Answer:
The horizontal component of the velocity is approximately 42.6 m/s
Explanation:
The given parameters are;
The speed of the arrow when it was shot = 52 m/s
The angular direction in which the arrow was shot, θ = 35° above the horizontal
The horizontal component of the velocity is found by the resolution if the velocity vector into its components as follows;
The horizontal component of the velocity = Velocity in the x-direction = vₓ
vₓ = v × cos(θ) = 52 × cos (35°) ≈ 42.6 m/s
vₓ = The horizontal component of the velocity ≈ 42.6 m/s
A car on flat ground accelerates at 0.785 m/s2 when a net force of 1050 N acts on it. How much normal force acts on it?
Answer:
13108.3N
Explanation:
Given parameters:
Acceleration = 0.785m/s²
Net force = 1050N
Unknown:
Normal force acting on car = ?
Solution:
The normal force on this car is the weight of the car;
Normal force = mg
where m is the mass of the car
g is the acceleration due to gravity = 9.8m/s²
Now solve for the mass;
Net force = mass x acceleration
1050 = mass x 0.785
mass = [tex]\frac{1050}{0.785}[/tex] = 1337.6kg
So,
Normal force = 1337.6kg x 9.8m/s² = 13108.3N
13108 works as well for acellus
HELP ASAP physics projectile motion, look at the picture
Which statements represent convection? Select two options.
A. Black asphalt gets very hot on a sunny day.
B. The movement of air in a hot-air balloon makes it rise into the sky.
C. A dark sand beach can burn the soles of your feet.
D. A spoon gets warm from sitting in a soup pot.
E. A house has high heating bills because the heat ends up in the attic.
F. A house loses heat through an exterior wall.
Answer:
-The movement of air in a hot-air balloon makes it rise into the sky.
-A house has high heating bills because the heat ends up in the attic.
please mark as brainliest
Explanation:
I got the question right
A constant net force acts on an object. Describe the motion of the object
a) constant acceleration
B) constant speed
C) constant velocity
D) increasing acceleration
Answer:
C)constant velocity
Explanation:
it is probably corrected
The speed and direction in which an object is moving is called _______________.
The speed and direction in which an object is moving is called the object's velocity.
A 15 kilogram mass is traveling with a velocity of 2.7m/s. What is the object's kinetic energy?
Answer:
KE=1/2*m*v^2
KE=1/2*15*2.7^2
KE=54.675 J
Explanation:
Which statement describes the energy transformation that occurs when a person eats a sandwich to gain energy for a long hike? O A. Thermal energy is transformed into kinetic energy. B. Chemical energy is transformed into kinetic energy. O C. Thermal energy is transformed into chemical energy. o D. Chemical energy is transformed into potential energy.
The energy transformation taking place when the person eats food is chemical energy to kinetic energy. The energy gain from food make us active by giving sufficient kinetic energy.
What is energy transformation?One form of energy can be transformed to the form naturally or mechanically. For instance, we are using electrical devices all such as light, bulb, fan, motors etc.
In light bulb, the electrical energy is converting to light energy and in fan, electrical energy is converting to the mechanical energy. We need energy to activate ourselves and when we starts to move we gain some kinetic energy.
When we eat food, the chemical energy stored in food is transferring to us and converts it to kinetic energy which helps us to be active. Hence, option B is correct.
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What does the kinetic theory explain?
Heat is due to temperature.
Heat is due to potential energy.
Heat is due to the motion of molecules.
Heat is due to Pascal´s principle.
Your answer would be option 3/C
Heat is due to the motion of molecules.
Invasive species often display a wave of advance as they colonize new areas. Mathematical models based on random dispersal and reproduction have demonstrated that the speed with which such waves move is given by the expression 2 Dr , where r is the reproductive rate of individuals and D is a parameter quantifying dispersal. Calculate v'(r), the derivative of the wave speed with respect to the reproductive rate r.
Complete Question
The complete question is shown on the first uploaded image
Answer:
The derivative is [tex]v(r)' = \sqrt{\frac{D}{r} }[/tex]
The correct option is option 1
Explanation:
From the question we are told that
The equation of the speed of the wave of invasion is [tex]v(r) = 2 \sqrt{Dr}[/tex]
=> [tex]v(r) = 2 (Dr)^{\frac{1}{2} }[/tex]
=> [tex]v(r) = 2 * D^{\frac{1}{2} } r^{\frac{1}{2} }[/tex]
Here r is the reproductive rate and the D is the parameter qualifying dispersal
Generally the derivative of this speed is mathematically represented as
[tex]v(r)' = \frac{2}{2} * D^{\frac{1}{2} } * r^{-\frac{1}{2} }[/tex]
=> [tex]v(r)' = \sqrt{\frac{D}{r} }[/tex]
This derivative of the speed represents the rate of change of the invasive speed with respect to the the reproductive rate of an individual
A force of 10 pounds acts north and a force of 20 pounds acts west. Find the resultant force
Answer:
oi
Explanation:
I
7. A person playing basketball changes what
energy, from food into what energy, and what energy as they sweat?
Answer:
I think food into chemical energy
Explanation:
this possibly could be wrong but I think it's right
plz answer this very soon
Answer:
Im gonna say it is answer A:) Hope this helps!
Explanation:
The equation Upper E equals StartFraction 1 Over 2 pi epsilon Subscript 0 EndFraction StartFraction q d Over z Superscript 3 EndFraction is approximation of the magnitude of the electric field of an electric dipole, at points along the dipole axis. Consider a point P on that axis at distance z = 23.00d from the dipole center (d is the separation distance between the particles of the dipole). Let Eappr be the magnitude of the field at point P as approximated by the equations below. Let Eact be the actual magnitude. What is the ratio Eappr /Eact?
Answer:
E_aprox = 1.003 E_real
Explanation:
In this exercise we are given the expression for the electric field of a dipole in the axis direction of the dipole
E_real = k 2q d / √(z² + d²)³
I think your equation has some errors.
In this case they indicate that d is the separation of the charges of the dipole
in the case of z »d this equations approximates
E_aprox = k 2q d/ z³
calculate the value for the two cases
E_real = k2q d / √[ ((23d)² + d²)³]
E_real = k2q d / d³ 12201
E_real = k2q 1/12201 d²
E_aprox = k2q d / (23.00d)³
E_aprox = k2q 1/12167 d²
the error between these quantities is
E_aprox / E_real = 12201 d² / 12167 d²
E_aprox / E_real = 1.003
E_aprox = 1.003 E_real
A book with a mass of 1kg is dropped from a height of 3m . What is the potential energy of th book when it reaches the floor?
Answer:
30 J
Explanation:
height = 3 m
mass = 1kg
acceleration due to gravity = 10m/s²
Potential Energy = mass× gravity × height
= 1kg ×10m/s²× 3m
= 30 J
an object is traveling with a velocity of 3.05 m/s. the object then accelerates at 2.82 m/s^2 over a displacement of 18.4m. what is the final velocity? answer choices - 2.82m/s, 113.1m/s, 54.9m/s, 10.6m/s
Answer:
Final velocity, V = 10.6 m/s
Explanation:
Given the following data;
Initial velocity, U = 3.05m/s
Acceleration, a = 2.82m/s²
Displacement, S = 18.4m
To find the final velocity of the object, we would use the third equation of motion;
[tex] V^{2} = U^{2} + 2aS [/tex]
Where;
V represents the final velocity measured in meter per seconds. U represents the initial velocity measured in meter per seconds. a represents acceleration measured in meters per seconds square. S represents the displacement measured in meters.Substituting the values into the equation, we have;
[tex] V^{2} = 3.05^{2} + 2*2.82*18.4[/tex]
[tex] V^{2} = 9.3025 + 103.776[/tex]
[tex] V^{2} = 113.0785[/tex]
Taking the square root, we have;
V = 10.6 m/s
Therefore, the final velocity of the object is 10.6m/s.
The force of gravity depends on the mass of objects and the distance between them. TRUE OR FALSE?
The force of gravity depends on the mass of objects and the distance between them. This is true statement.
What is force?Physics defines force as the push or pull that modifies the velocity of a massed object.
The ability to change a body's resting or moving condition is referred to as an external force. There is a magnitude and a direction to it.
You may determine the Force using a spring balance. The SI's measure of force is the Newton.
The force of gravity between two objects is directly proportional to the mass of the object and inversely proportional to the square of the distance between them.
Hence, the force of gravity depends on the mass of objects and the distance between them. This is true statement.
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1. In general
, which type of compound tends to have the lowest melting point?
O A. Molecular solids
O B. Network solids
O C. lonic salts
O D. Metals
What type of potential energy is a 9 volt battery an example of?
Answer:
It is electrical potential energy
Explanation:
because any sort of battery produces energy making it electrical. I hope this helps
Answer:
Chemical Potential Energy
Explanation:
A dictator junk gang has all the gas left in the region. They are requiring 2 kg of scrap
metal in exchange for gasoline which they are selling by the liter. Your water rig is
American made with a gallon gas tank and it can drive 30 miles per gallon. How many
liters of gasoline do you need from the junk gang in order to successfully make it the
new destination?
Explanation:
here u go..................................
The volume of the gasoline needed for the gang to successfully make it to the new destination is 340.02 liters.
"Your question is not complete, it seems to be missing to following information";
the new destination of the gang is 2695 miles
The given parameters;
the rate of gasoline consumption, v = 30 miles per gallonthe new destination of the gang = 2695 miles1 gallon = 3.785 liters
The rate of gasoline consumption in miles per liter is calculated as;
[tex]v = \frac{30 \ miles}{gallon } \times \frac{1 \ gallon}{3.785 \ liters} = 7.926 \ miles/liter[/tex]
The volume of the gasoline needed for the gang to successfully make it to the new destination is calculated as;
[tex]volume \ of \ gasoline = \frac{2695 \ miles}{7.926 \ miles/liter} = 340.02 \ liters[/tex]
Thus, the volume of the gasoline needed for the gang to successfully make it to the new destination is 340.02 liters.
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If I am traveling upward in an elevator at a constant velocity, I will appear to weigh more than I normally do.
A. True
B. False
Answer:
A
Explanation:
I know that it's true
Fy is the reaction force from Plate Y. What Statement best describes the action and reaction forces on the plates? Tectonic plates
Answer:
According to Newton's third law of motion, the reaction force is equal to the action force.
Explanation:
Newton's third law of motion states that for every action there is an equal and opposite reaction. This means that if one object exerts a force on a second object, the second object exerts an equal force in the opposite direction. When Plate X pushes on Plate Y with the action force (Fx), Plate Y must push back with an equal force (Fy).
Therefore, the best explanation is that according to Newton's third law of motion, the reaction force is equal to the action force.
For every action, there has equal and opposite reaction - this statement best describes the action and reaction forces on the plates.
What is Newton's 3rd law of motion?As a result of this interaction, there are two forces: one from plate X and one from plate Y. The third law of motion of Newton deals with these two forces, which are referred to as action and reaction forces. Newton's third law is officially expressed as follows: There is an equal and opposite reaction to every action.
The implication of the statement is that there are always two forces acting on the two interacting objects. The force acting on the first object is equal in size to the force acting on the second. The force acting on the first object is acting in the opposite direction to the force acting on the second object. Force pairs—equal and opposing action-reaction force pairs—always exist in pairs.
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How much time will it take a truck to go from 10 m/s to 35 m/s if the truck accelerates at a constant rate of 1.7 m/s2 ?
Answer:
thank u for the happiest year of my life
PLS HELP!!
Which correctly identifies a type of heat transfer shown in the figure above?
C = radiation
B = conduction
A = convection
A = radiation
Answer:
conduction
Explanation:
Metals are good conductors of heat .In the pic the thermal energy is conducted by the cooker and the food gets cooked.Option B is correctAnswer:
[tex] \sf B = conduction[/tex]
I NEED HELP WITH THIS PHYSICS QUESTION
Answer:
C.
Explanation:
The only reason a space station would spin on it's axis would be to provide an artificial gravity.
Tim Kylie is one of the world's top chefs. He is best known for his signature dish, triple-dipped chip steak. This masterpiece contains over a pound of beef braised in duck fat. Another of Chef Kylie's more celebrated dishes is the Hamslaughter Supreme. This dish features ham stuffed sausage links presented in a basket made of braided bacon. While carnivores around the world roar for Chef Kylie's creations, it is unlikely that Chef Kylie will dine with them. As a longtime vegan, Chef Kylie would never dream of devouring one of his own dishes. What type of irony? explain your answer
Answer:
situational irony
Explanation:
Based on the scenario being described, this seems to be an example of situational irony. That is because the irony in this scenario is that Tim's most popular and world-renown cooking creations are made of meat but Tim is a vegan and does not consume meat, which all revolves around the situation that Tim is in. Since he can't enjoy the meals with his fans because he does not eat the ingredients in his own creation. Therefore, being specific to the situation that Tim has created.
A hiker walks 11 km due north from camp and then turns and walks 11 km due east. What is the total distance walked by the hiker?
Answer:
22 km
Explanation:
11km + 11km= 22km
A ball falling through the air has--------
: Only kinetic energy
:Both potential energy because it still has a distance to move before it hits the ground and kinetic energy because its moving.
: Only potential energy
: Both kinetic energy because it still has a distance to move before it hits the ground and potential energy because its moving.
Answer:
It’s B
Explanation:
Answer:
Both potential energy because it still has a distance to move before it hits the ground and kinetic energy because its moving.
Explanation:
PLEASE HELP ME FAST!!
"Along with a flood of other people, they headed past the wreckage and up a nearby mountain for safety. There, they
waited the night. The next morning, news reached the group that the tsunamis were over, but everyone was asked to
evacuate while they had the chance."
When reading this paragraph aloud, where should the reader pause?
a. after "There"
b. after "flood"
c. the reader should not pause
d. the reader should pause after "There" and
Answer:
A
Explanation:
Answer:its a
Explanation:
Help. Please! I really need help. It’s timed, and I’m loosing points.
Answer:
I think balanced
Explanation:
because there is a 2 on each arrow
Answer I'm thinking balanced as well
Explanation:
Acceleration os defined as the rate of change for which characteristic?
A) displacement
B) position
C) velocity
D) time
Answer:
C.) Velocity
Explanation:
I took the test! (im in k12) :)
