Answer:
In contrast to vectors, ordinary quantities that have a magnitude but not a direction are called scalars. For example, displacement, velocity, and acceleration are vector quantities, while speed (the magnitude of velocity), time, and mass are scalars.
What is the net force on a 3 kg rocket accelerating at a rate of 4 m/s2?
Answer:
12 NExplanation:
The force acting on an object given it's mass and acceleration can be found by using the formula
force = mass × acceleration
From the question we have
force = 3 × 4
From the question we have
12 NHope this helps you
A scientist tests what change would add the most energy to a moving ball. Which of these would add the most energy?
Tripling the speed of the ball.
Doubling the mass of the ball.
Doubling the speed of the ball.
Tripling the mass of the ball.
True or False The process of waves dropping sand on beach is called deposition
A red ball and a green ball are simultaneously thrown horizontally from the same height. The red ball has an initial speed of 40 m/s and the green ball has an initial speed of 20 m/s. Compared to the time it takes the red ball to reach the ground, the time it takes the green ball to reach the ground will be
Answer:
The green ball will get to the ground first because the time taken for the green ball to get to the ground is small when compared to that of the red ball.
Explanation:
From the question given above, the following data were obtained:
For the Red ball:
Initial velocity (u) = 40 m/s
For the Green ball:
Initial velocity (u) = 20 m/s.
Next, we shall determine the time taken for each ball to get to its maximum height.
For the Red ball:
Initial velocity (u) = 40 m/s
Acceleration due to gravity (g) = 9.8 m/s²
Final velocity (v) = 0 m/s (at maximum height)
Time (t) to reach the maximum height =?
v = u – gt (since the ball is going against gravity)
0 = 40 – 9.8t
Rearrange
9.8t = 40
Divide both side by 9.8
t = 40/9.8
t = 4.08 s
For the Green ball:
Initial velocity (u) = 20 m/s.
Acceleration due to gravity (g) = 9.8 m/s²
Final velocity (v) = 0 m/s (at maximum height)
Time (t) to reach the maximum height =?
v = u – gt (since the ball is going against gravity)
0 = 20 – 9.8t
Rearrange
9.8t = 20
Divide both side by 9.8
t= 20/9.8
t = 2.04 s
Finally, we shall determine the time taken for each ball to reach the ground.
For Red ball:
Time (t) to reach maximum height = 4.08 s
Time (T) to reach the ground =?
T = 2t
T = 2 × 4.08
T = 8.16 s
For Green ball:
Time (t) to reach maximum height = 2.04 s
Time (T) to reach the ground =?
T = 2t
T = 2 × 2.04
T = 4.08 s
Summary:
Ball >>>>>> Time to reach the ground
Red >>>>>> 8.16 s
Green >>>> 4.08 s
From the above illustration, we can see that the green ball will get to the ground first because the time taken for the green ball to get to the ground is small when compared to that of the red ball.
The time taken by the green ball to reach ground will be twice the time taken by the red ball.
Given data:
The initial velocity of red ball is, u = 40 m/s.
The initial velocity of green ball is, u' = 20 m/s.
In this problem when each ball reaches the ground, they will come to rest. Hence, the final velocity of each ball will be zero. So, in this sense we can use the first kinematic equation of motion as,
For red ball,
v = u + (-g)t
0 = 40 - (9.8)t
t = 40/9.8
t = 4.08 s
Now, for green ball,
v = u' + (-g)t'
0 = 20 - 9.8t'
t' = 20/9.8
t' = 2.04 s
Clearly,
t' = 2t
Thus, we can conclude that the time taken by the green ball to reach ground will be twice the time taken by the red ball.
Learn more about the kinematic equations of motion here:
https://brainly.com/question/14355103
Difference between lens formula and mirror firmula?
What is the scientific method? (SIMPLE PLEASE)
Answer:look it up lol
Explanation:
Maakskzksmzmzkzksksksksa
Answer:
The scientific method is defined as a method of research in which a problem is identified, relevant data is gathered, a hypothesis is formulated from this data, and the hypothesis is empirically tested.
Steps of the Scientific Method
1- Ask a question
2- Do research
3- Make a hypothesis
4- Test your hypothesis with an experiment
5- Analyze the data and make a conclusion
HOPE THIS HELPS AND PLEASE MARK BRAINLIEST!
Npk fertilizer is called a complete fertilizer,why?
Answer:
Complete fertilizers or balanced fertilizers are so-called because of their amounts of nitrogen, phosphorus, and potassium. ... If your soil already had an excess of one of the three nutrients in NPK, you could actually be harming some of your plants by adding more of it to the soil
Explanation:
How can doing work on an object increase its kinetic energy?
What about its potential energy?
Answer:If the object's speed increases.
Explanation:
If the object's speed increases, then its kinetic energy will increase. If the kinetic energy increases, the change in kinetic energy will be positive.
The work on an object increases its energy, that's how, its kinetic energy and potential energy increases.
What are kinetic energy and potential energy?
The definition of kinetic energy in Physics is as follows: Kinetic energy of an object is the measure of the work an object can do due to its motion. Kinetic energy is a scalar quantity that can only be characterized by magnitude.
Potential energy is stored energy that is affected by the relative positions of various pieces of a system. When a spring is compressed or stretched, its potential energy increases. A steel ball has higher potential energy when raised above ground than when it falls to Earth. It can do more work in the elevated position.
Potential energy is a property of a system, not an individual substance or particle; for example, the system made of Earth and the elevated ball has more potential energy as the two are separated.
Learn more about potential energy here:
https://brainly.com/question/24284560
#SPJ2
SUPER EASY!!!! WILL GIVE BRAINLIEST
How does a barometer work in measuring air pressure?
a.) A barometer has mercury in a dish. Air pressure pushes down on the mercury and forces it up into a glass tube. Thus, the higher the mercury rises in the tube, the higher the air pressure.
b.) A barometer contains fluid that expands or contracts based on the pressure. At a higher pressure, the fluid expands and rises in the tube.
c.) Barometers measure temperature, not pressure.
d.) A barometer contains a fluid that expands or contracts based on the pressure. At a higher pressure, the fluid contracts and lowers in the tube.
Answer:
A
Explanation:
don't mind that other guy... that was so rude the answer's A
you must be panicking lol last day of school today!
Answer:
a.) A barometer has mercury in a dish. Air pressure pushes down on the mercury and forces it up into a glass tube. Thus, the higher the mercury rises in the tube, the higher the air pressure.
Explanation
i have it on my test
Which is a compound?
A) A sandwich with bread, meat, and cheese?
B) A spoon made of pure silver?
C) Nickel and oxygen reacting chemically?
D) Long and short nails in the box
Car 1 of mass m1 is waiting at a traffic light.
Car 1 is struck from behind by Car 2 of mass m2.
The two cars stick together after the collision.
Car 2 was traveling at v2i = 30.0 m/s before the collision.
What is the initial kinetic energy, in [J], of car 1, if m1= 2500kg?
Answer: KE= 1/2 m v^2
KE= 1/2 2500 (0)^2
KE= 0
Explanation: since initial velocity is 0, the KE is 0.
The initial kinetic energy, in [J], of car 1 is 0.
KE= 1/2 m v^2
KE= 1/2 2500 (0)^2
KE= 0
What is kinetic energy?Kinetic energy is a form of energy that an object or a particle has by means of reason of its movement. If paintings, which transfer strength, are carried out on an object via making use of an internet pressure, the object hastens and thereby gains kinetic energy.
What's the initial and very last kinetic strength?The kinetic strength of an object depends on its velocity. To trade its pace, one must exert pressure on it. It turns out there's a connection between the pressure one applies to an object and the resulting change in its kinetic electricity: KE(very last) - KE(initial) = (force) (distance)
Learn more about kinetic energy here: https://brainly.com/question/25959744
#SPJ2
What is the general relationship between the surface temperature and
brightness of a main sequence star?
A. As the temperature increases, the brightness decreases
B. As the temperature increases, the brightness increases
C. As the temperature increases, the brightness remains the same
D. As the temperature remains the same, the brightness increases
Answer:
B. As the temperature increases, the brightness increases
Explanation:
When the stars are getting hotter, the luminosity would always get brighter. Hope this helps!
The general relationship between the surface temperature and brightness of a main sequence of star is that as the temperature increases, the brightness increase.
The stars are celestial bodies composed of a huge luminous ball of hot gas (hydrogen and helium gas). The luminosity of the star is driven by the nuclear fission reaction taking place in the star. This reaction takes place at a high increase temperature (of about 7 million ° C in sun) and a huge amount of energy is liberated. This causes the stars to shine and have an increased brightness.
Therefore, we can conclude that in a main sequence of the star, as the temperature increases, the brightness also increases.
Learn more about stars here:
https://brainly.com/question/7379319?referrer=searchResults
the slope of velocity time graph gives
Answer:acceleration
Explanation:m/sec^2
Calculate the wave speed for a wave with a wavelength of 2 m and a frequency of 0.3 Hz.
v=lf
a.
0.6 m/s
b. 1.67 m/s
C. 0.15 m/s
d. 2.3 m/s
Answer:
wave velocity is 0.6 so answer would be A.
Explanation:
Used omni wavelength calculator
What is the half-life of radium-226?
What is the momentum of a bird with a mass of 0.015 kg flying 12 m/s?
Answer:
momentum = mass • velocity
v= 17.5/2.5
= 7 m/s
Explanation:
I TOOK THE TEST
Which bonds form in the reaction shown in the diagram?
A. The bonds between the two hydrogen atoms
B. The bonds between the oxygen and hydrogen atoms
C. The bonds between the two oxygen atoms
D. The bonds between the two hydrogen atoms and between the two
oxygen atoms
Answer:
B. The bonds between the oxygen and hydrogen atoms
Explanation:
The bonds that formed in this reaction is one between the oxygen and hydrogen atoms.
This bond is called a covalent bond.
It develops by sharing of valence electrons between the two species. The oxygen and hydrogen attains their own stability this way. There is no bond between any wo hydrogen atoms in the diagram. An oxygen atom combines with two hydrogen atoms.Answer:
The correct answer is B.
How I know :
add me as a friend , ill add back so we can be friends !! <3
☆ REMINDER : ☆
☁ ˖⁺ stay safe we are still in the middle of a pandemic
☁˖⁺ drink plenty of water to stay hydrated
☁ ˖⁺ love yourself and know someone loves you
☁ ˖ never give up and talk to someone if your feelings scared/sad/mad
☁ ˖⁺ its never okay to stay silent .
﹤୨♡୧﹥ have an amazing day/night
A student adds ice to 150 mL of water. She observes that the temperature of the water decreases after 10 minutes. Which statement best explains the student’s observations?(1 point)
Potential energy was transferred from the ice to the water.
The ice lost potential energy.
Kinetic energy was transferred from the water to the ice.
The water gained kinetic energy.
Answer:
Potential energy was transferred from the ice to the water.
A force of 16 N to the west is applied to each object below. Which object will
undergo the greatest change in momentum?
A. A 41 kg object that is moving east at 5 m/s
B. A 41 kg object that is moving east at 10 m/s
C. A 44 kg object that is moving east at 10 m/s
D. A 44 kg object that is moving east at 5 m/s
41kg object that is moving east at 5 m s
Answer:
41kg object that is moving east at 5 m s
Explanation:
Consider this situation: A football travels upward and
rightward through the air. Of the forces listed, identify which
act upon the football.
Answer:
gravity and air resistance
Explanation:
life
Gravity and air resistance are the forces that will act on the football when it travels upward and rightward through the air.
What is Air resistance?The forces that oppose an object's relative motion as it moves through the atmosphere are known as air resistance. By working against the incoming flow's speed, these drag forces make the object travel more slowly. In contrast to other resistance forces, drag has a direct relationship with velocity because it is the portion of the net aerodynamic force that operates in the opposite direction from the direction of the movement.
When the ball will move upward with some velocity the gravity force will act on it, and it will try to come down due to that and another force that is air resistance will also act on the football to the air present in the atmosphere, and it will slow down the speed of football with time and the football make a projectile curve.
To get more information about Air resistance :
https://brainly.com/question/4428352
#SPJ5
The sun produces energy from matter in its core through the process of
Answer:
Nuclear Fusion
Explanation:
help pls will mark as brainliest if correct
Answer:
Because renewable energy creates little to no emissions compared to fossil fuel or non renewable energy.
Explanation:
it's simple and clear
Planet Kling has half the radius and 2 times the mass of the Earth. What is the best estimate for the magnitude of the gravitational field at the surface of planet Kling?
Answer:80 m/s^2
Explanation:
Answer:
80m/s²
Explanation:
First, use the equation below to find the strength of a planet/moon's satellite field and acceleration rate.
This is G × Mass of planet/moon ÷ r² (which is the distance or conversely radius squared)
Then you want to plg in all your values, which are going to be the gravitational constant, Kling's mass, and Kling's radius.
Remember that Earth's mass is equal to 5.97 × 10∧24 kg and its radius is exactly 6,731 km, so this will help you figure out your values for any other problems like this .
Also that the big ( G) you see is = 6.673×10∧-11.
Now for step two, which is the last thing you need to do. Once you've simplified the above equation, take the value you found, which should ≈ 7.85, and then multiply it by the force of gravity on Earth.
Once you multiply 7.85 by 9.8 m/s², the answer will be = 76.93 or ≈ 80m/s².
PLZZZ HELLPP MEE
Which of the choices below shows a model of the atom Neon (Ne)?
B.
D.
Ne
Ne Ne
OB
ОС
OD
Answer:
A is answer
Explanation:
this is helpful
A rock falls for 3 seconds. What was its velocity when it hit the ground?
Answer:
for this i uploaded i screenshot
Explanation:
The velocity of the rock after 3 seconds will be 29.43 meters per second.
What is velocity?Velocity is defined as the ratio of the distance moved by the object at a particular time. The velocity is a vector quantity so it needs both the magnitude and the direction.
Given that the rock is hitting the ground after 3 seconds. The velocity of the rock is calculated by using the equation of the motion formula.
v = u + at
Here v is the final velocity of the rock and u is the initial velocity and a is the acceleration and t is the time of falling of the rock. The initial velocity of the rock is zero because it is freely falling.
The final velocity will be calculated as below:-
v = u + at
v = 0 + ( 9.81 x 3 )
v = 29.43 meter per seconds
Therefore, the velocity of the rock after 3 seconds will be 29.43 meters per second.
To know more about Velocity follow
https://brainly.com/question/25749514
#SPJ6
An experiment was performed to determine how the amount of coffee grounds could affect the taste of coffee. The same kind of coffee, the same coffee pot, the same amount and type of water, the same cook time, and the same electrical sources were used (what is IV, DV, and one Control) *
Answer: Independent variable: The amount of coffee grounds.
Dependent variable: The taste of the coffee.
Controlled variables: The kind of coffee, the same percolator, the same amount and type of water, the same perking time, and the same electrical sources.
Explanation: In an experiment the independent variable is the variable that you change, the dependent variable is the variable that you are testing to see if it will change because of the change you made, and the controlled variables are the variables that stay the same.
The same car, after crossing the finish line, has a velocity of 45m/s, after 25 seconds. What was the acceleration for this time period?
Explanation:
velocity(v)=45m/s
time(t)=25s
now,
acceleration= V t=45
25
=1.8 m/s2
How are velocity and acceleration related?
Answer:
Acceleration is the rate of change of velocity. (when velocity changes -> acceleration exists) If an object is changing its velocity, i.e. changing its speed or changing its direction, then it is said to be accelerating. Acceleration = Velocity / Time (Acceleration)1. A soccer player runs directly up the field for 60 m before turning to the right at
an angle of 30° from his original direction and running an additional 20 m before
shooting a goal. What is the magnitude and direction of the player's total
displacement?
Answer:
The magnitude of the displacement of the soccer player is approximately 77.96 m
The direction of the displacement of the soccer player to the right of the direction directly up the field is approximately 7.37°
Explanation:
The given parameters are;
The distance the soccer player up the field = 60 m
The distance to the right the soccer player runs before shooting goal = 20 m
The direction to the right the soccer player turns from his original direction = 30°
Therefore, by resolution of the displacement, we have
d = 60·j + 20·cos(30°)·j + 20·sin(30°)·i
d = 60·j + 20·cos(30°)·j + 20·sin(30°)·i
d = 60·j + 20·(√3)/2·j + 10·i
d = 10·i + (60 + 10·√3)·j
The magnitude of the displacement of the soccer player [tex]\left | \mathbf{d} \right |[/tex] = √(10² + (60 + 10·√3)²) ≈ 77.96 m
The direction of the displacement = tan⁻¹(10/(60 + 10·√3)) ≈ 7.37° to the right from the direction directly up the field
HELP! I WILL BE GIVING 50 POINTS
A piece of charcoal has a volume of 2.6 cm3 and a mass of 1.48 g. What is the density of the charcoal?
A. 0.57 g/cm3
B. 1.1 g/cm3
C. 1.8 g/cm3
D. 4.1 g/cm3
Answer:
A
Explanation:
density=mass/volume
?=1.48/2.6
0.57=density
If a piece of charcoal has a volume of 2.6 cm3 and a mass of 1.48 g, then the density of the charcoal would be 0.57 g/cm3, therefore the correct answer is option A.
What is density?It can be defined as the mass of any object or body per unit volume of the particular object or body. Generally, it is expressed as in gram per cm³ or kilogram per meter³.
As given in the problem a piece of charcoal has a volume of 2.6 cm3 and a mass of 1.48 g and we have to calculate the density of the charcoal.
The mass of the charcoal = 1.48 g
the volume of the charcoal = 2.6 cm3
the density of the charcoal = mass of the charcoal/volume of the charcoal
the density of the charcoal = 1.46/2.6
= 0.57 g/cm3
Thus, the density of the charcoal would be 0.57 g/cm3, therefore the correct answer is option A.
Learn more about density from here,
brainly.com/question/15164682
#SPJ2
