/s^2)[/tex]
Multiply by 1/2 or divide by 2.
[tex]E_k= 1000 \ kg*m^2/s^2[/tex]
1 kilogram square meter per square second is equal to 1 Joule. Our answer of 1000 kg*m²/s² is equal to 1000 Joules[tex]E_k= 1000 \ J[/tex]
The kinetic energy of the toy plane is 1000 Joules
A wooden plank rests in equilibrium on two rocks on opposite sides of a narrow
stream. Three forces P, Q and Ract on the plank.
P
RA
plank
Q
How are the sizes of the forces related?
AP+ Q = R
BP+R =
CP= Q = R
DP= Q +R
Answer: P+R = Q
Explanation: upward forces = downward forces
Find the slope of the line that passes through the points (-1, 3) and (2, -5)-
Answer:
m=−8/3
Explanation:
Answer:
-8/3
Explanation:
Slope m= y2-y1/ x2- x1
what is a similarity between air pressure and temperature in the troposphere
Answer:
The temperatures
Explanation:
Heat rises
An object weighs 100 newtons on earth.What is its weight on the moon?
Answer:
a) The gravitational acceleration at the surface of the Moon is g moon=1.67 m/s
2
The ratio of weights (for a given mass ) is the ratio of g-values, so
W
moon
=(100N)(1.67/9.8)=17N.
(b) For the force on that object caused by Earth's gravity to equal 17 N, then the free fall acceleration at its location must be
ag
=1.67m/s
2
. Thus , .
ag
= r 2
Gm
E
⇒
a
g
Gm
=1.5×10
7
m
So the object would need to be a distance of r/R
E
=2.4 "radii" from Earth's center.
Answer:
20 N
Explanation:
Consider that earth's acceleration due to gravity is approximately 9.81 m/s^2. Also consider that the moon's acceleration due to gravity is about 1.62 m/s^2. Using these two values, we can easily find the weight of the object on the moon, given that the object weighs 100 N, and that F = ma.
First, let's break it up.
100/9.81 =
10.193679918450561 kg
10.193679918450561*1.62 =
16.513761467889908 N
≈ 20 N (with one significant digit, since that is the least amount of sig figs in the problem)
Which number sentence is true? *
376,425 >367,419
337,425 >337,524
336,425 <335,426
327,425<327,416
Answer:
first one
Explanation:
376,425 is the biggest number in general
Answer:
the first line is true whuch is 376425>367419
Describe reflection using the terms incident ray and reflected ray.
10 points fast
10 POINTS ASAP
Answer:
The normal line divides the angle between the incident ray and the reflected ray into two equal angles. ... The law of reflection states that when a ray of light reflects off a surface, the angle of incidence is equal to the angle of reflection
The law of reflection is the idea that when light rays strike a smooth surface, the angle of incidence and the angle of reflection are both identical. Additionally, the incident ray, the reflected ray, and the surface normal all reside in the same plane.
What is reflection?Reflection of light refers to the act of light rays hitting a surface and reflecting back.
According to the law of reflection, the angle of the reflected ray, when reflecting from a smooth surface, is equal to the angle of the incident ray, with regard to the surface's normal, which is a line perpendicular to the surface at the point of contact.At the point of contact of the incident ray, the reflected ray is always in the plane defined by the incident ray and the normal to the surface.The law of reflection explains how both curved and planar mirrors form images.
Learn more about reflection here:
https://brainly.com/question/28969632
#SPJ2
0.000000004004584 can be written as?
Answer:
40 229/5000
Explanation:
</3 PureBeauty
Answer:
0.000000004004584
Explanation:
Which is an example of a solution?
OA.
flour and water
B.
sand and water
C.
salt and water
D.
oil and water
E.
ice and water
Answer:
C
Explanation:
plato
Answer:
c. Salt and Water
Explanation:
When a ringing bell is caught with hands the sound ceases why
Pls help will mark brainliest
Answer: The pattern of the battery is wrong, the bulb is broken , the wires of the circuit is broken , the switch is not closed .
Answer:
circle the open switch on the right (it is open so the circuit is broken), the break in the wire on the left, opposite the switch (wire is broken so the circuit cannot continue) and on the left side of the bulb (bulb isn't fully connected so the circuit cannot continue). i think this is correct but my explanations may be a bit off, so just see where this takes you. hope it helps.
Why VR of second class lever is greater than 1?
Second class lever has mechanical advantage always more than one as load is in between fulcrum and effort making the effort arm longer than the load arm. It multiplies force. ... It does not multiply force but changes the direction of force.
Which statement BEST describes the relationship between our Solar System and the Milky Way galaxy?
A)Our Solar System is located in the center of the Milky Way galaxy.
B)The Milky Way galaxy is located in the center of our Solar System.
C)The Milky Way galaxy is located in the outer area of one of the orbits in our Solar System.
D)Our Solar System is located in the outer area of one of the spiral arms of the Milky Way galaxy.
Answer:
D)Our Solar System is located in the outer area of one of the spiral arms of the Milky Way galaxy.
Explanation:
Our solar system is one of millions of solar systems found in our galaxy, the Milky Way.
Hope that helps!
Have a great day! :D
The relationship between our Solar System and the Milky Way galaxy is option d. Our Solar System is located in the outer area.
Relationship between our Solar System and the Milky Way galaxy:The earth orbited the sun, so the solar system that orbited the center of the milky way.
Also, it does have solar system nearest to the 250 million for finishing the single revolution.
Hence, the option d is correct.
Learn more about solar here: https://brainly.com/question/12004410
A 0.5 kg mass moving East with a velocity of 8 m/s is acted upon by a force of 20 N for 2.0 sec.
a) What is the initial momentum of the mass?
b) What impulse was given to the mass?
c) What is the final momentum of the mass?
d) What is the final velocity of the mass?
Answer:b
Explanation:
1. When an object is not in motion, what is the sum of the forces acting upon that object?
2. How can forces cause an object to move, change direction, or stop?
3. In a baseball game, a batter is determined to hit a home run. Describe the motion needed from the batter to achieve this goal.
Answers needed ASAP, class in 30 minutes.
Answer:
Net external force is the sum of all of the forcing acting on an object. Just because there are forces acting on an object doesn't necessarily mean that there is a net external force; forces that are equal in magnitude but acting in opposite directions can cancel one another out.
Explanation:
Answer:
Kk so your answers are: 1 is The sum of all the forces acting on an object is the net force or resultant force. If all the forces cancel out, the resultant force is zero, else, the unbalanced force will cause acceleration of the object. Force is a vector and hence has both a direction and magnitude. 2 is Depending on the magnitude and direction of the force, it can cause an object to move, stop or change direction. For example, in baseball a pitcher throws the ball with a certain speed towards the hitter, who hits it, thus applying a force to it. and 3 is friction.
Explanation:
Make sure to mark as brainliest, and a tip: Try to reword these so its not copy and pasting from the internet!
can somebody help me with this please ?
Answer:
Speed = Distance by Time
so, 105/5
= 21 km/hr
Explanation:
hope it helps....
PLEASE HELP WILL MARK AND 5 STARS I AM TIMED!!!!!!!!1
Answer:
is there a better picture
Humans landed on moon for the first time in 1969. Which of these statements best
explains why humans should continue to send manned missions to moon?
A. They prove all current facts about moon incorrect.
B. They supress cold war between different countries.
C. They help discard some myths about moon.
D. They increase human resistance to extreme conditions.
thanks so much y’all <3
Answer:
D
Explanation:
Determine the number of turns of the primary winding of a transformer connected to a voltage of 380 V, if the number of turns of the secondary winding is 200 and the output voltage is 19 V.
Answer:
4000 turns
Explanation:
The formula to apply is ;
Voltage in secondary coil/ Voltage in primary coil = Turns on secondary coil/Turns in primary coil
Vs/Vp =Ns/Np
Given that;
Ns=200
Vp=380 V
Vs=19 V
Applying the formula as;
Vs/Vp = Ns/Np
19/380 = 200/Np
1/20 =200/Np
Np = 200/0.05
Np= 4000 turns
Carol tries to push a bookshelf across the room. As much as she tries, she can not get the bookshelf to move. Which statement best describes why the
bookshelf is not moving?
O
A Carol did not apply enough force to the bookshelf and so the forces are unbalanced.
B. Carol did not apply enough force to accelarate the bookshelf and so the forces are still balanced.
0
C. Carol applied too much force to the bookshelf and now the forces on the bookshelf are balanced
D. Carol applied too much force to the bookshelf and now the forces on the bookshelf are unbalanced
Answer:
B.
Explanation:
Carol did not apply enough force to accelarate the bookshelf and so the forces are still balanced.
Hope this helps!! :)