Answer:
m = 74.44 kg
Explanation:
p = m × v
670 = m × 9
9m = 670
m = 670/9
m = 74.44 kg
Momentum of an body is defined as the product of mass and velocity.It s unit is kgm/sec.The value of mass will be 74.44 kg.
What is momentum?The measurement of mass in motion is called momentum. Momentum is equal to its mass multiplied by its velocity. Mathematically it is given as;
Momentum = Mass x Velocity
The given data in the problem will be
p is the momentum of runner=670 kgm/sec.
v is the velocity =9m/sec.
m is the mass =?
[tex]\rm p =mv\\\\\rm m =\frac{p}{v} \\\\\rm m =\frac{670}{9} \\\\\rm m =74.44 kg[/tex]
Hence the value of mass will be 74.44 kg.
To learn more about the momentum refer to the link;
https://brainly.com/question/4956182
Which of the following scenarios demonstrates a transfer
between kinetic energy and potential energy?
Answer:
what scenarios? but kinetic is energy in motion (like a ball rolling) and potential is stored energy (ball laying on ground)
example (kinetic to potential) : baseball flying and and lands on the ground then stops rolling
roller coaster rolling down a hill then stopping (kinetic to potential)
roller coaster on top of a hill and then going down (potential to kinetic)
Explanation:
D.
because the time is used up due to irrelevant and unnecessary topics
& Every time your group conducts a meeting, nothing is accomplished
that intervene the discussion.
As the group leader, how will you keep your members focused on the
agenda of the meeting using the restriction strategy?
A. Tell them that they will get kicked out from the group if they will
B. End the meeting immediately as soon
as the group begins to
talk about other things irrelevant to the agenda.
c. Give instructions before the meeting starts to confine and limit
what they can say.
D. Show disappointment.
not cooperate.
Answer:
b because I took the quiz
of the following states of motion, the one which requires balanced forces is:
A: a decrease in speed in a straight line
B: an increase in speed in a straight line
C: constant speed in a straight line
D: a change in the direction of the motion
A balanced force is required for a change in the direction of the motion.
What is a force?According to Newton's second law of motion, the force applied to a body is directly proportional to the product of mass and acceleration of the body.
Balanced forces
Balanced forces are those that are opposite in direction and equal in size. When forces are balanced there is no change in direction.
Thus, when there is change in direction, a balance force can be applied to cancel the change in direction of motion.
Learn more about balanced forces here: https://brainly.com/question/485828
1. Find the momentum of an object of mass 5 kg with a velocity of 2 m/s. *
a. 2.5 kg.m/s
O b. 10 kg.m/s
c. 0.25 kg.m/s
d. 20 kg.m/s
Answer:
10kgm/s
Explanation:
Momentum = Mass * Velocity (both in standard units)
Momentum = 5 * 2 = 10kgm/s
Can an object with acceleration of zero be in motion?
Answer:
NO
Explanation:
if it has no acceleration then it's not moving
Answer:
Yes when the velocity is constant then the acceleration is said to be zero. Thus an object with 0 acceleration can be in motion.
Let me give you an example to make you more clear
Example:
When a car is traveling at a constant 90 km/h in a straight line has nonzero velocity and zero acceleration.
When we stretch a spring, which two factors affect how much elastic
potential energy is stored in it
What is the momentum of a 8 kilogram cart moving with a speed of 12 meters per
second?
Answer:
Explanation:
momentum = mv
m = 8 kg
v = 12 m/s
momentum = 8 * 12 = 96 kg m/s
Which force is an attractive force that is affected by the masses of objects?
A) tension force
B) magnetic force
C) normal force
D) gravitational force
Class: Physical Science B
Answer:
D) gravitational force
explain the oscillations or motion of both types of waves
What are all of the physics rules?
Answer:
f this bs
Explanation:
no i will not answer this
Answer: PLEASE GIVE BRIANLIEST
1. Archimedes Principle
2. Avogadro’s Law
3. Ohm's Law
4. Newton’s Laws (1642-1727)
5. Coulomb’s Law (1738-1806)
6. Stefan’s Law (1835-1883)
7. Pascal’s Law (1623-1662)
8. Hooke’s Law (1635-1703)
9. Bernoulli's Principle
10. Boyles's Law
11. Charles's Law
12. Kepler's Law
13. Law of conservation of energy
14. Tyndall effect
15. Graham’s Law
A construction crane is on top of a skyscraper which has height 45m. The crane itself is 10m in height. What is the gravitational potential energy in joules of a 60kg worker who is standing on top of the crane? (Use g=9.81 in your calculations)
Answer:
32340J
Explanation:
Given parameters
Height of skyscraper = 45m
Height of crane = 10m
Mass of worker = 60kg
g = 9.81m
Unknown:
Gravitational potential energy = ?
Solution:
The gravitational potential energy of a body is the energy due to the position of the body.
It is expressed as:
G.P.E = mgh
m is the mass
g is the acceleration due to gravity
h is the height = 45 + 10 = 55m
G.P.E = 60 x 9.8 x 55 = 32340J
Which of the following are common forms of energy released by electrons dropping from heightened energy levels?
Answer:
C. Light, Kinetic
Explanation:
The options:
A) Light, Heat
B)Motion, sound
C)Light, Kinetic
D)Heat, Potential
Answer:
A) Light, Heat
Explanation:
Tell me if im wrong!
A car's velocity changes from 40 m/s to 30 m/s in 40 seconds. What is the
acceleration of the car?
Answer:
- 0.25m/s²
Explanation:
Given parameters:
Initial velocity = 40m/s
Final velocity = 30m/s
Time taken = 40s
Unknown:
Acceleration of the car = ?
Solution:
Acceleration is the rate of change of velocity with time.
So;
Acceleration = [tex]\frac{Final velocity - Initial velocity }{time }[/tex]
Acceleration = [tex]\frac{30 - 40}{40}[/tex] = - 0.25m/s²
This implies that the car will decelerate at a rate of 0.25m/s²
This figure shows a
O a. transverse wave
O c. electromagnetic spectrum
Ob. decibel scale
Od compressional wave
Answer:
transverse i think
Explanation:
The acceleration due to gravity is 9.81 m/s2, towards the Earth. Rain falling from an altitude of 9,000 m would fall for about 1.5 minutes before hitting the ground (ignoring air resistance). What would be the final speed of a raindrop by the time it reaches the ground?
Answer:
the final speed of the rain is 541 m/s.
Explanation:
Given;
acceleration due to gravity, g = 9.81 m/s²
height of fall of the rain, h = 9,000 m
time of the rain fall, t = 1.5 minutes = 90 s
Determine the initial velocity of the rain, as follows;
[tex]h = ut + \frac{1}{2} gt^2\\\\9000 = 90u + \frac{1}{2} (9.8)(90)^2\\\\9000 = 90u + 39690\\\\90u = -30690\\\\u = \frac{-30690}{90} \\\\u = -341 \ m/s[/tex]
The final speed of the rain is calculated as;
[tex]v^2 = u^2 + 2gh\\\\v^2 = (-341)^2 + 2(9.8\times 9000)\\\\v^2 = 292681\\\\v = \sqrt{292681} \\\\v = 541 \ m/s[/tex]
Therefore, the final speed of the rain is 541 m/s.
Answer:
The magnitude of the final speed of a raindrop by the time it reaches the ground will be 541.45 m/s.
Explanation:
The final speed of the raindrop can be found using the following equation:
[tex] v_{f} = v_{0} - gt [/tex]
Where:
[tex]v_{f}[/tex]: is the final speed =?
[tex]v_{0}[/tex]: is the initial speed
g: is the acceleration due to gravity = 9.81 m/s²
t: is the time = 1.5 min
First, we need to find the initial speed:
[tex] y_{f} = y_{0} + v_{0}t - \frac{1}{2}gt^{2} [/tex]
Where:
[tex]y_{f}[/tex]: is the final height = 0
[tex]y_{0}[/tex]: is the initial height = 9000 m
Hence, the initial speed is:
[tex] v_{0} = \frac{y_{f} - y_{0} + \frac{1}{2}gt^{2}}{t} = \frac{0 - 9000 m + \frac{1}{2}9.81 m/s^{2}*(90 s)^{2}}{90 s} = 341.45 m/s [/tex]
Hence, the final speed is:
[tex] v_{f} = v_{0} - gt = 341.45 m/s - 9.81 m/s^{2}*90 s = -541.45 m/s [/tex]
Therefore, the magnitude of the final speed of a raindrop by the time it reaches the ground will be 541.45 m/s.
I hope it helps you!
A hiker walks with an average speed of 2.6 M Square what distance in kilometers does the hiker travel in a time of 2.8 hours
Answer:
The answer is "26.208 km"
Explanation:
Given value:
[tex]\to S= 2.6 \ \frac{m}{s}\\\\\to t= 2.8 \ hours[/tex]
Formula:
[tex]d= st\\\\d= 2.6 \times 2.8 \times \frac{60 \times 60}{1000}\\\\d= 26.208\ km[/tex]
Which best explains how thermal energy is transferred when someone holds a hand above a fire?
a) It is transferred by conduction and radiation.
b) It is transferred by only convection.
c) It is transferred by only conduction.
d) It is transferred by radiation and convection.
Pls place the words in the right place I'll give brainless and the points!
Explanation:
you measure temperature in degrees celsius using a thermometer. Thermal energy is measured in joules. A larger volume of water will take longer to heat up but will store more energy than the smaller object. However, a smaller object will lose it's heat faster than a larger object. A cup of tea has less thermal energy than a swimming pool.
Can anyone please help meee!!!
Answer:
The centripetal acceleration is given by
a = v 2 r = 10 2 25 = 4 m s − 2
Using Newton's Second Law, the centripetal force acting is
F = m a = 900 ⋅ 4 =3600 N
Explanation:
A stationary 10 kg object is located on a table near the surface of the earth. The coefficient of kinetic friction between the surfaces is 0.2. A horizontal force of 40 N is applied to the object.
Answer:
2.04m/s²
Explanation:
Complete Question
A stationary 10 kg object is located on a table near the surface of the earth. The coefficient of kinetic friction between the surfaces is 0.2. A horizontal force of 40 N is applied to the object. Find the acceleration of the object.
According to Newtons second law;
\sum F_x = ma_x
F_m - F_f = ma_x
Fm is the applied force
Ff is the frictional force
m is the mass
a is the acceleration
Substitute the given values
40N - nmg = 10a
40 - 0.2(10)(9.8) = 10a
40 - 19.6 = 10a
20.4 = 10a
a = 20.4/10
a = 2.04m/s²
Hence the acceleration of the object is 2.04m/s²
What is the definition of endothermic and exothermic?
pls help on a timer will give brainlist
Answer:
An exothermic process releases heat, causing the temperature of the immediate surroundings to rise. While an endothermic process absorbs heat and cools the surroundings
Explanation:
Answer:
Basically, endothermic feels cooler to touch than exothermic.
Explanation:
Endothermic reactions are just reactions that emit energy (in form of heat) to its surroundings. Exothermic ones, on the other hand, draw energy from its surroundings to occur.
Always think - "Endothermic is cool. Exothermic is not cool."
when a material absorbs energy from light the energy causes the material to do what?
Answer:
To change.
Explanation:
The Law of Conservation of energy states that energy cannot be destroyed but can only be transformed or converted from one form to another. For example, light energy to heat energy.
When a material absorbs energy from light the energy causes the material to change.
Why would a cell phone not make a sound in space?
Answer:
because there is no sound in space
Which part of the electromagnetic spectrum is typically used to make images based on the temperatures of objects?
X-rays
radio waves
infrared light
visible light
Answer:
Which part of the electromagnetic spectrum is typically used to make images based on the temperatures of objects?
X-rays
radio waves
infrared light<<<----- CORRECT
visible light
Explanation:
Edge 2021
Infrared light is typically used to make images based on the temperatures of objects.
What is meant by electromagnetic spectrum?The range of all EM radiation arranged from high to low frequency (short to long wavelength) according to their frequency or wavelength. is known as the electromagnetic spectrum (EM).
Here,
Similar to visible light, X-rays are a type of electromagnetic radiation. X-rays have a higher energy than light, on the other hand, and can penetrate most materials, including the human body.
Images of inside body tissues and structures are produced using medical x-rays.
Electromagnetic energy in the infrared region of the spectrum can be seen by them. There is a relationship between an object's temperature and the electromagnetic radiation it releases since infrared radiation is strongly related to object temperature.
Hence,
Infrared light is typically used to make images based on the temperatures of objects.
To learn more about electromagnetic spectrum, click:
https://brainly.com/question/15576247
#SPJ5
The speed of the wooden bar is changed so that the bar hits the water fewer times each second.
What happens to the frequency of the waves produced?
A. Increases
B. Does not change
C. Decreases
Answer:
c - the frequency of the waves decreases
3. A simple way to state Newton’s first law is:
For every action force, there is a _______A.________ _______B.________ equal in _______C.________ and opposite in _______D.________.
yall just fill in the blanks):
Explanation:
A simple way to state Newton's first law is:
For every action force, there is a reaction force which is equal in magnitude and opposite in direction.
Based on their locations on the periodic table, which two elements would you
expect to form positive ions with a +3 charge?
O A. Nitrogen, N
O B. Aluminum, Al
O C. Phosphorus, P
D. Boron, B
Answer:
i think it would be B. Aluminum, Al and D. Boron, B
Explanation:
since they're both in group 13 and they forms a 3+ ion
If a 2 kg spring is compressed by exerting a force of 10 newtons a distance of 50 cm how much work is done?
Emily roller skates with a constant speed
of 8 miles per hour. How far can she travel
in 3 hours? D = SxT
Answer:
She can travel 24 miles in 3 hours.
A squirrel starts at rest and accelerates at 2.3 m/s^2 for 5.22 seconds. What is it's final velocity?
Please provide the variable, number, and unit e.g., a= 1.34 m/s^2
Answer:
12.259 m/s
Explanation:
An object starting at rest and accelerating at a constant acceleration a for t seconds has a velocity of
[tex]v=at[/tex]
If we substitute in the values a = 2.3 m/s² and t = 5.22 s, we get a velocity of
[tex]2.3(5.22)=12.259[/tex] m/s