Answer:
okay sooo the weight is: 294 n
the normal force is 286 n
the acceleration is: -0.38 m/s²
Answer:
294 n
286 n
-0.38 m/s²
Explanation:
A 150 g baseball is thrown with a speed of 20 m/s. After the ball hits the bat, the ball moves 40 m/s.
What is the momentum before it hits the bat?
What is the momentum after it hits the bat?
Answer:
3000 kg*m/s
6000 kg*m/s
Explanation:
p = m*v
p = 150kg*20m/s
p = 3000 kg*m/s
p = 150kg*40m/s
p = 6000 kg*m/s
If there are 6 coulombs of charge moving through a wire in 2 seconds. How many amps are moving through this wire?
Answer:
Current = 3 Amperes
Explanation:
Given the following data;
Quantity of charge = 6 C
Time = 2 seconds
To find how many amps are moving through this wire;
Mathematically, the quantity of charge passing through a conductor is given by the formula;
Quantity of charge = current * time
Substituting into the formula, we have;
6 = current * 2
Current = 6/2
Current = 3 Amperes
State three differences between solid friction and viscosity
Which of the following statements is false?
A. Scalar quantities have size or magnitude only
B. Vector quantities have both magnitude and direction
C. Mass, length and time are all scalar quantities
D. Distance, velocity and acceleration are all vector quantities
Answer:
I think it might be c.
Explanation:
Hope it's right :3
If we keep on applying force on a material object, can it gain speed of light?
Answer:
As an object moves faster, its mass increases. ... Because masses approach infinity with increasing speed, it is impossible to accelerate a material object to (or past) the speed of light. To do so would require an infinite force.
What can cause electricity to jump across a gap
Answer:
It often happens in a circuit which was conducting,and a switch is opened. Any inductance in the circuit will help the voltage increase due to back emf,and this can cause breakdown of the air insulation and an arc can form.
Explanation:
Convert 0.4 cm to km.
Which would increase the speed of a sound wave?
- A wave passes from a solid to a liquid while remaining the same temperature.
- The medium increases in temperature while remaining in the same phase.
- The medium decreases in temperature while remaining in the same phase.
- A wave passes from a liquid to a gas while remaining the same temperature.
Answer:
B. The medium increases in temperature while remaining in the same phase
Explanation:
Good luck on all your tests and Exams!
The sound wave will increase when the medium increases in temperature while remaining in the same phase.
What is a sound waves?Sound waves are composed of compressions and rare factions. Sound is a mechanical wave hence it moves by the vibration of air particles.
As such, the sound wave will increase when the medium increases in temperature while remaining in the same phase.
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Questions:
1. A piano is moved up a ramp that is 3 m long with a force of 5
N. What is the work done on the piano? What is the name of the
simple machine for "ramp”? (6)
Formula
Show your steps (with
units)
Answer (with units)
Sentence
Simple Machine
Answer:
Workdone = 15 Nm
Explanation:
Given the following data;
Length of ramp (distance) = 3 m
Force = 5 N
To find the work done on the piano;
Mathematically, work done is given by the formula;
Workdone = force * distance
Substituting into the formula, we have;
Workdone = 5 * 3
Workdone = 15 Nm
II. The name of the simple machine for "ramp” is an inclined plane.
Typically, an inclined plane has a flat supporting surface that is set at an angle with an end higher than the other and it can be used to lift or lower an object.
The work done to lift a 3kg mass to a
height of 10 m is
Answer:
The answer is 300Joules
10. Inertia causes your books on the car seat to continue moving forward even after you brake. TrueFalse 11. Tires with little or no tread do not have good traction on a wet, snowy, or icy road. TrueFalse 12. When driving on ice and snow, traction is poorest when the temperature is near 32 degrees F. TrueFalse 13. The more energy of motion that a car has, the less time and distance it will take to stop. TrueFalse 14. To help slow a car using engine braking, just take your foot off the accelerator. TrueFalse
10. True
11. True
12. True
13. False
14. False
Hope this helps!!
55 points question
please put the answer in order by up to down
please help me
Answer:
animal and plant
Explanation:
1st is animal
mitochondria
cell membrane
nucleus
endoplasmic reticulum
golgi body
plant cell
cell wall
cell membrane
chloroplast
nucleus
vacuole
endoplasmic reticulum
mitochondria
golgi body
Compared to the image which drawing is the closest
Answer:
The one on the left
Explanation:
Answer:
The one on the left
Explanation:
A car is moving with a uniform speed of 12.0 m/s along a straight path . What is the distance covered by the car in 20 seconds ?
Answer:
Explanation:
This one-dimensional equation is just a fancy way of saying d = rt. Filling in:
d = 12.0(20) so
d = 240 m
what is the definition for speed?
Explanation:
the rate at which someone or something moves or operates or is able to move or operate.
Which type of training will improve muscular strength?
A.lifting light weights many times
B.lifting heavy weights every day
C.lifting heavy weights with few repetitions
Answer:
C
Explanation:
Lifting heavy weights every day
Please answer as if you're teaching someone who has no knowledge of the subject, thank you.
Answer:
(C) 700 N
Explanation:
The given parameters are;
The mass of the mountain climber, m = 100 kg
The angle formed by the rope with the horizontal, θ = 45°
The gravitational field strength, g = 10 N/kg
The weight of the man, W = m × g
∴ W = 100 kg × 10 N/kg = 1,000 N
At equilibrium, we have;
The downward force, the weight of the man, W = The upward force, the vertical component of the tension on the two halves of the rope
We have;
W = T × sin(θ) + T × sin(θ)
∴ 1,000 N = 2 × T × sin(45°)
Therefore, we have;
T = 1,000 N/(2 × sin(45°)) = 707.106781 Newtons
Therefore, the tension in the rope is closest to (approximately) 700 N.
What is a frequency in physics ?
Answer:
Frequency, in physics, the number of waves that pass a fixed point in unit time; also, the number of cycles or vibrations undergone during one unit of time by a body in periodic motion.
Explanation:
Long hair in the laboratory setting must be
always neatly groomed and brushed.
1
held away from the experiment.
tied back.
2
cut short.
3
The most appropriate measure is to tie back long hair to ensure it is safely secured and kept away from the experiment. The best answer is 3) tied back.
In laboratory settings, long hair poses a potential safety hazard due to the risk of hair getting tangled in equipment, chemicals, or flames. Therefore, it is important to tie back long hair to prevent it from coming into contact with hazardous substances or interfering with experiments.
1) Always neatly groomed and brushed and
2) held away from the experiment are good practices for general hygiene and cleanliness but may not adequately address the safety concern related to long hair in a laboratory setting.
4) cut short is not necessary as long as the hair is properly tied back and secured to minimize the risk of interference or contact with hazardous materials.
Thus, the most appropriate measure is to tie back long hair to ensure it is safely secured and kept away from the experiment. The best answer is 3) tied back.
To know more about the experiment concern:
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In which direction does the frictional force act on the cube? A) upwards B) downwards C)in all the directions D) side to side
Answer:
D) side to side
Explanation:
The frictional force act on the cube in the side to side direction. The friction force acts opposite to the direction of the motion of an object which reduces its speed or sometimes prevent it from moving from one place to another. In order to reduce the force of friction, the body has to move by rolling instead of sliding and use of lubrication on the surface on which the object moves.
Describe the mathematical relationship between the gravitational
potential energy of an object and its height above a reference point.
Answer:
∆p.e = mg∆h
Explanation:
Take height reference be h1 while height final be h2.
∆h = (h2 - h1)
m = m
g = g
•°• ∆p.e = mg(h2 - h1)
=> ∆p.e = mg∆h
The relationship between the equilibrant and the resultant vector is *
the equilibrant is equal in magnitude and in diredction
the equilibrant is equal in magnitude but opposite in direction
the equilibrant is different in magnitude and in direction
the equilibrant is different in magnitude but opposite in direction
Answer:
the equilibrant is equal in magnitude but opposite in direction.
Explanation:
In vector algebra, a resultant vector is a single vector that have the same effect as the effect of the net or algebraic sum of two or more vectors.
A resultant vector arises from finding the adding multiple vectors together.
When a group of vectors is replaced by a resultant vector, in order to keep the system of vectors at equilibrium, there is another vector which has the same magnitude as the resultant vector but acting in opposite direction to the resultant vector. This vector is called the equilibrant.
A 1234 kg freight car moving at 6 m/s runs into a 2468 kg freight car at rest. They stick together upon collision. What was the final combined speed?
Answer:
2 m/s
Explanation:
Applying,
The law of conservation of momentum
Total momentum before collision = Total momentum after collision
mu+m'u' = V(m+m')............... Equation 1
Where m = mass of the first freight car, m' = mass of the second freight car, u = initial velocity of the first freight car, u' = initial velocity of the second freight car, V = final combined velocity/ speed.
make V the subject of the equation
V = (mu+m'u')/(m+m')........... Equation 2
From the question,
Given: m = 1234 kg, m' = 2468 kg, u = 6 m/s, u' = 0 m/s (at rest)
Substitute these values into equation 2
V = [(1234×6)+(2468×0)]/(1234+2468)
V = 7404/3702
V = 2 m/s
Which type of electromagnetic waves have the highest energy?
ultraviolet waves
visible light waves
gamma rays
infrared waves
Answer:
Gamma rays
Explanation:
gamma rays have the highest energy and the shortest wavelength
what type of object is called object at rest ? Write with example.
Answer:
ln physics, Rest is the state at which an object is stationary or not moving with respect to its surroundings, and is said to be at rest. An example would be a book lying on a table.
Answer:
When an object does not change it's position with respect to time it is said to be at rest.
Explanation:
Example- A person sitting on a chair or a book lying on a table.
Please note there is no such thing as absolute rest.
Take the example of a person A sitting in a moving bus. If the observer is in the bus then to him person A is at rest. However if the observer is is outside the bus then person A is in motion as the bus is moving.
Please mark me as brainliest.
38. Joey set a school record for running the 200 m race. He completed the distance in
20.6s. What was his average speed?
Answer:
9.7 miles per second
Explanation:
divide 200 by 20.6
How do sports play a role in American Culture? Is this different from how sports play a role in other cultures?
PLEASE ANSWER QUICKLY!!!
Answer: American sports culture has a much greater appreciation of and emphasis towards collegiate and high school sports. This may be the strongest difference between American sports culture and every other countries' sports culture.
Which grouping describes only the living part of an ecosystem?
A. environment
B .niche
C. community
D. habitat
a boy throws a ball straight up into the air. it reaches its highest point after 4 seconds.how fast was the ball going when it left the boy's hand
Answer:
Explanation:
The most important thing to remember about parabolic motion in physics is that when an object reaches its max height, the velocity right there at the highest point is 0. Use this one-dimensional motion equation to solve this problem:
v = v₀ + at and filling in:
0 = v₀ + (-9.8)(4.0) **I put in 4.0 for time so we have more than just 1 sig fig here**
0 = v₀ - 39 and
-v₀ = -39 so
v₀ = 39 m/s
Desde un globo se deja caer un objeto ¿Que velocidad tendra y que distancia habra caido al cabo de 12 segundos?
Answer:
velocidad = -117.6 m/s
Al cabo de 12 segundos, la distancia que el objeto habra caido es 705.6 m
Explanation:
Sabemos que un objeto que está en el aire es atraído por la fuerza gravitatoria. Si ignoramos fuerzas como la fricción del aire, entonces la aceleración del objeto será solamente la aceleración gravitatoria, que sabemos que es 9.8m/s^2
Entonces la aceleración del objeto es:
A(t) = -9.8m/s^2
Donde el signo menos se debe a que esta aceleración es hacia abajo.
Para obtener la velocidad, integramos sobre el tiempo:
V(t) = ( -9.8m/s^2)*t + V0
Donde V0 es la velocidad inicial, como el objeto se deja caer, la velocidad inicial es cero, entonces tenemos:
V(t) = ( -9.8m/s^2)*t
Para la posición integramos nuevamente:
P(t) = (1/2)*( -9.8m/s^2)*t^2 + P0
donde P0 es la posición inicial, en este caso podemos definir la posición inicial como cero, solo por comodidad, entonces la posición se escribe como:
P(t) = (1/2)*( -9.8m/s^2)*t^2
Ahora queremos saber:
La velocidad del objeto al cabo de 12 segundos. Acá simplemente reemplazamos t por 12s en la ecuación de la velocidad, así obtenemos:
V(12s) = ( -9.8m/s^2)*12s = -117.6 m/s
También queremos saber la distancia que ha caído al cabo de 12 segundos.
Esto es igual a la diferencia entre la posición para t = 12s y la posición para t = 0s
P(12s) - P(0s) = (1/2)*( -9.8m/s^2)*(12s)^2 - (1/2)*( -9.8m/s^2)*(0s)^2
= -705.6 m
Esto significa que el objeto ha caído 705.6 metros al cabo de 12 segundos.