Answer:
Dark matter?
Explanation:
Answer:
matter
Explanation:
The illustration shows a rollercoaster and indicates four different positions the car might be at as it moves along the track. At which point in the rollercoaster's journey is its potential energy the greatest?
Answer:
Point a
Explanation:
The potential energy of an object is given by :
P = mgh
m is mass, g is acceleration due to gravity, h is height above ground level.
Potential energy is directly proportional to the position of an object.
In the attached figure, the maximum height is shown at point (a). It means it will have maximum potential energy at a as compared to b,c and d.
What type of medium (solids, liquids, or gases) do sound waves travel fastest in?
Answer:
Gases
Explanation:
Gases molecules are farther apart than solids and liquids. :)
Why is it important to set a series of short-term goals?
It is positive self-talk.
It makes you feel guilty.
It forces you to exercise.
It ultimately helps you focus on your long-term goals.
Answer:
It ultimately helps you focus on your long-term goals
Explanation:
Answer:
Last option is the answer
Explanation:
So, to create an effective strategy to achieve your long term goals, you set several short term goals. Short terms goals act as a milestone in your journey to reach the long term goal of your life. They help you gauge how far you have come and how long you still have to travel to reach your ultimate destination.
Biological dad means
Answer:
Your real dad according to Science and your DNA codes.
Answer:
man who his sperm caused the baby to be conceived.
A smooth wooden 40.0 N block is placed on a smooth wooden table a force of 14.0N is required to keep the block moving at a constant velocity what is the coefficient of sliding friction between the block and the table top
Answer:
0.35 is the friction coefficient.
Explanation:
The equation for the friction coefficient is friction coefficient = force/normal force. The force required here is 14N, and the normal force is the weight, 40N. 14/40=0.35.
The coefficient of sliding friction between the block and the table top is 0.35
Given that a smooth wooden 40.0 N block is placed on a smooth wooden table a force of 14.0N is required to keep the block moving at a constant velocity.
The weight of the wooden block will produce a normal reaction N which is equal in magnitude to the weight. That is,
N = mg = 40N
The resultant force applied = ma = 14 N
Since the velocity is constant, acceleration a = 0
Resultant force = F - [tex]F_{r}[/tex]
where
F = force applied = 14 N
[tex]F_{r}[/tex] = Frictional force.
Substituting every parameters into the equation lead to
F - [tex]F_{r}[/tex] = ma
since a = 0, then,
F - [tex]F_{r}[/tex] = 0
F = [tex]F_{r}[/tex]
To calculate the coefficient of sliding friction between the block and the table top, we will make use of the formula
F = μN
Where μ = coefficient of friction.
substitute all necessary parameters into the formula
14 = 40μ
μ = 14/40
μ = 0.35
Therefore, the coefficient of sliding friction between the block and the table top is 0.35
Learn more about friction here: https://brainly.com/question/13821217
How does a concave mirror form an image?
when the reflected rays of the mirror meets
Explanation:
When two incident rays go and strike to the mirror, their reflected rays meet and image is formed
A concave mirror form an virtual and real image which depends on the distance of the object from the mirror.
What is Concave mirror ?A concave mirror is a type of mirror which has reflecting surface curved inside and away from the light source.
Image formed by Concave mirror depends on distance of the object from the mirror. when the object is in between principal point and principal focus then size of the object is enlarged and we get virtual and erect image. When object is on principal focus, size of the image is highly enlarged, real and inverted. When object is between center of curvature and focal point, the size of the image is enlarged, it is real and inverted. and when the object is on the center of curvature size of the image is equal to size of thee object, it is real and inverted.
Hence Concave Mirror form real, virtual and inverted image which depends on the distance of the object from the mirror.
To know more about Concave mirror, click :
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how many sig figs does 0.009 have?
if you punch a wall with a force of 30 N, what force will you feel on you fist? F= N
Answer:
Pain
Explanation:
MARKING BRAINLIEST: A 75.0 kg person rides up and down in an elevator that starts from rest, accelerates from rest to 2.0m/s in 2.0s, continues at a constant velocity of 2.0m/s for 2.0s, and then comes to a stop from 2.0m/s in 2.0s. Calculate what the scale would read in each of the following situations. Show all work including free-body diagrams. Round off g to 10 m/s2.
An Aichi D3A bomber, with mass of 3600 kg, departs from its aircraft carrier with a velocity of 85 m/s due east. What is the plane's momentum
Answer:
306000 is the answer.......
please please help i need to finish this test
A ball is thrown vertically upward with an initial velocity of 25 m/s. What is its velocity after 3 seconds in the air? (assume air resistance is negligible)
Answer:
-4.4 m/s
Explanation:
Since the ball is thrown upward, we can ignore the horizontal velocity. This means that the vertical velocity is 25 m/s. The vertical acceleration is -9.8 m/s^2 (g). This means that after 3 seconds, the velocity would've decreased by 9.8 m/s^2 * 3 s. This is 29.4 m/s.
This should be subtracted from the initial velocity:
25 m/s - 29.4 m/s = -4.4 m/s
Hope this helps!
A moving saw blade and wood are in contact and heat is produced from the kinetic energy and friction between the two objects. Describe all the possible places the RKE can transfer. Whats the answer
Answer:
The radiated heat from the kinetic energy is transferred speedily across the blade but not in the wood.
Explanation:
The moving saw blade is a metal and metals are very conductive as they have free valent electrons in their outermost shell. So the heat is transferred from the action point to the other end of the saw blade.
Unlike the saw blade, the wood is a poor conductor of heat and would slowly absorb the heat which may not translate the entire wood before the sawing is complete.
How does the range of a ground launched projectile change when the launch angle changes?
Answer:
Higher launch angles have higher maximum height
Since steeper launch angles have a larger vertical velocity component, increasing the launch angle increases the maximum height.
oof im crying rn like fr im ded
Answer:
no kap
Explanation:
At an ocean depth of 10.0m, a diver's lung capacity is 2.40L. The air temperature is 32.0°C and the pressure is 101.30 kPa. What is the volume of the diver's at the same depth, at a temperature of 21.0°C and a pressure of 141.20 kPa?
Answer: The volume of the diver's at the same depth, at a temperature of 21.0°C and a pressure of 141.20 kPa is 1.66 L
Explanation:
The combined gas equation is,
[tex]\frac{P_1V_1}{T_1}=\frac{P_2V_2}{T_2}[/tex]
where,
[tex]P_1[/tex] = initial pressure of gas = 101.30 kPa
[tex]P_2[/tex] = final pressure of gas = 141.20 kPa
[tex]V_1[/tex] = initial volume of gas = 2.40 L
[tex]V_2[/tex] = final volume of gas = ?
[tex]T_1[/tex] = initial temperature of gas = [tex]32.0^0C=(32+273)K=305K[/tex]
[tex]T_2[/tex] = final temperature of gas = [tex]21.0^0C=(21+273)K=294K[/tex]
Now put all the given values in the above equation, we get:
[tex]\frac{101.30\times 2.40}{305}=\frac{141.20\times V_2}{294}[/tex]
[tex]V_2=1.66L[/tex]
The volume of the diver's at the same depth, at a temperature of 21.0°C and a pressure of 141.20 kPa is 1.66 L
Technician A says that the cooling system should be tested for leaks using a pressure-operated pressure pump. Technician B says that the freezing and boiling point of the coolant can be tested using a thermometer. Who is right?
Answer:
The correct option is;
Technician A only
Explanation:
Leaks in the cooling system parts such as the radiator cap can be tested with a pressure operated hand pump by attaching the pump cap to the pump with an adaptor and apply pressure enough for there to be a release of pressure at the cap.
The pressure added to the system should be maintained for up to two minutes. If the pressure drops quicker, then there is likely to be leaks in the system
The freezing and boiling point of the coolant is measured with an antifreeze tester which carries the appropriate apparatus to measure the coolants freezing and boiling points.
you place a box weigthing 362 N on a inclunded plane that makes a 37.8 angel with a hirizontal. compute the componest of gravitational force acting down the inclined plane.
Answer:
W = 221.872 N
Explanation:
The weight of a box, F = 362 N
It makes an angle of 37.8 degrees with the horizontal.
We need to find the gravitational force acting down the inclined plane. The component of weight that is acting down the inclined plane is mgsinθ.
W = mgsinθ
= 362× sin(37.8)
= 221.87 N
So, the required component of gravitational force is 221.87 N.
I need help with these questions :
(see image )
[tex]\huge\boxed{Theta=25.67}[/tex]
_____________________________________DATA:Range = R = 78m
Initial Velocity = [tex]V_i[/tex] = 30m/s
Angle(theta) = ?
_____________________________________SOLUTION:The Range is given by,
[tex]R =\frac{V_0^2}{g}Sin2(theta)\\\\78 = \frac{30^2}{10}Sin2(theta)\\\\Sin2(theta) = \frac{780}{900}\\\\Sin2(theta) = \frac{13}{15}\\\\Sin(theta) = \frac{13}{30}\\\\theta = Sin^{-1}\frac{13}{30}\\\\theta = 25.67^0[/tex]
_____________________________________Best Regards,'Borz'Which of these is true about pure substances?
A. They can only contain one type of molecule.
B. They can contain different types of atoms and molecules.
C. They may contain one type of atom or one type of molecule.
D. They can only contain one type of atom.
Answer:
the answer is c bc to be pure it must be the same atom or molecule
A 20 kg mass is moving at 10 m/s and collides with a stationary 5 kg mass, transferring all its momentum in the collision, what will the velocity ( in m/s) be for the 5 kg ball after they collide?
Answer:
v = 40 [m/s].
Explanation:
Linear momentum is defined as the product of mass by Velocity. In this way, by means of the following equation, we can calculate the momentum.
[tex]P=m*v\\[/tex]
where:
m = mass [kg]
v = velocity [m/s]
[tex]P =20*10\\P =200 [kg*m/s][/tex]
Since all momentum is transferred, we can say that this momentum is equal for the mass of 5 [kg]. In this way, we can determine the speed after the impact.
[tex]v = P/m\\v = 200/5\\v = 40 [m/s][/tex]
Which event causes the formation of the electric current produced by the
photoelectric effect?
A. Electrons flow in waves from one atom to another when light
strikes them.
B. The waves of light cause electrons to flow in different directions
within an atom.
o
C. Electrons are knocked off the surface that the light strikes by
"particles" of light
D. Electrons are particles, so they flow through the air from a light
bulb to a metal surface.
SUBMIT
Answer:
C
Explanation:
Light with energy above a certain point can be used to knock electrons loose, freeing them from a solid metal surface, according to Scientific American.
photoelectric effect is the emission of electrons when electromagnetic radiation, such as light, hits a material
The event causes the formation of the electric current produced by the photoelectric effect is electrons are knocked off the surface that the light strikes by "particles" of light. Therefore, option C is correct.
What is photoelectric effect ?The term photoelectric effect is defined as the emission of electrons when electromagnetic radiation, such as light, hits a material. An electrons emitted in this manner are called as photoelectrons.
The photoelectric phenomenon in which electrically charged particles are released within a material when it attracts electromagnetic radiation.
The event causes the formation of the electric current produced by the photoelectric effect is electrons are knocked off the surface that the light strikes by "particles" of light.
Thus, option C is correct.
To learn more about photoelectric effect, follow the link;
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A 140 kg load is attached to a crane, which moves the load vertically. Calculate the tension in the
cable for the following cases:
a. The load moves downward at a constant velocity
b. The load accelerates downward at a rate 0.4 m/s??
C. The load accelerates upward at a rate 0.4 m/s??
Answer:
A.) 1372 N
B.) 1316 N
C.) 1428 N
Explanation:
Given that a 140 kg load is attached to a crane, which moves the load vertically. Calculate the tension in the cable for the following cases:
a. The load moves downward at a constant velocity
At constant velocity, acceleration = 0
T - mg = ma
T - mg = 0
T = mg
T = 140 × 9.8
T = 1372N
b. The load accelerates downward at a rate 0.4 m/s??
Mg - T = ma
140 × 9.8 - T = 140 × 0.4
1372 - T = 56
-T = 56 - 1372
- T = - 1316
T = 1316N
C. The load accelerates upward at a rate 0.4 m/s??
T - mg = ma
T - 140 × 9.8 = 140 × 0.4
T - 1372 = 56
T = 56 + 1372
T = 1428N
1. A train is traveling on a straight section of track at constant speed. In 60
seconds it covers a distance of 1800 meters. What is the speed of the
train?
Answer:
30 mph
Explanation:
1800 divided by 60
When an object travels at a constant speed with zero acceleration it is known as uniform rectilinear motion. Then its velocity is given by:
v = d / t
Where d is distance and t is time. Evaluating:
v = 1800 m / 60 s
v = 30 m/sWhat voltage would produce a current of 100amps through an aluminum wire assuming that the re sistance of the wire is3.44×10-4 ohm
If mass = 7.89 kg, weight on Earth =
Answer:
77.322
Explanation:
you have to multiply the mass with gravity (which is 9.8).. which will give u that result
A puddle of water slowly shrinks in the sun. After a few hours, the puddle has dried up completely. Is this an exception to the law of conservation of mass?
Select the correct answer. When organizing your things, it is important to think of logical places to keep items.
A. True
B. False
false
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A firecracker is launched into the with an initial velocity of 53.5 m/s. What will be the firecracker’s maximum height, in meters?
Equations used in picture below:
Answer:
146 m.
Explanation:
From the question given above, the following data were obtained:
Initial velocity (vᵢ) = 53.5 m/s
Final velocity (vբ) = 0 (at maximum height)
Acceleration due to gravity (g) = –9.8 m/s² (since the firecracker is going again gravity)
Maximum height (h) =?
Thus, we can obtain the maximum height reached by the firecracker by using the following formula:
vբ² = vᵢ² + 2gh
0² = 53.5² + (2 × –9.8 × h)
0 = 2862.25 + (–19.6h)
0 = 2862.25 – 19.6h
Collect like terms
0 – 2862.25 = – 19.6h
– 2862.25 = – 19.6h
Divide both side by – 19.6
h = – 2862.25 / –19.6
h = 146 m
Therefore, the maximum height reached by the firecracker is 146 m
Leah is making a chart to compare and contrast renewable and non-renewable resources. Which of the following would best complete the chart? (2 points)
Renewable Resources
Non-renewable Resources
__
Used faster than they can be replaced
Most sources do not emit greenhouse gases
Availability decreases over time
Includes solar power, wind power, and geothermal power
Includes fossil fuels, natural gas, and coal
a. Replaces all current forms of energy
b. New energy is created
c. Cannot be replaced
d. Can be replaced at the same rate or faster than they are used
Answer:
d. Can be replaced at the same rate or faster than they are used
Explanation:
I just took the test, and its the right answer. Your welcome ✌
The state of matter in which particles are arranged in the least organized manner is the
Answer:
gas
Explanation:
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