Answer:
Explanation:
Oftentimes when people hear that something has a low or high pH, they worry that it is dangerous. But this is not the case, pH alone cannot tell you if a substance is dangerous or not. Anyway, bases are typically considered more dangerous than acids! But what is pH? A substances pH is simply the concentration of hydrogen ions (H+) of the material when in solution (usually water). It is a numeric (logarithmic) scale used to specify how acidic or basic an aqueous solution is and an aqueous solution is just a solution where water is the solvent.
(FREE FALL) An object falls from an unknown height, crosses last 196m in 4s. Find the falling time and height.
Answer: An object is dropped from a height of 75.0 m above ground level.
Explanation: I hoped that helped !
Which of these shows unbalanced forces at work on an object?
Answer:
When forces on a object become unbalanced, the object moves.
Explanation:
The mass of a moving object increases, but its speed stays the same. What happens to the kinetic energy of the object as a result?
Alt decreases
Answer:
kinetic energy increases because of speed and motion overall
Explanation:
dont know if i helped you but you can give me a thumbs down if you hate the answer or it is not the answer you are looking for
Bob roller skates with a constant speed of 6 miles per hour. How long
will he take to travel a distance of 128 miles ?
What is the greatest velocity which a falling object can achieve while falling through the air?
A. final velocity
B. terminal velocity
C. initial velocity
D. maximum velocity
Answer:
Terminal Velocity
Explanation:
2
Which of the following best describes temperature?
A
Number of molecules
B
Motion of molecules
C
Size of molecules
D Type of molecules
Answer:
B
Explanation:
Answer:
b the motion of molecules
Explanation:
i just took the test and it makes the most sense
What is the net force of a motorcycle if it has a mass of 250 kg and an acceleration of 68 m/s2?
The focus of an earthquake is the: center of the earthquake point on the surface directly above the earthquake point underground where the earthquake starts direction the seismic waves travel
Answer:
B. point on the surface directly above the earthquake
Explanation:
The earthquake involves the propagation of waves through the inner part of the earth due to natural or artificial processes. This majorly leads to the vibration of the earth crust of the affected region as the waves propagates. Thereby, causing sometimes the a violent break up of the surface of the earth from within.
Therefore, the focus of an earthquake is majorly called its epicenter, which is a point on the surface directly above the earthquake itself.
The strength of force is expressed by a. Weight b.mass
Answer:
Weight.
Explanation:
Jane is a crime scene investigator. She wants to reveal small particles with high contrast. So, she positions the forensic lamp at a very low angle against the surface. Which technique is she using? A. fluorescence B. oblique lighting C. absorption D. spectroscopy E. stereoscopy
Answer:
Pretty sure it's B. Oblique Lighting
Explanation:
A. is clearly wrong, C. is also clearly wrong, D and E both have nothing to do with lighting, Oblique Lighting is defined as "using a light source positioned at a low angle. Oblique lighting is usually used to show detail by creating shadows on the surface of the evidence." Hope this helps.
Janice is roller skating at a constant speed away from her house. The first half of the street is flat, but the second half has a steep upward hill. Janice moves more slowly as she skates up the hill. Which graph shows Janice's position as she roller skates away from her house?
Answer:
Janice is roller skating at a constant speed away from her house. The first half of the street is flat, but the second half has a steep upward hill. Janice moves more slowly as she skates up the hill. Which graph shows Janice's position as she roller skates away from her house?
Explanation:
The chart shows the percentage of different elements in the human body.
Which element is the most prevalent in the human body?
nitrogen
hydrogen
carbon
oxygen
A car starts from rest and accelerates at 15 m/s2 for 3.0 s. What is its top speed?
Answer:
45m/s
Explanation:
V=t*a =15*3= 45m/s
A 438 gram ball is traveling east at 39 m/s when it is hit by a 2.4 kg softball bat. After being in contact with the bat for 302 ms, the ball rebounds at a speed of 28 m/s.
Determine the impulse vector (magnitude and direction) in kg*m's felt by the bat. Treat east as the positive direction.
Answer:
The magnitude of the impulse vector of the bat is 29.346 kg.m/s
The direction of the impulse vector of the bat is in the initial direction of the ball before impact
Explanation:
The given parameters are;
The mass of the ball, m₁ = 438 g
The speed of the ball = 39 m/s
The mass of the softball bat = 2.4 kg
The time of contact = 302 ms = 0.302 seconds
The speed of rebound = 28 m/s
The impulse = The change in momentum = Δp = F × Δt = m × Δv
The impulse on the ball = m₁ × Δv = 0.438 × (39 - (-28)) = 29.346 kg·m/s
Given that force of reaction of the bat is in opposite direction but equal to the force of the ball, and the time and the duration of contact with the ball is the same for both the ball and the bat, the impulse vector ore equal and opposite
Therefore, the magnitude of the impulse vector of the bat = 29.346 kg.m/s
The direction of the impulse vector of the bat = The initial direction of the ball before impact.
STATION
Solving Equations
A girl pushes on a box with a mass of
42 kg and it moves at an acceleration
of 7m/s2. With what force does the
girl push on the box?
J. 6 N
K. 35 N
L. 49 N
M. 294 N
Someone please answer it’s due today and I am so confused
The force used by the girl in pushing the box is 294 Newtons.
Hence, option M) 294N is the correct answer.
What is force?Force is simply a push or pull capable of changing the state of rest or motion of an object.
From Newton's second law of Motion;
F = ma
Where m is mass of object and a is acceleration.
Given the data in the question;
Mass of box m = 42kgAcceleration a = 7m/s²Force applied F = ?We substitute our given values into the expression above.
F = ma
F = 42kg × 7m/s²
F = 294kgm/s²
F = 294N
The force used by the girl in pushing the box is 294 Newtons.
Hence, option M) 294N is the correct answer.
Learn more about force here: https://brainly.com/question/27196358
#SPJ2
Which of the following best describes the circuit shown below?
A. Parallel
B. Open
Ο Ο
C. Short
O
D. Series
Answer:
A..............hope it will help you
At the top of a hill that is 4.37 meters high, a 70 kg skate boarder has 3000 1 point
joules of potential energy. What is his speed at the bottom of the hill where
his potential energy is zero?
Answer:
9.26m/s
Explanation:
Given parameters:
Height of the hill = 4.37m
Mass of skate boarder = 70kg
Potential energy = 3000J
Unknown:
Speed at the bottom of the hill = ?
Solution:
At the bottom of the hill, the total potential energy is the same as the kinetic energy.
Potential energy = Kinetic energy
mgh = [tex]\frac{1}{2}[/tex]mv²
2mgh = mv²
v² = 2gh
v = √2gh
g is the acceleration due to gravity
h is the height
v = √2 x 9.8 x 4.37 = 9.26m/s
The coefficient of friction between the wheels of a 2500 kg Hearse and the dry pavement is 0.85. Determine the acceleration that the car experiences while skidding to a stop.
Answer Calculate the centripetal force exerted on a 900 kg car that negotiates a 500 m radius curve at 25.0 m/s. Assuming an unbanked curve, find the minimum static coefficient of friction, between the tires and the road, static friction being the reason that keeps the car from slipping (see Figure 2). Strategy and Solution for Part 1
NEED HELP!?Which of the following combinations would result in the greatest acceleration?
A 60N & 2.0kg
B 1N & 0.20kg
C 5N & 0.35 kg
D 12N and 1.0 kg
Answer:
The greatest acceleration is presented in option A 60N & 2.0kg
Explanation:
The second Newton's law relates the net force F exerted on an object of mass m and the acceleration it has by the equation:
F=m.a
The acceleration is found by solving the equation for a:
[tex]\displaystyle a=\frac{F}{m}[/tex]
Let's compare the different options and choose the greatest acceleration.
A F= 60 N, m= 2 Kg.
[tex]\displaystyle a=\frac{60}{2}=30\ m/s^2[/tex]
B F= 1 N, m= 0.20 Kg.
[tex]\displaystyle a=\frac{1}{0.2}=5\ m/s^2[/tex]
C F= 5 N, m= 0.35 Kg.
[tex]\displaystyle a=\frac{5}{0.35}=14.29\ m/s^2[/tex]
D F= 12 N, m= 1 Kg.
[tex]\displaystyle a=\frac{12}{1}=12\ m/s^2[/tex]
The greatest acceleration is presented in option A 60N & 2.0kg
The head of a 245 g golf club traveling at 62 m/s just before it strikes a 48 g golf ball at rest on a tee. After the collision, the club travels in the same direction at 43 m/s. Use the law of conservation of momentum find the speed of the golf ball just after impact.
Answer:
The speed of the golf ball just after impact is 96.98 m/s
Explanation:
Given;
mass of the club, m₁ = 245 g = 0.245 kg
initial velocity of the club, u₁ = 62 m/s
mass of the golf ball, m₂ = 48 g = 0.048 kg
initial velocity of the golf ball, u₂ = 0
final velocity of the club, v₁ = 43 m/s
let the final velocity of the golf ball
Apply the law of conservation of momentum;
m₁u₁ + m₂u₂ = m₁v₁ + m₂v₂
0.245(62) + (0.048 x 0) = 0.245(43) + 0.048v₂
15.19 = 10.535 + 48v₂
15.19 - 10.535 = 48v₂
4.655 = 48v₂
v₂ = 4.655 / 0.048
v₂ = 96.98 m/s
Therefore, the speed of the golf ball just after impact is 96.98 m/s
. TRUE OR FALSE: ALL THE FOOD WE EAT TODAY STARTED OUT AS WILD VERSIONS.
Answer:
i believe its true
Explanation:
i hope this helps
Answer:
maybe true
Explanation:
if we eat good then we will stay healthy
A circuit is made up of a bar magnet, a wire coil, an ammeter and connecting
wires. Which part could you exclude from the circuit and still have a working
electromagnet?
A. The wire coil
B. The bar magnet
O
C. The connecting wires
D. The ammeter
Answer: the ammeter
Explanation:
Answer:
The answer is D. The ammeter.
Explanation:
I took the quiz.
What type of motion does an object have if it is falling with terminal velocity ?
Answer:
I believe force :|
Explanation:
A sound wave is produced in a metal cylinder by striking one end. Which of the following occurs as
the wave travels along the cylinder?
a. Its frequency increases
b. It transfers matter
C. It transfers energy
d. Its amplitude increases
Answer:
C. It transfers energy
Explanation:
As the metal cylinder is strike at one end, energy is being transferred.
A wave is a disturbance that transmits energy from one point to another. All waves are prominent for their energy transfer potentials. Waves do not move materials of the medium. The frequency of the wave does not increases same with the amplitude. The most important thing about a wave is the ability to transmit energy_______________________________ gives the people with intellectual disabilities a chance to develop their self confidence and compete with others with similar interests.
Group of answer choices
Summer Olympics
Winter Olympics
Special Olympics
Paralympic Games
Answer:
special Olympics its the correct answer
why can you hear a mans voice around the corner of a building even if you can't see him
Answer:
A. Diffraction
Explanation:
You can immedietly mark out C and D, they make no sense. And reflection is the bending of light, leaving you with A. Diffraction
You marked this question as mathematics even though it belong in physics, please try to categorize it accordingly next time.
May I have brainliest please? :)
Answer:
A. Diffraction
Explanation:
Ape.x
Una larga fanja de pavimento tiene marcas a intervalos de 10m. Los estudiantes usan cronometros para registrar los tiempos en que un automovil pasa por cada marca. Asi han obtenido los datos siguientes: Distancia,m l 0 l 10 l 20 l 30 l 40 l 50 l Tiempo,s l 0 l 2.1 l 4.2 l 6.3 l 8.4 l 10.5 l A) Cual es la rapidez media del vehiculo? B) Al cabo de cuanto tiempo la distancia es igual a 34m? C) Cual es la aceleracion del automovil?
Answer:
men
Explanation:
anyone have the answers lol ????
Answer:
I do have the answer
Explanation:
What could you do to increase the electric potential energy between two
positively charged particles by a factor of 16?
Answer:
Increase the charge of one particle by a factor of 16
Explanation:
(Repost) I need this answer ASAP!
See the attached picture.
The sentences have been carefully dragged to the right places.