Answer:
The velocity of the droplet right before it hits the ground is 40.08 m/s.
Explanation:
To determine the velocity of the droplet right before it hits the ground,
From one of the equations of kinematic for free fall motions,
v = u + gt
Where v is the final velocity
u is the initial velocity
g is acceleration due to gravity (take g = 9.8 m/s²)
and t is time
For the question, v is the velocity of the droplet right before it hits the ground.
u = 0 m/s (Since the molten lead was dropped from rest)
Therefore,
v = gt
First, we will determine the time t
Also, from one of the equations of kinematic for free fall motions,
h = ut + 1/2(gt²)
u = 0 m/s
From the question, the molten lead was dropped from the top of the 82.15 m tall tower, therefore
h = 82.15
Hence,
82.15 = 0×t + 1/2 (9.8 × t²)
82.15 = 1/2 (9.8 × t²)
82.15 = 4.9 t²
t² = 82.15/4.9
∴ t = 4.09 secs
Now, for the velocity v, of the droplet right before it hits the ground,
Recall
v = gt
Then,
v = 9.8 × 4.09
v = 40.08 m/s
Hence, the velocity of the droplet right before it hits the ground is 40.08 m/s.
What is the difference between fitness activities and team sports? Provide an example for both reasons.
Answer:
you get to participate in a activity but not in PE that you have to do
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
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
What’s a meandering stream?
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]
Two +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
Runner A is initially 5.8 km west of a flagpole and is running with a constant velocity of 8.6 km/h due east. Runner B is initially 4.9 km east of the flagpole and is running with a constant velocity of 7.1 km/h due west. How far are the runners from the flagpole when their paths cross? Answer in units of km.
Answer:
Runner A will be 0.05 km from the flagpole, and runner B will be 0.07 km from the flagpole
Explanation:
We can find when their paths will cross as follows:
[tex] X_{f} = X_{0} + v_{0}t + \frac{1}{2}at^{2} [/tex]
Where:
[tex]X_{f}[/tex] is the final position
[tex]X_{0}[/tex] is the initial position
v₀ is the initial speed
t is the time
a is the acceleration = 0 (since they are running with a constant velocity)
When their paths cross we have:
[tex]X_{fA}+X_{fB}=5.8+4.9=10.7 km[/tex]
[tex]V_{A}t+V_{B}t=10.7[/tex]
[tex]8.6t+7.1t=10.7[/tex]
[tex]t = 0.68 h[/tex]
Now we can find the final distance of each runner.
[tex]X_{fA}=V_{A}*0.68[/tex]
[tex]X_{fA}=8.6*0.68 km[/tex]
[tex]X_{fA}=5.85 km[/tex]
[tex]X_{fB}=V_{B}*0.68[/tex]
[tex]X_{fB}=7.1*0.68[/tex]
[tex]X_{fB}=4.83 km[/tex]
Therefore, runner A will be 0.05 km from the flagpole, and runner B will be 0.07 km from the flagpole.
I hope it helps you!
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.
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.
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.
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.
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:
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
1.78 km = __m
Help plz
Answer:
1780
Explanation:
move decimal point to the right 3 times.
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.
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:
https://brainly.com/question/22015862
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:
https://brainly.com/question/13191643
#SPJ3
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:
can the answer to density be simplified
Answer: yes because all densities can be simplifed it just depends on the number.
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
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
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!
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
1. If a ball is rolling horizontally on the floor with a velocity of 2.5 m/s, what are the x and y
components of the velocity?
Vx =
Vy =
Answer: Vx = 2.5m/s and Vy = 0m/s
Explanation: The ball is rolling horizontally on the floor, meaning there isn't a change in the vertical position, only horizontal. The ball is rolling with pure horizontal motion and isn't moving in the vertical direction.
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:
which force produces acceleration in falling bodies?
Answer:
Gravity produces acceleration
People playing a basketball game in a gymnasium make up a closed system
with 17,125 J of energy. At the beginning of the game the system has 16,250
J of ME, and at the end it has 1,135 J of ME. How much of the total energy
was transformed into thermal energy during the game?
Answer:
15,115 J of the total energy is transformed to thermal energy during the game.
Explanation:
From the law of conservation of energy, initial energy of the closed system E = final energy of closed system , E'
E = E'.
Let ME = initial mechanical energy of the system = 16,250 J and U = initial internal energy of the system and ME' = Final mechanical energy of the system = 1,135 J and U' = Final internal energy of the system.
So E = ME + U and E' = ME' + U'
We now find U and U'
Substituting E, ME, E' and ME' into the equations, we have
E = ME + U
17,125 J = 16,250 J + U
U = 17,125 J - 16,250 J
U = 875 J
E' = ME' + U'
17,125 J = 1,135 J + U'
U' = 17,125 J - 1,135 J
U' = 15,990 J.
The change in internal energy is also the change in thermal energy. So,
ΔU = U' - U
ΔU = 15,990 J - 875 J
ΔU = 15,115 J
So 15,115 J of the total energy is transformed to thermal energy during the game.
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
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: