Answer:
t = 3.25 seconds.
Explanation:
A person throws a baseball from a height of 7 feet with an initial vertical velocity of 50 feet per second is given by :
[tex]h=-16t^2+vt+h_0[/tex]
[tex]h=-16t^2+50t+7[/tex]
We need to find the amount of time the baseball is in the air before it hits the ground. ATQ,
h = 0
[tex]-16t^2+50t+7=0\\\\t=\dfrac{-50 \pm \sqrt{50^2-4\times (-16)(7)} }{2(-16)}\\\\t=\dfrac{-50 + \sqrt{50^2-4\times (-16)(7)} }{2(-16)}, \dfrac{-50- \sqrt{50^2-4\times (-16)(7)} }{2(-16)}\\\\t=-0.134\ s,3.25\ s[/tex]
Neglecting negative value, t = 3.25 s
So, the baseball will hit the ground at t = 3.25 seconds.
A coin is dropped off of a building from rest at a height of 155 meters. What is the velocity of the coin as it hits the ground?
Answer:
period let the coin do what it do
Explanation:
HEY can anyone tell me the Atomic Mass of Helium and also what ever the number u get pls round it!!
Answer:
Hey!
Your answer is that the ATOMIC MASS of Helium is 4 u ROUNDED to 2 decimal places!
Explanation:
The precise amount is 4.002602 u.
I HOPE THIS HELPED YOU! :DTwo +1 C charges are separated by 3000 m. What is the magnitude of the electric force
¡Hello!
Topic: Electrostatic
For calculate electric force, we can apllicate formula:
[tex]\boxed{\boxed{\bold{F = k * \frac{q*q'}{r^{2} } } } }[/tex]
[tex]\sqrt{[/tex] F = Electric Force
[tex]\sqrt{[/tex] k = Coulomb Constant = 9x10^9
[tex]\sqrt{[/tex] q = Charges = 1 C
[tex]\sqrt{[/tex] r = Distance = 3000 m
Let's replace according the information, and let's resolve it:
F = 9x10^9 * (1 * 1) / 3000²
F = 9x10^9 * 1 / 9000000
F = 9x10^9 * 1.1111111e-7
F = 1000 N
Result:
The electric force is of 1000 N
Good luck
BRAINLIEST WILL BE GIVEN
Answer:
Mac’s Speed = 2.5 m/s
Tosh’s Speed = 4 m/s
Tosh moves 1.5 m/s faster than Mac.
Explanation:
Tosh starts from an initial position of 12m and in a span of 3 seconds, (1.00 seconds to 4.00 seconds) he moves 12 meters.
So his speed is distance / time
s = 12 / 3
s = 4 m/s
Mac starts from an initial position of 2m and in a span of 4 seconds, he traveled 10m (2.00m to 12.00m).
Speed = Distance / time
s = 10 / 4
s = 2.5 m/s
The two objects have different masses, the more massive object pulls with a greater force. TRUE OR FALSE?
Answer:
on earth yes, but in space no because there is no gravity
Explanation:
plz can i have some points
The force exerted by an object depends on the mass of the object. Greater mass results in greater force. Hence, the statement is true.
What is force?Force is an external agent acts on a body to change the substance from the state of rest or motion. There are various kinds of force such as nuclear force, magnetic force, frictional force etc.
According to Newton's law of motion force in a moving body is the product of its mass and acceleration. Hence, force is directly proportional to mass and acceleration and an increase in these quantities will increase the force exerted by the body.
Thus, greater force is needed to a move a body with greater mass. If two objects of different masses exerts force each other, the greater force will be exerted by the massive body.
To find more on force, refer here:
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How long will it take for a rock to fall 12 meters?
Answer:
approximately 5.8 seconds
Explanation:
if you where to time how fast a rock would fall 12 meters it would approximately be 5.8 seconds
Consider this situation: A force is applied to a box to move it
to the right across the kitchen floor. Of the forces listed,
identify which act upon the box.
Answer:
The static "frictional force" and the "kinetic friction" will act on the box.
When A force is applied to a box to move it to the right across the kitchen floor, static friction force comes into play before start moving. When the box starts moving, dynamic friction force comes into play.
What is friction?
The resistance provided by surfaces in touch as they move past one another is known as friction.
To walk without slipping, traction is provided by friction. In most situations, friction is advantageous. They do, however, give a strong amount of opposition to the move.
When A force is applied to a box to move it to the right across the kitchen floor, static friction force comes into play until it starts moving. When the box starts moving, dynamic friction force comes into play.
To find more about friction, refer the link:
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Goal: Use dimensional analysis to solve conversion problems. 1. Observe: In the question, you are asked to convert kilometers to centimeters. To do this, first you will convert kilometers to meters. Drag the 1000 meters/1 kilometer tile down. A. What do you notice? __________________________________________________ B. Because kilometers appear in the numerator of one term and in the denominator of another, they cancel, or disappear. The process of converting units by canceling is called dimensional analysis. How many meters are in 0.828 kilometers? ________________________________ C. A meter is a much shorter unit of measurement than a kilometer. Based on this fact, does your answer to B make sense? ______________________________________
Answer:
A. The kilometers unit is cancelled out and the result shown is 828 meters.
B. 828 meters are found in 0.828 Kilometers
C. Yes
Explanation:
A. When the 1000 meters/1 kilometer tile is dragged down, the kilometers unit is cancelled out and the value 828 meters appears.
This is because the kilometers appear in the numerator of one term and in the denominator of another, they cancel, or disappear. The process of converting units by canceling is called dimensional analysis.
B. 0.828 Kilometers * 1000 meters/1 kilometer = 828 meters
Therefore, there are 828 meters in 0.828 kilometers.
C. A meter is a much shorter unit of measurement than a kilometer. Based on this fact, it does make sense that 0.828 Kilometers which is less than 1 kilometer is equal to 828 meters.
(A) The process of converting units by canceling is called dimensional analysis.
(B) There are 828 meters in 0.828 kilometers.
(C) It does make sense that 0.828 Kilometers which is less than 1 kilometer is equal to 828 meters.
The given problem is based on some basic fundamentals and applications of dimensional analysis. So as per the given problem, each subpart says,
A.
When the 1000 meters/1 kilometer tile is dragged down, the kilometers unit is cancelled out and the value 828 meters appears.
This is because the kilometers appear in the numerator of one term and in the denominator of another, they cancel, or disappear. The process of converting units by canceling is called dimensional analysis.
Thus, we can conclude that the process of converting units by canceling is called dimensional analysis.
B.
Converting the given value of kilometers into the meters as,
0.828 Kilometers * 1000 meters/1 kilometer = 828 meters
Thus, we can conclude that there are 828 meters in 0.828 kilometers.
C.
A meter is a much shorter unit of measurement than a kilometer. Based on this fact, it does make sense that 0.828 Kilometers which is less than 1 kilometer is equal to 828 meters.
Thus, we can conclude that it does make sense that 0.828 Kilometers which is less than 1 kilometer is equal to 828 meters.
Learn more about the dimensional analysis here:
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If all objects that have mass also have gravity, why doesn’t your pencil orbit around you or get pulled towards you while it sits on the desk?
Answer:
it will fall off on the table
Explanation:
Answer:
Because the Earths Gravitational force is stronger.
Explanation:
You have less mass then the earth, and gravity is affected by mass and distance
which weathering occurs when minerals are chemically changed causing them to disolve or change into another mineral ?
Answer:
In chemical weathering minerals are changed into new minerals and mineral byproducts. Some minerals like halite and calcite may dissolve completely. Others, especially silicate minerals, are altered by a chemical process called hydrolysis. Hydrolysis is the reaction of minerals in weakly acidic waters.
Answer:
chemical
Explanation:
1.78 km = __m
Help plz
Answer:
1780
Explanation:
move decimal point to the right 3 times.
A water-balloon launcher with a mass of 2.0 kg is suspended on a wire. It
fires a 0.75 kg balloon to the west at a velocity of 14.0 m/s. What is the
resulting velocity of the launcher if the net force on the launcher is equal to
the reaction force?
A. 5.3 m/s east
B. 7.4 m/s east
C. 37.3 m/s east
D. 6.6 m/s west
Answer:
b
Explanation
Answer: 5.3 ms east
Explanation:
What’s a meandering stream?
What will happen if you drop a golf ball, a baseball, and a bowling ball at the same instant from the top of a tall building
What does wave speed only changes based on?
Answer:
waves change based on what they are traveling through
Explanation:
Light takes 1.28 s to travel from the Moon to Earth. What is the distance between them?
Answer:
384,000
Explanation:
Time taken by light to travel from earth to moon t=1.28s
Let us assume that the speed of light = c
So, the distance traveled by light in this time = c x t
this will be the distance which light traveled to reach moon, so this will be the distance between earth and moon.
The speed of light is 300000 km/s
By putting the values
we get
Distance = c x t
= 300000 x 1.28 km
=384000 km
What is the acceleration of a car that travels in a straight line at a constant speed of 100 km/h?
Group of answer choices
zero
100 km/h2
Not enough information to answer the question
-10 m/s2
A 2 row table with 7 columns. The first row is labeled Component with entries A Subscript x Baseline, A Subscript y Baseline, B Subscript x Baseline, B Subscript y Baseline, C Subscript x Baseline, C Subscript y Baseline. The second row is labeled Magnitude in kilometers with entries 1.6, 2.8, 3.9, 6.4, 1.2, 0.7. Three vectors are drawn on the x y plane. Vector A is drawn southwest, vector B northeast, and vector C southeast.
The image shows the displacement of a motorboat. The data table shows the magnitudes of the components of each displacement vector.
What is the value of Rx?
km
What is the value of Ry?
km
Answer:
rx=3.5 ry=2.9
Explanation:
i did it and i got them right
Answer:
Rx: 3.5km
Ry: 2.9km
Explanation:
3. The driver of a blue car is moving at a speed of 35 mph. A red car passes him at a speed of
49 mph. From the frame of reference of the red car, how would you describe the motion of
the blue car?
When this occurs, which type of tissue does the acid remove?
Answer:
A peptic ulcer is a sore on the lining of your stomach or the first part of your small intestine (duodenum). If the ulcer is in your stomach, it is called a gastric ulcer. If the ulcer is in your duodenum, it is called a duodenal ulcer
Intensity during a cardiovascular endurance workout means..
A. How often the activity is performed
B. How long the activity is performed
C. How hard the activity is performed
D. Where the activity is performed
C
Explanation:
It means how hard the activity is performed.To improve cardio respiratory endurance, the frequency of the workout sessions should be: 5 to 7 sessions per week.
PLSSS HELP ITS URGENT ILL RATE YOU BRAINLIEST:) A truck whose bed is 4 m long, 2.2 m wide, and 1.0 m high is delivering sand for a sand-sculpture competition. About how many trips must the truck make to deliver 23 m^3 of sand?
Answer:
one truck load is 2.5*1.5*1 = 3.75m^3
7/3.75 = 1.86 loads,
so 2 trips must be made.
Explanation:
Muscles covert chemicals energy int
Answer:
Mechanical energy
Explanation:
Mechanical energy is needed for movement of objects. Muscles convert chemical energy provided by the rest of the body to allow movement.
What have you heard about the pros and cons of using oil for energy? Describe what you have heard, and write down your own conclusions about the burning of oil.
Answer:
Explanation:
Pros: Very simple to create in any country to be exact, has high density, is more reliable than solar and wind type of energy.
Cons: not renewable, Pollutes the enviroment, Oil leaks are possible, Oil drills can happen (meaning explosians), Possibly can contain Harmful chemicals.
A permanent magnet cannot be used in electrical bell .Why?
Answer:
we can not use permanent magnets in radio and electric bells , because permanent magnets loose their property after some time whereas we can change the properties of electromagnet.
A sample of gold has a mass of 96.5g and a volume of 5.00cm^3. What is the density of gold?
Explanation:
sample of gold has a mass of 96.5 g and a volume of 5.00 cm3. The density of gold is a. 0518 g/cm3.
Taking into account the definition of density, the density of gold is 19.3 [tex]\frac{g}{cm^{3} }[/tex]
But first you must know the definition of density. Density is defined as the property that matter, whether solid, liquid or gas, has to compress into a given space.
In other words, density is the relationship between the weight (mass) of a substance and the volume that the same substance occupies.
The expression for the calculation of density is the quotient between the mass of a body and the volume it occupies:
[tex]density=\frac{mass}{volume}[/tex]
From this expression it can be deduced that density is inversely proportional to volume: the smaller the volume occupied by a given mass, the higher the density.
In this case, you know that:
mass= 96.5 gvolume= 5 cm³Replacing in the definition of density:
[tex]density=\frac{96.5 g}{5 cm^{3} }[/tex]
Solving:
density= 19.3 [tex]\frac{g}{cm^{3} }[/tex]
In summary, the density of gold is 19.3 [tex]\frac{g}{cm^{3} }[/tex]
Learn more about density:
brainly.com/question/952755?referrer=searchResults brainly.com/question/1462554?referrer=searchResultscan the answer to density be simplified
Answer: yes because all densities can be simplifed it just depends on the number.
Determine the horizontal component of 40m at 330 degrees?
Answer:
[tex]a_x=34.64\ m.[/tex]
Explanation:
Rectangular components of a vector
Given a vector [tex]\vec a[/tex], the x-component and y-component of the vector are given respectively by:
[tex]a_x=|\vec a|.\cos\theta[/tex]
[tex]a_y=|\vec a|.\sin\theta[/tex]
Where [tex]\theta[/tex] is the angle measured with respect to the positive horizontal direction.
Let's calculate the horizontal component of a vector with magnitude 40 m and angle 330°
[tex]a_x=40\ m.\cos330^\circ[/tex]
[tex]\boxed{a_x=34.64\ m.}[/tex]
72. An object travels at a constant velocity of 15 m/s for 5.0 seconds. How far does
it move during that time?
Kinematics equation/2
Answer: 125 m/s
Multiply 15 m/s by 5.0 minutes, because this will give you the product.
15 x 5.0 = 125.
Add the m/s sign to the 125. 125 m/s.
Answer = 125 m/s. Hope this helps!
1. A car is traveling at 36 m/s hits a tree and comes to rest in 0.05 seconds.
a. What is the acceleration of the car?
b. Airbags deploy in a car if the acceleration of a car exceeds -600 m/s^2 Will the airbags deploy?
Answer: a. -720m/s^2
b. Yes, airbags will deploy
Explanation:
The formula for acceleration is:
= (Final velocity - Initial velocity)/Time
Final velocity = 0m/s
Initial velocity = 36m/s
Time taken = 0.05s
= (Final velocity - Initial velocity)/Time
= (0 - 36)/0.05
= -36/0.05
= -720m/s^2.
Since it's negative, it shows that there was a deceleration.
2. Yes the airbag will deploy since the acceleration gotten is more than -600 m/s^2.