12. If you cut a wooden block in half, the density will:
A) decrease
C) stay the same
B) increase
D) not enough information
Answer:
The density will decrease over time
Explanation:
It is like when you cut cheese and leave it out for a day of two it is crusty on the outside but when you cut it in half and leave it out for the same amout of time it is even crustier than the whole one.
Hope this helps
please tell me if I'm wrong and i will try to correct my answer
How do the magnetic and electrical components of electromagnetic waves travel in relation to each other? at right angles toward each other in a circular motion parallel to each other
Answer: A
Explanation:
Answer:
it is a
Explanation:
Waves that make up the visible part of the electromagnetic spectrum have
Answer:
the visible part of the electromagnetic spectrum is somewhere between 2 and 10 1.24 eV and x rays 1 to 12 keV
Explanation:
the visible part of the electromagnetic spectrum is somewhere between 2 and 10 1.24 eV and x rays 1 to 12 keV
A car starts from rest down a straight, flat road and gets up to 22 m/s after 33 seconds.
a) Find acceleration.
b) How far did it go during this time?
Answer:
Explanation:
Acceleration = distance / time
= 22 / 33 = 2/3
The table shows experimental data of the magnitude of four forces exerted on a 2kg object as it slides across a horizontal surface. Which of the following could represent the magnitude of the net force that is exerted on the object? Select two answers.
Answer:
6N and 10N
Explanation:
The forces acting along the horizontal axis arw the horizontal force applied and the frictional force.
Frictional force is a force that opposes the horizontal force (moving force)
First we need to get the sum of force along the horizontal as shown
\sum Fx = Horizontal force - frictional force
\sum Fx = 8N - 2N
\sum Fx = 6N
Hence one of the magnitude of the net force exerted on the object is 6N
For the forces along the vertical component;
The forces are the weight, force of gravity(acting downward) and the normal force acting upward
Given
Weight = mass × acceleration die to gravity
Weight = 2×10 = 20N
Normal force = 10N
\sum Fy = (weight)-normal force
\sum Fy = (20)-10
\sum Fy = 20-10 = 10N
Hence the other net force acting on the object is 10N
The required options are 6N and 10N
According to the law of the conservation of momentum, what is the missing value in the chart?
A 4
B. 6
C. 10
D. 16
Answer:
B: 6
Explanation:
on edge! hope this helps!!~ （=´∇｀=）
PLS HELP
what’s acceleration of car if it accelerates from 5.0 m/s to 18.0 m/s in 5.4 s ? (2.4 m/s^2) ?
Which two chemists organized elements based on properties such as how the elements react or whether they are solid or liquid?
Lavoisier and Mendeleev
Döbereiner and Newlands
Newlands and Mendeleev
Lavoisier and Döbereiner
Answer:
The chemists that organized elements based on properties such as how the elements react or whether they are solid or liquid are Lavoisier and Dobereiner
Lavoisier basis of theory is on the various properties of metals, nonmetals and gases.
Dobereiner gave the law of triads. In this theory the middle element is the average of the other two elements.
Answer:
d. Lavoisier and Döbereiner
Explanation:
An object traveling at a constant velocity has no net force. True or False
Suppose that a particular artillery piece has a range of R=9240 yards. Find the range in miles
Answer:
5.25[mile]
Explanation:
We must remember that the yard is a measure of length of the imperial system and that a Mile is also a unit of length of that system.
Therefore we must use a conversion factor that relates the yard to the mile.
[tex]9240 [yard]*[\frac{0,000568182miles}{1yard} ]=5.25[miles][/tex]
1. During an accident investigation, a detective measures the skid marks that a car
left to determine how fast it was initially moving before stopping when it hit a
light pole. The detective measures the distance to be 40 meters. The detective
receives the car's braking acceleration to be 4.57m/s2 from the manufacturer's
manual. Help the detective by solving how fast the car was initially going before
he hit the light pole? Someone please help I’ll give you a brainlest
Answer:
19.12 m/s.
Explanation:
The following data were obtained from the question:
Final velocity (v) = 0 m/s
Breaking Acceleration (a) = – 4.57 m/s²
Distance (s) = 40 m
Initial velocity (u) =.?
The initial velocity of the car can be obtained as illustrated below:
v² = u² + 2as
0² = u² + (2 × –4.57 × 40)
0 = u² + (– 365.6)
0 = u² – 365.6
Collect like terms
u² = 0 + 365.6
u² = 365.6
Take the square root of both side
u = √365.6
u = 19.12 m/s
Therefore, the car was initially moving at 19.12 m/s.
When a bowling ball strikes a bowling pin which imparts a greater
force upon the other?
a. equal force b. The bowling ball
c. the bowling pin
When a bowling ball strikes a bowling pin, they impart equal forces upon the other.
The correct option is (a) Equal forces
Newton's third law of motion:Newton postulated that whenever objects A and B interact, they exert forces on one another. You put a downward force on the chair when you sit on it, and the chair responds by exerting an upward force on your body. This contact creates two forces: one force on the chair and one force on your body. These two forces—also known as the action and reaction forces—are covered by Newton's third law of motion. There is an equal and opposite response to every action, according to the formal statement of Newton's third law.There are always two forces acting on the two interacting objects, according to the statement's interpretation. The amount of the force known as the action and reaction forces—are covered by Newton's third law of motion. There is an equal and opposite response to every action, according to the formal statement of Newton's third law.There are always two forces acting on the two interacting objects, according to the statement's interpretation. The amount of the force exerted on the first and second objects are equal. In contrast to the force acting on the second item, the force on the first object is operating in the opposite direction. There are always two of the same kind of force pairings—equal and opposing action-reaction force pairs.Learn more about the Newton's third law with the help of the given link:
https://brainly.com/question/974124
#SPJ2
help me to answer this please
Answer:
ok
Explanation:
During a phase change, a substance undergoes a(n) *
HELP
reversible change from one state to another.
irreversible change to a different substance
irreversible change from one state to another.
reversible change to a different substance.
Answer:
Reversible change from one state to another
Hope this helps
:)
1.
In 10 seconds a car accelerates 4m/s? to 50 m/s.
How fast was the car going before it accelerated?
2.
Variables:
Equation and Solve:
In 10 seconds a car accelerates 4m/s2 to 50 m/s. How fast was the car going before it accelerated?
Answer:
i love devon bostick
Explanation:
cause....... i do
Answer: It was going 4 m/s
Explanation:
A man weighing 490N on earth weighs 81.7N on the moon.His mass on the moon is kg
His mass is 50 kg . . . on the Moon, on the Earth, in the capsule rocketing between them, and on Halley's comet if he ever goes there.
Answer:
50kg
Explanation:
The mass of a man on the Earth and the moon is the same, so we only need to use the 490N weight on Earth.
The formula for mass is m=w/g. Plugging in the values, we can determine that m=490N/9.8m/s^2. (g is gravitational constant, which is approximately 9.8m/s^2 on Earth)
The reason that the unit in the answer is in kg is because one newton (N) is 1kg*m/s^2. The m/s^2 is cancelled out by the m/s^2 in the gravity constant, so it leaves kg.
m=50kg
Explain experimental physics.
Answer:
This is a category of physics dealing with the observable phenomena, and experimental aspects by investigation, and scientific testing to measure the properties of matter, and energy.
Answer:
Experimental physics is the category of disciplines and sub-disciplines in the field of physics that are concerned with the observation of physical phenomena and experiments.
I hope you helped^_^
Follow me for more answersWhich option gives an object's mass in SI units? O A. 8.1 m3 OB. 4.6 lb O C. 5.2 kg O D. 6.5K
Answer:
5.2kg
Explanation:
mass is measured in kilograms
therefore its si unit is kg
You are driving from Seattle to Portland, a distance of 174
miles (280,000 meters). Since most of your journey is on 1-5, your average
speed will be 65MPH, or 30 meters per second. How long does it take you
to get to Portland? Select the BEST answer from the ones listed below.
3 hours 4 minutes
2 hours 20 minutes
2 hours 35 minutes
2 hours 15 minutes
Answer:
driving distance = 174 miles
The distance by car is 278 km. Follow the Seattle to Portland driving route along I-5 S. Get driving directions from Seattle to Portland.
flight distance = 145 miles
Explanation:
3. A cat is moving at 18 m/s when it accelerates at 4 m/s2 for 2 seconds. What is
his new velocity?
Answer:
v=u+at
v=8+(4x2)
v=16m\s2
Question 3 (1 point)
Select the best answer from the choices below. When the wavelength decreases, the frequency.
a
Increases
Оооо
Decreases
Remains the same
с
d
Stops
Explanation:
the frequency remains the same
Explain Kinetic and potential energy
Answer:
Energy implies as the object’s capability to perform work. It is something that cannot be created or destroyed but can only be transformed. An object loses its energy, when it performs work, whereas it gains energy when the work is performed on it. Energy is broadly classified as kinetic energy and potential energy. While kinetic energy is the energy which an object contains because of a particular motion.
On the other hand, potential energy is the stored energy, because of its state of rest. As both the two forms of energy are measured in joules, people get easily confused between these two. So, take a read of the article which will help you to understand the differences between kinetic and potential energy.
Explanation:
Hope this helps - Good luck ^w
Answer:
Energy stored in an object due to its position is Potential Energy. · Energy that a moving object has due to its motion is Kinetic Energy.
Explanation:
what is the number pattern for 7 12 17 22
Answer:
add 5 each number
Answer:
Increase by 5 each time.
Explanation:
Help please like I mentioned before I suck at physics
Answer:
.20 m/s
Explanation:
hope it helps
A plate moves 200 m in 10,000 years. What is its rat in cm/year
Answer:
2cm/year
Explanation:
20000/10000=2cm/year
What is the fastest speed at which a tennis ball can cross the net horizontally and still land in the court? From the net to the end line is 12 m, and the height of the net is 1 m. Neglect air resistance and spin on the ball.
A. 0.04 m/s
B. 27 m/s
C. 53 m/s
D. 45 m/s
self note *6
Answer:
B. 27 m/s
Explanation:
The horizontal velocity of the ball is 27 m/s
The given parameters;
horizontal distance, x = 12 mheight of the net, h = 1 mThe time of motion is calculated as;
h = ut + ¹/₂gt²
1 = 0 + (0.5 x 9.8)t²
1 = 4.9t²
[tex]t^2 = \frac{1}{4.9} \\\\t^2 = 0.205\\\\t = \sqrt{0.205} \\\\t = 0.45 \ s[/tex]
The horizontal velocity of the ball is calculated as;
X = uₓt
[tex]u_x = \frac{X}{t} = \frac{12}{0.45} = 26.7 \ m/s \ \approx 27 \ m/s[/tex]
Thus, the horizontal velocity of the ball is 27 m/s
Learn more here:https://brainly.com/question/9606019
How much energy does a 50kg rock have if it sitting on the edge of a 15m cliff
Answer:
14715 joules
Explanation:
Which of the following is not a tectonic activity?
A.Volcanoes
B.Mountain Building
C.Erosion of mountains
D.Earthquakes
Answer:
Erosion of Mountains
Explanation:
Answer:
c gimme brainliest I'm right
Compare an object sliding across carpet and that same object sliding across a bare floor. Why is the object quicker to slow down on carpet than on the bare floor?
Please answer this!
Answer:
it is friction
Explanation:
is it possible that during the big bang the laws of physics changed?
Answer:
yes, so many answers to that like possibilities
Explanation:
i watch a movie
