Answer:
Traditionally, the coaster cars are pulled up the first hill by a chain; as the cars climb, they gain potential energy. Then, when the cars descend this hill, potential energy is again changed to kinetic energy. This conversion between potential and kinetic energy continues throughout the ride.
Explanation: hi how ya doing
A projectile is shot on level ground with a
horizontal velocity of 17 m/s and a vertical
velocity of 34 m/s.
-Find the time the projectile is in the air.
The acceleration due to gravity is 9.8 m/s2.
Answer in units of s.
-Find range R.
Answer in units of m.
Answer:
time rising = 34 / 9.8 = 3.47 sec
total time in air = 2 * 3.47 sec = 6.94 sec
(time rising must equal time falling)
R = 17 m/s * 6.94 s = 118 m
Can also use range formula
R = v^2 sin (2 theta) / g
tan theta = 34 / 17 = 2
theta = 63.4 deg
2 theta = 126.9 deg
sin 126.9 = .8
v^2 = 17^2 + 34^2 = 1445 m^2/s^2
R = 1445 * .8 / 9.8 = 118 m agreeing with answer found above
1.) 450 cm =____m
2.) 24 miles =____cm
3.) 16.7 gallons =____liters
Answer:
450cm = 4.5m
24miles = 3862430 cm (3.9×10⁶cm)
16.7 gallons = 63.216 liters (approx.)
Explanation:
brainliest plz
Which factor increases as the effiency of a machine increases
Answer:
1. The efficiency of the induction increases when the mechanical load increases because as the motors load increases, its slip increases, and the rotor speed falls. Since the rotor speed is slower, there is more relative motion between the rotor and the stator magnetic fields in the machine.
Explanation:
Why can’t you hit a feather in mid air with a force of 200 N
(This is all the info I was given)
the energy of a photon is inversely proportional to its:
Answer:
Wavelength.
Explanation:
The measure of energy is straightforwardly corresponding to the photon's electromagnetic recurrence and subsequently, equally, is contrarily relative to the frequency. The higher the photon's recurrence, the higher its energy.
Hope this helps! :D
A car accelerated from rest in 3.07s. During this time, the car went 46m forward. What was its acceleration?
_______m/s/s
If the activity of a source is 70 Bq after 2 years, and 35 Bq after 15 years. How long will be until the activity is 8.75 Bq?
Answer:
So if the half-life is two days, four half-lives is 8 days. Suppose a sample has a count rate of 3,200 Becquerel (Bq) at the start, then its count rate after 8 days would be 1/16th of 3,200 Bq = 200 Bq.
A car of mass 850 kg rests on a slope at 25 to the horizontal. Calculate the magnitude of the component of the cars weight which acts parallel to the slope
Answer:
plz show the question ❓ by photo
What is the velocity at 10 seconds? PLEASE HELP!!!!!
Answer:
you you don't resource easy answer with great your your food look your photo this must be your photo near me pure cal is your office that is meaning of 5 to 10 2 5 10 20 1234 I don't know that time what to Theri 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 and 30 look this that this is wanting if you understand I look this victory 522436 the answer it 12 thankyou
The gravitational field on Saturn is 10.4 times its value on Earth.
a. What would a 100.0-kg mass weigh on Saturn?
b. If the gravitational field on the surface of Pluto is 0.08 times that of Mercury, what would a 7.0-kg mass weigh on Pluto?
Show all work!!
The weight of 100 kg mass on Saturn is 10,192 N.
The weight of 7.0 kg mass on Pluto is 2.01 N.
The given parameters;
acceleration due to gravity, = 10.4gmass of the Saturn, m = 100 kgacceleration due to gravity on mercury, = 3.59 m/s²The weight of 100 kg mass on Saturn is calculated as follows;
W = mg
W = 100 x 10.4 x 9.8
W = 10,192 N
The weight of 7.0 kg mass on Pluto is calculated as follows;
W = 7 x 0.08 x 3.59
W = 2.01 N
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Zeb was lifting a box onto a moving truck. He lifted with a net force of 2000N and the box had a mass of 100 kg. What was the resulting acceleration?
Answer:
20 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
f is the force
m is the mass
From the question we have
[tex]a = \frac{2000}{100} = 20 \\ [/tex]
We have the final answer as
20 m/s²Hope this helps you
NEED ANSWER FAST
A person pushes a 11.5KG lawn mower with an applied force of 70.0N along the 45.0-degree-handle. if the lawn mower moves at a constant velocity
Determine the net force on the mower:
Fnet=__N
Determine the horizontal component of applied force on the mower:
Fx=__N (round to 3 digits)
Determine the horizontal frictional force acting on the mower
Ff=__N (Round to 3 digits)
Calculate the applied force the person must exert on the mower for it to accelerate at a rate of 1.00m/s^2
F=__N (round to 3 digits)
Force is a vector quantity hence it can be resolved into a vertical and a horizontal components.
1) The horizontal component of the applied force is given by;
Fnet = F cos θ
Fnet = 70.0N × cos (45.0)
Fnet = 49.5 N
2) The horizontal component of the frictional force is;
F = -Ff + mgsinθ
F = applied force
Ff =mgsinθ - F
Ff = (11 × 10 × sin 45) - 49.5
Ff = 28.3 N
Horizontal component of Ff
28.3 N cos 45 = 19.9 N
3) The applied force is given by;
F = 11 Kg × 1.00m/s^2 = 11.0 N
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Help if you understood pleas and rhanks
Answer:
the velocity is 4 ms, if it asked for change it be 0 m/s but its asking for velocity so option 4, 4m/s
Explanation:
The correct answer is Option 2: 2 m/s². The acceleration of the object at 8 seconds is 2 m/s². Note that the negative sign indicates that the acceleration is in the opposite direction of the velocity.
To calculate the acceleration of the object at 8 seconds, we need to look at the change in velocity over time (acceleration is the rate of change of velocity).
Given the graph, we can see that at 8 seconds, the velocity of the object is 6 m/s.
Now, let's find the change in velocity between 8 seconds and 10 seconds:
Change in velocity = Final velocity - Initial velocity
Change in velocity = 2 m/s - 6 m/s
Change in velocity = -4 m/s
Next, find the time interval between 8 seconds and 10 seconds:
Time interval = Final time - Initial time
Time interval = 10 s - 8 s
Time interval = 2 seconds
Now, calculate the acceleration:
Acceleration = Change in velocity / Time interval
Acceleration = (-4 m/s) / (2 s)
Acceleration = -2 m/s²
The correct answer is Option 2: 2 m/s². The acceleration of the object at 8 seconds is 2 m/s². Note that the negative sign indicates that the acceleration is in the opposite direction of the velocity.
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A plant uses carbon dioxide and water to form food and oxygen. Why is this a chemical change?
Answer:
because when the plant inhales c02 it exhales oxgen
Explanation:
Answer:
The properties of carbon dioxide and oxygen are different.
Explanation:
A chemical change is defined as something that changes the substance of something (such as the creation of water from hydrogen and water), and can be figured out if chemical or physical based on different changes and properties. Your answer will be The properties of carbon dioxide and oxygen are different because these are two different elements (compounds in case of CO2) that combine to form a different substance, thus changing the identity of the substance.
Photosynthesis is a chemical reaction that occurs in plants by using radiant energy from sunlight. In this chemical reaction, carbon dioxide from the atmosphere and water from the soil are combined to produce sugar (glucose) that contains stored chemical energy.
How is temperature related to the physical change of a substance
Answer:
Temperature is a measure of the kinetic energy of particles in a substance. As temperature increases, the atoms or molecules in a substance gain energy. As temperature decreases, the particles lose energy. A change in the energy of particles causes a change in their arrangement. A change in the arrangement of particles can lead to a physical change.
Explanation:
Brainliest pls
Which statement is true about vectors?
Vectors need direction and magnitude to exist, otherwise, it becomes scalars that do not require direction to be expressed.
eg - Velocity is a vector as it needs direction, but speed is scalar and does not need direction
hope this helps
Answer:
a. All quantities in physics are not vectors. b. A vector may have either magnitude or direction. c. The vector's length should be proportional to its magnitude. d. Two vectors can be added only if they have the same direction.
It took 50 joules to push a crate 2.5 meters. With what force was the crate pushed?
It took 50 joules to push a crate 2.5 meters. With what force was the crate pushed?
physics
is my choice correct?
correct me pls if not
Answer:
correct
Explanation:
if wrong sorry btw have a great day
A) half as much
B) as much
C) two times as much
D) three times as much
Answer:
3 times as much
Explanation:
half as much would be 12%, as much would be 24%, and two times as much would be 48%.
3 times as much is 72, which is about 74%
which type of energy is stored in chemical compounds and released in chemical reactions?
Answer:
potential
Explanation:
A subatomic particle that has a positive charge and that is located in the nucleus of an atom
Proton
Neutron
Electron
Nucleus
Answer:
c
Explanation:
Answer:
protons have a positive charge
Explanation:
neutrons have no charge
electrons have negative charge
When is the acceleration of a body is positive, negative and zero?
Answer:
it is 0 lol
Explanation:
a bus starts to move from rest. if its velocity becomes 90 km per hour after 8s second. calculate acceleraton
answer is 3.13ms-2
90 km per hour = 25 metres per second
[tex]a=\frac{v-u}{t}[/tex]
[tex]a=\frac{25-0}{8}[/tex]
[tex]a=3,13m/s^2[/tex]
Write the following as powers of ten with one figure before the decimal point:
a 100000
b 3500
c 428000000
d 504
e 27056
car starts from rest and reaches a velocity of 10 m/s in 10s a) Draw the v against t graph for the motion of the car? b) From the graph find: i) the slope of the graph. II) Area of the v against t graph bounded by the slope, on x-axis. c) What are the slope and area of v against t graph equal to respectively?
Explanation:
여기 당신의 대답이 있습니다. 즐겨 . 팔로우하고 브레인리스트로 표시해주세요
Answer:
The above answer is correct too, keep busy
hello, may you please help me
Calculate the percentage of water of crystallisation in Na2CO3•10H2O
Answer:
62.9%. The molar mass of sodium carbonate is 106 grams per mole. Each water molecule adds another 18.0 grams per mole.
Explain this phase diagram by relating what you know about temperature, states of matter and
pressure.
Answer:
See explanation
Explanation:
The vertical axis corresponds to the pressure of a substance, while the horizontal axis corresponds to the temperature. The solid is the substance which contains particles of strong intermolecular force and compaction, typically ionic at a certain temperature, the liquid is the substance which contains relatively compact molecules, however lacks a particular arrangement. The gaseous substance is caused by particles with weak intermolecular forces, causing particle movement and collision with no arrangement whatsoever. The triple point as shown in the diagram, is the phrase on a diagram where each substance: solid, liquid and gas coexist. The critical point is the phase at which the/a substance is indistinguishable between liquid and gaseous states. A substance or elements state is highly dependent on its environment and it’s temperature, of which ultimately affects its kinetic energy within its particles. This is what the graph portrays and represents.
Hopefully I have aided you, and I apologize for the relatively late response.
would you say the rate if cell growth is increasing or decreasing explain.
how can you reduce the percentage uncertainty in measurements that you make?
Answer:
you can decrease the uncertainty by making the same measurement multiple times and taking the average.
Explanation:
what is the angular speed of the tip of the minute hand on a clock, in rad/s?
Answer:
0.10472 radians/minute
Explanation:
It completes a full rotation around that circular clock in 60 minutes. So the angular speed of the minute hand is 2 * pi / 60 = pi / 30 = 0.10472- radians/minute .
The angular speed is the ratio of angular displacement to time. Then the angular speed is π/1800 radians per second.
What is angular speed?The rate of change of angular displacement is called angular speed.
We know that the angular speed formula
[tex]\rm Angular \ speed = \dfrac{Angular \ displacement }{time}[/tex]
The angular speed of the tip of the minute hand on a clock, in rad/s, will be given as
We know that in one hour it rotates 360 degrees or 2π. And in one hour we have 3600 seconds. Then the angular speed will be
[tex]\rm Angular \ speed = \dfrac{2\pi}{3600}\\\\\\Angular \ speed = \dfrac{\pi}{1800}[/tex]
More about the angular speed link is given below.
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