Example: Increasing the tension in A string causes the speed of waves on the string to increase. Since the wavelengths of the standing waves remains constant, this results in a larger frequency of oscillations in the string, which we percieve as a higher pitch when the string vibrates the air.
what is international system of units?
A 2035 kg Oldsmobile traveling east on Saginaw Street at 15.8 m/s is unable to stop on the ice covered intersection for a red light at Abbott Road. The car collides with a 4012 kg truck hauling animal feed north on Abbott at 10.5 m/s. The two vehicles remain locked together after the impact.
Required:
Calculate the velocity of the wreckage immediately after the impact.
The velocity of the wreckage immediately after the impact is mathematically given as
v=12.284m/s
The velocity of the wreckageQuestion Parameters:
A 2035 kg Oldsmobile traveling east on Saginaw Street at 15.8 m/s is unable to stop on the ice covered intersection for a red light at Abbott Road.
The car collides with a 4012 kg truck hauling animal feed north on Abbott at 10.5 m/s
Generally the equation for the speed after collision is mathematically given as
mu +MU = ( m + M) v
Therefore
v = ( 2035*15.8 + 4012*10.5 ) / ( 2035+ 4012)
v=12.284m/s
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The r force is the overall force. If two forces are acting in the same direction, the resultant force is the s of all the forces.
please help me fill in the two blanks were r and s is
The resultant force is the overall force. If two forces are acting in the same direction, the resultant force is the sum of all the forces.
Happy to help!
The resultant force is the overall force. If two forces are acting in the same direction, the resultant force is the sum of all the forces. Hence the blanks where r and s are resultant force and sum respectively.
What is force?Force is an external factor, which aids a body to change from the state of motion or rest. There are different types of forces namely, magnetic force, gravitational force, nuclear force, frictional force etc.
The unit of force is newton. According to Newton's second law of motion, the force acting on a body is the product of its mass and acceleration. Thus we have the equation F = ma.
If a body experience's different forces or the same forces in different direction the net force in after all balancing is called the resultant force.
Now, if two forces are acting on the same direction, the resultant force will be the sum of these forces.
Therefore, the blanks in the place of r and s are resultant and sum respectively.
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How does gravity cause the planets to move in a circle around the sun?.
Answer:
The sun's gravity pulls the planet toward the sun, which changes the straight line of direction into a curve. This keeps the planet moving in an orbit around the sun. Because of the sun's gravitational pull, all the planets in our solar system orbit around it.
An object in projectile motion will follow which path?
curved up from the ground
curved down toward the ground
straight down toward the ground
straight up from the ground
An object in projectile motion will follow curved up from the ground, curved down toward the ground. The correct options are (a) and (b).
An object in projectile motion will follow a curved path. Specifically, it will follow a curved trajectory that is symmetric around the highest point of its flight. The object will initially move horizontally while also experiencing vertical motion due to the force of gravity. As a result, the object's path will be a parabolic curve.
So, the correct answer is Curved up from the ground (when initially launched) and curved down toward the ground (when it reaches the highest point and descends). The correct options are (a) and (b).
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If the frequency of a wave is 400hz and it’s wave length is2.5 what is the velocity ?
Which is the Colour of cleanliness
A ball of mass 1.84 kg is dropped from a height y, =
1.49 m and then bounces back up to a height of y, = 0.87 m.
How much mechanical energy is lost in the bounce?
Help
Answer:
11.408 joules
Explanation:
soln
From the question above
Mass of ball = m = 1.84kg
Height of ball when dropped = 1.49m
Height of ball when it bounces back up = 0.87m
Recall
Potential energy (P.E) = mass × height × g
Kinetic energy(K.E) = 1/2 × mass × (velocity)²
Mechanical energy = K.E + P.E
M.E lost = M.E when ball dropped – M.E when ball bounces back up
Recall that g = acceleration due to gravity = 10ms²
P.E/K.E when ball dropped = 1.84 × 1.49 × 10
P.E/K.E when ball dropped = 27.416J
P.E/K.E when ball bounces back = 1.84 × 0.87 × 10
P.E /K.Ewhen ball bounces back = 16.008J
Since P.E = K.E
M.E when ball dropped = 27.416J
M.E when ball bounces back = 16.008J
Therefore,
M.E lost = 27.416 - 16.008
M.E lost = 11.408Joules
Which picture correctly shows the path of the reflected light ray?
Select one:
a. A
b. B
c. C
d. D
In my opinion it's picture D
A cyclist is travelling at 4.0 m/s. She speeds up to 16 m/s in a time of 5.6 s. Calculate her acceleration.
Answer:
acceleration: 2.14 m/s²
Explanation:
acceleration = (final velocity - initial velocity ) ÷ time taken
Here the final velocity is 16 m/s, initial velocity is 4 m/s, time taken is 5.6 s
acceleration = ( 16 - 4 ) ÷ 5.6
→ 12 ÷ 5.6
→ [tex]\left[\begin{array}{ccc}\frac{15}{7}\end{array}\right][/tex] m/s² or 2.14 m/s²
How was Mendeleev first periodic table like the periodic table today
Answer:
He began organizing the known elements according to their atomic weights and chemical properties.
Explanation:
20 POINTS
What is an endothermic reaction?
Answer:
An endothermic reaction is a chemical reaction in which more energy is needed to break bonds in the reactants than is released when new bonds form in the products.
A constant input of energy, often in the form of heat, is needed to keep an endothermic reaction going.
Explanation:
A would be the answer
Answer:
A reaction that contributes energy to the surroundings
Explanation:
When energy is taken in from the Surroundings, the temperature of the surroundings decreases
PLEASE HELP
Approximate grams per spoonful:
g
why a bulb contains coiled wire?
Answer:
The filament is coiled to give it greater length. If the filament was just a piece of straight wire it would only give out a small amount of light. By curling the wire into a coil, a very long length of wire can be stored in a small space. When electricity flows through the coil it can give out much more light.
what is density
what is density
Answer:
The density of a substance is the relationship between the mass of the substance and how much space it takes up
Explanation:
thats it take my word hope thats what u meant
Density is a measure of mass per unit of volume. Density is a measure of mass per volume. The average density of an object equals its total mass divided by its total volume. An object made from a comparatively dense material (such as iron) will have less volume than an object of equal mass made from some less dense substance (such as water). Perhaps the highest density known is reached in neutron star matter. The singularity at the centre of a black hole, according to general relativity, does not have any volume, so its density is undefined.
Activity of integration Most of the people in a certain village called Bileafe where much tobacco is grown bought vehicles after tobacco sales. However, no sooner than later many of the vehicles either broke down or they were parked at home since fuel became expensive to afford. As a student of chemistry, develop a message for the owners of the cars in this village explaining why the vehicles should be kept well even if they are spoilt, where they should be kept, and what kind of change they will undergo if not properly kept. You can use the resources to help you develop the message.
They will be instructed to park their cars in a cool dry environment in order to prevent rusting of the vehicle parts.
What is Rusting?This is defined as a chemical change in which Iron reacts with Oxygen to form a new substance called Iron oxide.
Iron oxide is usually brownish in color and further corrodes the metal parts. It is also referred to as a Chemical change in chemistry due to new substance being formed.
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* A 5 kg ball is dropped from a height of 20 m. How much kinetic energy will it have 10 m above the ground? a. 490 J b. 392 J C. 480 J d. 100 J
Answer:
A. 490
Explanation:
soln
mass = m = 5kg
Height = h = 10m
Acceleration due to gravity = g = 9.8ms²
K.E = 1/2 × mass × (velocity)²
Recall from equations of motion
v² = u² + 2gh
Therefore,
K.E = 1/2 × mass × ( u² + 2gh)
K.E = 1/2 × 5 × ( 0² + 2×10×9.8)
K.E = 1/2 × 5 × 196
K.E = 1/2 × 980
K.E = 490 Joules
A 50N crate is lifted 0.86m from the ground then is allowed to drop losing 15 J of energy. What is the new height of the crate?
We have that the new height of the crate is mathematically given as
Hn=0.56
New height of the crate
Question Parameters:
A 50N crate is lifted 0.86m from the ground
then is allowed to drop losing 15 J of energy.
Generally the equation for the Potential energy is mathematically given as
P.E=mgh
Where
m=50/9.8
Therefore
h=15/(50/9.8*9.8)
h=0.3m
New height
0.86-0.3
Hn=0.56
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Can light energy from the sun be used to directly fuel cellular work?.
Answer:
None of the light energy from the sun can be used directly to fuel cellular work. First it must be captured in the bonds of a molecule called adenosine triphosphate (ATP).
Explanation:
A 15-kg cart filled with apples is sitting at the top of a bill that is 21 m high. The apples in the
your cart have a mass of 33 kg. What is the potential energy of the cart and the apples? Round your answer to the nearest tenth
Hi there!
Recall the equation for gravitational potential energy:
[tex]U = mgh[/tex]
U = GPE (J)
m = mass (48 kg)
g = acceleration due to gravity (9.8 m/s²)
h = height (21 m)
Plug in the givens and solve.
[tex]U = (15 + 33)(9.8)(21) = \boxed{9878.4 J}[/tex]
Which of the following statements about nutrition is true?
Complex carbs taste bland and digest slower than simple carbs.
Eating the right amount of dietary fiber promotes regular bowel movements and helps
prevent constipation.
You've got to eat enough protein so your body can grow, stay in shape, and repair itself.
all of these
Answer:
nobody knows
Explanation:
which of these questions could best help you evaluate the advice from this website selling supplements?
A .does the author have a large following?
B. is the advice supported by empirical evidence?
C. is the advice easy to follow ?
D. how much do supplements cost?
The Answer to this question is Number B.
Answer :- B
Frosted glass is an example of which type of material?
it is an example of a translucent object
You are observing a star about 95 trillion km (10 light-years) away. How old is the most recent information you can get about this star
The most recent information you can get about this star is near 10 years old.
What is a light-year?A light-year is a distance unit, that represents the distance that light can travel in one year.
Now, we know that nothing can move faster than the speed of light, and the only information that we can get about this star comes through light (electromagnetic waves). And these waves travel at the speed of light.
So these waves would need at least 10 years to travel from the start to the satellites that can detect them, this means that the most recent information that you can get about this star is actually 10 years old.
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please help!!!!!!!!!!!!! i will give brainly
1.) Define force? Give an example.
2.) Define Newton's 1st Law? Give an example.
3.) Define Newton's 2nd Law? Give an example.
4.) Define Newton's 3rd Law? Give an example.
Answer:
1.) strength or energy to do an action or movement
2.)an object will jot change its motion unless acted on by an unbalanced force
A horse travels at 12 km/hour. How long will it take to travel 18km?
At which position would the electric force be greatest?
CI
The image shows the electric field lines around two
charged particles
O 1
02
1
2
O 3
O 4
3
*4
Helps pls
Explanation:
F = qE
where E is an electric field.
The denser lines of electric force are, the stronger electric field will be.
Since 4 is densest part, electric force on 4 is would be greatest.
The electric field would be stronger the denser the lines with electric force are. Since part 4 is the densest, its electric force would be greatest. Therefore, the correct option is option 4.
The force acting on the items is referred to as the electric force. When two electrons and two protons are put at equal distances, the electric force that separates them is equivalent to the electrostatic charge between the two.
The electric force primarily reliant on the quantity known as electric charge rather than the object's mass. Forces involving charges are the subject of electrostatics. Static refers to charges that aren't moving, or are moving very slowly. The electric field would be stronger the denser the lines with electric force are. Since part 4 is the densest, its electric force would be greatest.
Therefore, the correct option is option 4.
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A car with a mass of 1,600 kg has a
kinetic energy of 125,000 J. How fast is it moving?
Answer:
Hope This will help you
From the calculation, the kinetic energy of the moving car is 12.5 m/s.
What is kinetic energy?The term kinetic energy refers to the energy that a body possesses as a result of its motion. It is the energy of a moving body.
Now we know that the kinetic energy is 125,000 J and the mass is 1,600 kg. Now;
KE = 1.2 mv^2
v = √2KE/m
v = √ 2 * 125000/1600
v = 12.5 m/s
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To scientists, amount of work done depends on...
Select one:
a. force applied to an object and distance it moved.
b. speed of an object and distance it moved.
c. mass and acceleration of an object.
d. weight and velocity of object.
Answer:
Option A
Force applied to an object and distance it moved.
Explanation:
The size of the force applied and the distance something moves.
W = F • d
-TheUnknownScientist 72
Samir is watching waves hit a beach. He notices that as the waves get closer to the shore (where the water is shallow), they change direction. Which type of wave effect is he seeing?
Answer:
refraction
Explanation:
When a wave crosses a boundary between media at an angle other than normal to the boundary, it will be refracted by an amount depending on the relative speeds of the wave in the different media.
The change in direction that Samir observes is due to refraction of the wave as it slows down in shallower water.