Answer:
20 hours
Explanation:
if the truck travels 110 miles in one hours, 110 times 20 equals 2,200.
another way is- 2,200 divided by 110 = 20 hours.
In a ballistics test, a 21 g bullet traveling horizontally at 1200 m/s goes through a 35-cm-thick 300 kg stationary target and emerges with a speed of 950 m/s . The target is free to slide on a smooth horizontal surface.
Complete Question
In a ballistics test, a 21 g bullet traveling horizontally at 1200 m/s goes through a 35-cm-thick 300 kg stationary target and emerges with a speed of 950 m/s . The target is free to slide on a smooth horizontal surface.
a
How long is the bullet in the target? ____ s
b
What average force does the bullet exert on the target? _____ N
c
What is the target's speed just after the bullet emerges? _____ m/s
Answer:
a
[tex]t =3.256*10^{-4} \ s[/tex]
b
[tex]F = 16124 \ N[/tex]
c
[tex]v_1 = 0.0175 \ m/s[/tex]
Explanation:
From the question we are told that
The mass of the bullet is [tex]m = 21 \ g = 0.021 \ kg[/tex]
The horizontal speed is [tex]u =1200 \ m/s[/tex]
The thickness is [tex]s = 35 \ cm = 0.35 \ m[/tex]
The mass of the block is [tex]m_1 = 300 \ kg[/tex]
The emerging speed is [tex]v = 950 \ m/s[/tex]
Generally from kinematic equation
[tex]v^2 = u^2 + 2as[/tex]
So
[tex]a = \frac{v^2 - u^2}{2s}[/tex]
=> [tex]a = \frac{ 950^2 - 1200^2}{2 * 0.35}[/tex]
=> [tex]a = -767857.14 \ m/s^2[/tex]
Gnerally the time taken is mathematically represented as
[tex]t = \frac{ v- u}{a}[/tex]
=> [tex]t = \frac{ 950 - 1200}{-767857.14}[/tex]
=> [tex]t =3.256*10^{-4} \ s[/tex]
Generally from law of momentum conservation we
[tex]m *u + m_1 * u_1 = m * v + m_1 * v_1[/tex]
[tex]u_1[/tex] is the velocity of the block at rest which is [tex]u_1 = 0 \ m/s[/tex]
=> [tex]0.021 *1200 + 300 * 0 = 0.021 * 950 + 300 * v_1[/tex]
=> [tex]v_1 = 0.0175 \ m/s[/tex]
Generally the force is mathematically represented as
[tex]F = \frac{m_1 * v_1 }{t}[/tex]
=> [tex]F = \frac{300 * 0.0175 }{3.256 *10^{-4}}[/tex]
=> [tex]F = 16124 \ N[/tex]
DESPERATE WILL GIVE BRAILIST
Which of the following is NOT an agent of change in the rock cycle?
A. Cooling and crystallization
B. Weathering and erosion
C. Cementation and compaction
D. Drying and decaying
Answer:
A
Explanation: I don't think I ever heard of Crystalization being apart of the rock Cycle but I could be wrong hope this helps
What theory or hypothesis can you find about gravity?
Answer:
That it will always work on earth.
Explanation:
If it's on earth it will not be able to elude gravity.
That's all i've got sorry
A rocket is shot out of a navy battleship to test a new rocket. It takes 16 seconds for the rocket
to reach its destination after leaving the barrel. If its final velocity was found to be 200 m/s,
then what was the rocket's acceleration?
length measures the amount of matter in a substance or an object. true or false ?
Answer:
false
Explanation:
What will be the final velocity of a car, if it starts
to make from ges and accelerates at 10 m/s² after 5 seconds?
Samantha always feels rushed in the morning, and she often forgets important items when she leave for school
The diagram models a sound wave traveling through a liquid.
Which diagram models how the sound wave will change when it enters a gas?
Answer:
The correct option is;
A.
Explanation:
The speed of sound varies with the medium within which the sound propagates. Therefore, the wavelength of the sound wave changes as it moves from one medium to another
The speed of sound in liquid which is given by the square root of the ratio of the bulk modulus (compression resistance) to the density of the liquid is generally faster than in gas, therefore, given that the frequency of the sound source in constant, the wavelength, λ, given as λ = v/f, which is therefore, directly proportional to the speed of sound, also reduces, which is represented by a reduced distance between successive crest as seen in figure A.
Un objeto se encuentra a los 4 segundos de 10 cm del origen, a los 12 segundos, a100 centimetros del origen, si mantuvo un movimiento rectilineo uniforme. ¿cual es su velocidad?
Explicación:
La velocidad es el cambio de distancia con respecto al tiempo.
Velocidad = Δd / Δt
Δd es entonces un cambio de distancia
Δt es el cambio en el tiempo
Δd = d2 - d1
Δd = 100 cm - 10 cm
Δd = 90 cm
Convertir a metros
100 cm = 1 m
90cm = x
x = 90/100
x = 0,9 m
Por lo tanto, 90 cm = 0,9 m
Δt = t2 - t1
Δt = 12 s - 4 s
Δt = 8 s
Sustituye el valor obtenido en la fórmula de velocidad:
Velocidad = 0.9 / 8
Velocidad = 0,1125 m / s
Por lo tanto, su velocidad es de 0,1125 m / s.
1. Compare and Contrast Elements and Atoms (3 column table)
PLeasee help!!
Answer:
A particular atom will have the same number of protons and electrons and most atoms have at least as many neutrons as protons. An element is a substance that is made entirely from one type of atom. For example, the element hydrogen is made from atoms containing just one proton and one electron.
Explanation:
carl walks a distance of 100 meters at a speed of 4 m/s. how much time does it take? ( please show step-by-step explanation )
Answer:
25s
Explanation:
To find the amount of seconds it takes, you divide 100 (the meters) by 4 (the meters per second) the meters then cancel out, and you are left with 25 s
• What are some examples of REPresentatives?
answer:
the house of representatives is an example of representatives!
explanation:
hope this helped <3 also if wouldn't mind could you pls give me brainliest? (im trying to level up) thanks! :)
what is the specific heat of an unknown substance if a 2.50 g sample releases 12 calories as its specific heat capacity is 0.96 J/gC. What is the temperature change?
Answer:
1) The specific heat is the heat required to be added to a unit mass of the substance to cause a unit rise in its temperature
2) The temperature change is 20.92°C
Explanation:
The given parameters are;
The mass of the substance, m = 2.50 g
The heat released by the sample, ΔQ = 12 calories = 50.208 J
The specific heat capacity of the substance, c = 0.96 J/(g·°C)
Therefore, we have;
Heat released, ΔQ = Mass, m × Specific heat capacity, c × Temperature change, ΔT
Substituting in the known values gives
50.208 J = 2.50 g × 0.96 J/(g·°C) × ΔT
ΔT = 50.208 J/(2.5 g× 0.96 J/(g·°C)) = 20.92°C
The temperature change = 20.92°C
Help Plz ;)
In the diagram below, 4 pairs of metal spheres of equal size sit on a level surface the same distance apart. However, the type of metal each sphere is made from changes the mass of these spheres. Which pair of metal spheres has the greatest gravitational attraction between them?
Answer:
Errrrrrrm I believe it would be (D)
What is Terminal Velocity
Answer:
the maximum velocity attainable by an object as it falls through a fluid or the air
Explanation:
If the density of the object is lesser than density of the water, what will happen?
Explanation:
Compare the density of the object in question to the density of water. If its density is less than water, it will float. ... If the density of an object is greater than water, it will sink.
Answer:
The object will float.
Explanation:
If the density is less than of water, then the object will float. Take ice for example. It's density is less than water's density. That's why ice floats at the top of lakes. I hope this helps and I hope it's not wrong, but I don't think it is.
An arrow is given an initial velocity from the bow with which it is shot. Assuming that the air resistance is negligible, once the arrow leaves the bow,
A. it requires another force to keep it moving.
B. it accelerates horizontally until it stops moving.
C. it moves with a positive vector to the ground. D. the only force acting on it is the force of gravity.
Answer: it moves with a positive vector yo the ground
Explanation:
the process of changing soild to liquid stat is called
A.melting
B.boiling
C.evaporation
D.freezing
Answer:
When a solid reaches the temperature of its melting point, it can become a liquid. For water, the temperature needs to be a little over zero degrees Celsius (0oC) for you to melt.
Explanation:
In the "herd" strategy for immunization, vaccinations are given _____. only to individuals who are most likely to be exposed to a disease only to individuals who travel to countries where certain disease are a threat to a large majority of the population the entire population
Answer:
C. to a large majority of the population.
Explanation:
Immunization can be defined as the process of boosting an individual's immunity or immune system against antigens (immunogen) which cause diseases by the administration of vaccines.
Basically, immunization helps to improve the functions of the antibodies, B cells, T cells etc.
In the "herd" strategy for immunization, vaccinations are given to a large majority of the population in order to protect and prevent the spread of an infectious disease to those who are not immune.
Answer:
to a large majority of the population
Explanation:
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A rock thrown up into the air with an initial speed of 25 m/s . How much time will pass before the rock is moving back down at 6 m/s ?
PLEASE HELP!!! ILL MARK BRAINLYEST!!!!
What type of change is melting ice?
A. physical
B. chemical
Answer:
A. physical
Explanation: When you melt an ice cube (H2O), you have a physical change because you add energy. You added enough energy to create a phase change from solid to liquid. Physical actions, such as changing temperature or pressure, can cause physical changes. No chemical changes took place when you melted the ice.
i hope this helped good luck:)
Put the following equipment in order from smallest to largest
Marble Table, Chocolate Tempering Machine, Pastry Bag,
Sifter, Commercial Dough Sheeter, Steam Jacketed Kettle,
Rolling Pin, Parisian Scoop, Chinois, Pocket Thermometer,
Immersion Blender, Robot Coupe
Answer:
Parisian Scoop
Pocket thermometer
Pasty Bag
sifter
chinois
Rolling Pin
Immersion Blender
Chocolate tempering machine
Robot Coupe
Steam Jacketed kettle
marble table
commercial dough sheeter
Explanation:
Really it could differ dependent on model variety of each item
As an object falls freely, its
Answer:
acceleration increases or is uniform
Explanation:
Answer:
Both
Explanation:
1. A lab cart travels at 0.5 m/s for 3.7 m. How long did it take the cart to travel this distance? show steps
Answer:
Time, t = 7.4 secs.
Explanation:
Speed can be defined as distance covered per unit time. Speed is a scalar quantity and as such it has magnitude but no direction.
Mathematically, speed is given by the equation;
[tex]Speed = \frac{distance}{time}[/tex] ....equation 1
[tex]Time = \frac{distance}{speed}[/tex] .....equation 2
Given the following data;
Speed = 0.5m/s
Distance = 3.7m
Substituting into equation 2;
[tex]Time = \frac{3.7}{0.5}[/tex]
Time, t = 7.4 secs.
What is the momentum of a 7.0 kg bowling ball rolling at 2.4 m/s? Express your answer to two significant figures and include the appropriate units
Answer:
16.8 kg m/s is the momentum of a bowling ball
Explanation:
Given:
m = 7kg
v = 2.4 m/s
Unknown:
p or momentum
Formula and Solution:
p = mv
p = 7kg × 2.4m/s
Final Answer:
p = 16.8 kg m/s is the momentum of a bowling ball
How to find momentum?
Momentum, product of the mass of a particle and its velocity. Momentum is a vector quantity. It has both magnitude and direction. Isaac Newton's second law of motion states that the time rate of change of momentum is equal to the force acting on the particle. See Newton's laws of motion. Momentum.
Formula = p = mv or momentum = mass x velocity
During an electricity investigation, a student stated, "When the voltage increases current increases." Which equation can be used to justify this claim?
Answer:
The equation used to justify the claim is Ohm's law:
I = V/R
where:
V = voltage
I = current
R = Resistance
Explanation:
Ohm's Law describes the relationship between current, voltage and resistance, and is represented by the equation; i = v/r.
The law states that the current flowing through a circuit is directly proportional to the voltage, v, and inversely proportional to the resistance, r. This means that if the current is increased, the voltage will increase, and the resistance will reduce.
The equation that can be used to justify the claim is : I = V/R ( Ohm's Law )
Ohm's law ( I = V/R ), states that the current flowing through an electrical circuit is directly proportional to the voltage flowing through the circuit and inversely proportional to the resistance in the circuit.
In a nutshell an increase in voltage will cause a proportionate increase in the current present in the electrical circuit.
Therefore we can conclude that the equation that can be used to justify the claim is Ohm's law ( I = V/R )
Learn more about Ohm's Law : https://brainly.com/question/14296509
Electromagnetic energy travels through space in the form of what
A. electric charges
B. shape
C. waves
D. lower
E. higher
F. chemical
G. electrical
H. nuclear
Answer:
c
Explanation:
electromagnetic energy is transmitted through space in the form of waves.
Last summer, Jose left early in the morning at 5 a.m. and drove to Ensenada 100 miles away. He stopped to get gas and drove an extra 300 miles. He finally stopped in Cabo San Lucas at 1p.m. What was the average speed that Jose was traveling?
Answer:50 miles per hour
On the moon, Bob weighs 160N. Fred weighs 882N on Eartch. Who has the greater mass?
Answer:
Fred weighs more than bob
Explanation:
1. How does Newton’s first law prove that planets are moving in a circular pattern?
2. How does Newton’s third law prove that Earth is moving and the Sun is not?
3.Using Newton’s law of gravitation and the third law of motion, argue qualitatively how the ratio between the orbital period and the radius of a planet do or do not change, based upon Kepler’s third law of motion.
Answer:
Explanation:
Newton's First Law of Motion states that a body in motion keeps the same motion unless acted upon by an outside force. Likewise, if it is not moving, it remains that way unless a force acts on it.