An unfortunate 18 kg monkey falls from a 40 m tall tree. What is the monkeys final velocity just befor he impacts the ground.? a 7063.2 m/s b 784 m/s c 28 m/s d 720 m/s
While in empty space, an astronaut throws a ball at a velocity of 13 m/s. What will the velocity of the ball be after it has traveled 6 meters?
Michaela is baking a dessert. She measures 100 mL of vegetable oil by pouring it from the bottle into a measuring cup. Then she pours the vegetable oil into a bowl with the other ingredients. Which best describes what happened to the vegetable oil during this process? The volume of the vegetable oil changed, but the shape did not. The shape of the vegetable oil changed but the volume did not. Both the volume and the shape of the vegetable oil changed. Both the volume and the shape of the vegetable oil remained the same.
Option B: The shape of the vegetable oil changed but the volume did not.
To answer this question, we need to understand the states of matter.
It is pertinent to know that the state of matter will only change when it gains or loses energy.
In this case, the vegetable oil is just transferred from a bottle into a cup and then into a bowl. In all this, no energy was gained nor lost, the only thing that will change will be the new shape of the oil because of the bowl in which it currently resides which is different in shape than the bottle.
Thus, we can conclude that the shape of the vegetable oil changed, but the volume didn't change
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Suppose you put in 100 j of work on a lever and get out 93 j of work. what is the efficiency of the lever and how much of the work input is lost as heat in joules?
The efficiency of the lever is 93%, calculated by comparing the output work to the input work. 7 joules of the input work are lost as heat.
The efficiency of the lever is determined by comparing the output work to the input work. In this case, the efficiency can be calculated using the formula:
Efficiency = (Output Work / Input Work) X 100%
Substituting the given values:
Efficiency = (93 J / 100 J) X 100%
Efficiency = 93%
The amount of work lost as heat is the difference between the input work and the output work, which can be calculated as:
Heat lost = Input Work - Output Work
Heat lost = 100 J - 93 J
Heat lost = 7 J
Therefore, 7 joules of the work input are lost as heat.
What is the magnitude of a star that's 10 times brighter than a fifth magnitude star?
What dies the viscosity of a liquid measure? the relationship between density and speed of flow how rapidly its volume changes with increasing temperature the ration of silica to iron content within a magma the resistance of a liquid to flow?
A 3.00 kg cart on a frictionless track is pulled by a string so that it accelerates at 2.00 m/s/s. what is the tension in the string'
PLEASE SHOW YOUR WORK
Final answer:
The tension in the string pulling the cart, which has a mass of 3.00 kg and is accelerating at 2.00 m/s², is calculated using Newton's second law (F = ma) to be 6.00 N.
Explanation:
The student is asking to calculate the tension in the string that is pulling a 3.00 kg cart, which is accelerating at 2.00 m/s2 on a frictionless track. To find the tension, we can use Newton's second law of motion, which states that the force is equal to mass times acceleration (F = ma).
First, we identify the mass (m) of the cart as 3.00 kg and the acceleration (a) as 2.00 m/s2. The only force acting on the cart in the horizontal direction is the tension in the string since friction is negligible.
So, the tension (T) can be calculated as follows:
T = m × a
T = 3.00 kg × 2.00 m/s2
T = 6.00 N
Therefore, the tension in the string is 6.00 Newtons.
The relationship between frequency, wavelength, and speed holds for light waves because
A.light travels slower in a vacuum than in air
B.all forms of electromagnetic radiation travel at a single speed in a vacuum
C.light travels in straight lines
D. Different forms of electromagnetic radiation travel at different speeds
The relationship between frequency, wavelength, and speed holds for light because each type of electromagnetic wave travels at the same speed (the speed of light) in a vacuum. This leads to a constant relationship between these parameters for all light waves, described by the equation: speed of light = frequency X wavelength.
Explanation:The relationship between frequency, wavelength, and speed holds for light waves because all forms of electromagnetic radiation travel at a single speed in a vacuum. This speed is known as the speed of light, typically represented by the symbol c and is approximately 299,792 kilometers per second. These properties of light waves are commonly captured in the formula c = λν, where c is the speed of light, λ (lambda) is the wavelength, and ν (nu) is the frequency. This means that the frequency of a light wave times its wavelength always equals the speed of light. Therefore, the relationship between frequency, wavelength, and speed holds for light because these factors are intrinsically linked, irrespective of the type of electromagnetic wave.
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which planet rotates different from the others
The buoyant force acting on an object is always equal to
A. the weight of the submerged portion of the object
B. the mass of the submerged portion of the object
C. the weight of the fluid the object displaces
type of circuit does charge move in only one direction
An animal keeper is studying X-rays of two animals, as shown. X-rays show the internal structures of an animal.
Which statement is best supported by the X-rays?
Animal Y has an outer skeleton, and animal Z has a spiny covering.
Animal Y has a spiny covering, and animal Z has an outer skeleton.
Animal Y is a vertebrate, and animal Z is an invertebrate.
Animal Y is an invertebrate, and animal Z is a vertebrate.
D: Animal Y is an invertebrate, and animal Z is a vertebrate.
Explanation:Animal Y is an invertebrate because it does not have a spine, and animal Z is a vertebrate because you can see in the X-Ray that it has a spine. Edge2020
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A water pump is a positive displacement-type pump true or false
Answer: True
A water pump belong to a positive displacement pump that provides constant flow of water at fixed speed, regardless of changes in the counter pressure. The two main types of positive displacement pump are rotary pumps and reciprocating pumps.
Moreover, water pump is a reciprocating positive displacement pump that have an expanding cavity on the suction side and a decreasing cavity on the discharge side. In water pumps, the liquid flows into the pumps as the cavity on the suction side expands and then the liquid flows out of the discharge as the cavity collapses providing water in a pail.
which of the following has a definite pattern of variation with respect to latitude
A.pH
B.Density
C.salinity
D.temperature
Your weight depends on
A. your mass
B. your distance to the center of the Earth
C. the earth's mass
D. A, B, and C
E. none
Which of the following statements describes electric fields?
Electric potentials are caused by electric fields.
Electric fields are scalar values.
Electric charges produce electric fields.
Electric fields cannot exist in space.
The correct answer is
Electric charges produce electric fields.
In fact, electric fields are produced by electric charges. For instance, the electric field produced by a single-point charge is radial, and its intensity decreases as the inverse of the square of the distance from the charge, according to:
[tex] E=k\frac{q}{r^2} [/tex]
where k is the Coulomb's constant, q is the magnitude of the charge and r is the distance from the charge. If the charge is positive, the electric field points away from the charge; if the charge is negative, the electric field points toward the charge.
what quantity is multiplied by the hydraulic lift system of a dump truck?
A.force
B.speed
C.pressure
D.distance
HELP PLEAASE!!!You push against a steamer trunk with a force of 750 N at an angle of 25° with the horizontal . The trunk is on a flat floor and the coefficient of static friction between the trunk and floor is 0.77. What is the most massive trunk you will be able to move? 80 kg 90 kg 67 kg
The most massive trunk you will be able to move is approximately [tex]\( 69.2 \, \text{kg} \)[/tex]. So, the closest option is 67 kg.
To find the maximum mass of the trunk you can move, we need to consider the maximum force of static friction that can be exerted by the floor on the trunk. The maximum force of static friction[tex](\( F_{\text{friction}} \))[/tex] can be calculated using the formula:
[tex]\[ F_{\text{friction}} = \mu_s \times N \][/tex]
Where:
-[tex]\( \mu_s \)[/tex] is the coefficient of static friction,
- [tex]\( N \)[/tex] is the normal force exerted by the floor on the trunk.
The normal force[tex](\( N \))[/tex] can be calculated as the vertical component of the force you exert on the trunk:
[tex]\[ N = F_{\text{vertical}} = F \times \cos(\theta) \][/tex]
Where:
- F is the force you exert on the trunk (750 N in this case),
- [tex]\( \theta \)\\[/tex] is the angle of the force with the horizontal (25° in this case).
Substituting the given values:
[tex]\[ N = 750 \, \text{N} \times \cos(25^\circ) \]\[ N \approx 750 \, \text{N} \times 0.906 \]\[ N \approx 679.5 \, \text{N} \][/tex]
Now, we can calculate the maximum mass m of the trunk using the formula:
[tex]\[ F_{\text{friction}} = m \times g \][/tex]
Where:
- m is the mass of the trunk,
- g is the acceleration due to gravity (approximately [tex]\( 9.81 \, \text{m/s}^2 \)).[/tex]
Substituting the given values:
[tex]\[ 679.5 \, \text{N} = m \times 9.81 \, \text{m/s}^2 \]\[ m = \frac{679.5 \, \text{N}}{9.81 \, \text{m/s}^2} \]\[ m \approx 69.2 \, \text{kg} \][/tex]
Therefore, the most massive trunk you will be able to move is approximately [tex]\( 69.2 \, \text{kg} \)[/tex]. So, the closest option is 67 kg.
A substance has a specific heat of 0.870 J/g°C. It requires 2,000.0 joules to increase the temperature of 10.0 grams of the substance from its original temperature to its final temperature.
By how many degrees did the substance increase?
87.0°C
174°C
230°C
1,740°C
Answer: [tex]230^0C[/tex]
Explanation:
[tex]Q=m\times c\times \Delta T[/tex]
q = heat absorbed or released by a substance = 2000.0 J
m= Mass of substance = 10.0 g
c = specific heat of the substance = [tex]0.870 J/g^0C[/tex]
[tex]\Delta T=T_f-T_i[/tex] = Change in temperature
Putting in the values we get:
[tex]2000.0J=10.0g\times 0.870J/g^0C\times \Delta T[/tex]
[tex]\Delta T=230^0C[/tex]
Thus the temperature changed by [tex]230^0C[/tex].
Answer:Answer is C. 230 degrees celsius.
Explanation:Edge 2023
A car is moving at 12 m/s and has a mass of 600 kg. What is the kinetic energy of the car? (Formula: )
As we know that kinetic energy is given by formula
[tex]K = \frac{1}{2} mv^2[/tex]
here
m = mass of the object
v = speed of the object
now we can plug in the values of mass and speed in the above formula
[tex]K = \frac{1}{2}*600*12^2[/tex]
[tex]K = 300*144[/tex]
[tex]K = 43200 J]/tex]
so kinetic energy of the car is 43200 J
Answer:
B. 43200 J
Explanation: