La posición vertical del proyectil es:
y = 50 m/s sen37° - 1/2 . 10 m/s² t²; sen37° ≈ 0,6
Omito las unidades:
y = 30 t - 5 t²;
Según el enunciado es y = 25
Luego 25 = 30 t - 5 t²; o bien t² - 6 t + 5 = 0
Es una ecuación de segundo grado en t, que resuelvo directamente:
t = 1 s, t = 5 s
Pasa por primera vez en 1 s (subiendo)
Pasa por segunda vez en 5 s (bajando)
What is the time period of a 40 Hz wave?
Answer:
0.025 secs
Explanation:
Answer:
The formula for time is: T (period) = 1 / f (frequency). λ = c / f = wave speed c (m/s) / frequency f (Hz). The unit hertz (Hz) was once called cps = cycles per second.
Explanation:
~Cornasha_Weeb
The brightness of a light bulb is most closely related to
a ) Its resistance
b) The current through it
c) The voltage drop across it
d) The power dissipated by it.
Answer:
a ) Its resistance
Explanation:
It depends on current and resistance
How is electricity generated and transmitted to provide electricity to homes.
Answer:
Electricity generated at the power plant reaches our homes through multiple substations, transmission and distribution lines, and transformers. Newly generated electricity is transmitted at extremely high voltages ranging from 275,000 to 500,000 volts in order to reduce transmission losses.A motor pushes a car with a force of 35 N for a distance of 350 m in 6 s.
a. How much work has the motor accomplished?
Answer:
2041.66666667
Explanation:
35 N → 350 METERS for 6 seconds
force distance
350 M / 6s = 58.3
58.3 x 35 N = 2041.66666667 work
HELP! how did michael jordan influence future basketball players to make prodcuts?
Answer:
By encouraging them.
Explanation:
#CARRYONLEARNING
Answer:
His ability to soar to the basket and do things we'd never before seen captured the world's attention and helped make basketball more of a global sport than it had ever been. His reverse layups, slam dunks, and fadeaway shots were exciting to say the least.
Explanation:
Which of the following pictures shows a ray reflecting off a concave mirror?
Select one:
a. A
b. B
c. C
d. D
Answer:
A
Explanation:
A 5 kg toy truck moves to 2 m/s east , it colllides head-on with a2kg toy car moving 5 m/s moving west . What is the total momentum of the system?
A) kgm/s 30
B) kgm/s 0
C) kgm/s -20
D) non of it
Momentum
eastward = +
westward = -
[tex]\tt P_A=5\times 2=10~kg.m/s\\\\P_B=2\times 5=-10~kg.m/s[/tex]
total momentum:
[tex]\tt P_A+P_B=10-10=0~kg.m/s[/tex]
Determine the change in velocity of a car that starts at rest and has a final velocity of
20 m/s north.
answer:
20-0
=20
Explanation:
from rest initial velocity is zero.
final velocity is 20
hence change in velocity is;
20-0
=20
A 2.60 kg block is in equilibrium on an incline
of 24.3◦
.
The acceleration of gravity is 9.81 m/s
2
.
What is Fn of the incline on the block?
Answer in units of N.
Answer:
W = m g = 2.60 * 9.81 = 25.5 N weight of block
Fn = W cos theta = 25.5 N * cos 24.3 = 23.2 N normal force of plane
If the jet fighter in #3 is traveling at a height of 10,000 meters, what would the potential energy be?
Answer:
5,0000
Explanation:
because if u divide the 10 by 2 possible it will be 5 so u add your zero
The potential energy of the fighter jet of mass 'm' at a height of 10000 meters will be 98000m.
What is Potential energy of a body?The energy of the body due to its position is called potential energy. If a body of mass 'm' is at height 'h' above the ground, then its potential energy with respect to earth will be -
E[P] = mgh
Given is a fighter jet traveling at a height of 10,000 meters.
The potential energy of a body at height 'h' above the ground is given by-
E[P] = mgh
where -
m is the mass of body
g is the acceleration due to gravity
Assume that the mass of jet fighter is 'm'. Then its potential energy will be -
E = mgh
E = m x 9.8 x 10000
E = 98000m
Therefore, the potential energy of the fighter jet of mass 'm' at a height of 10000 meters will be 98000m.
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A complete vibration occurs with a motion away from a point, to the other side of the equilibrium position, and back again to the starting point; this complete vibration is called a
Answer:
A complete vibration is called a "period".
Starting at 0, the particle would move to +A, back to zero, to -A and back to zero to complete one cycle of a vibration
The diameter of earth is largest when measured around the.
Answer:
equator
Explanation:
The diameter of earth is largest when measured around the equator, due to the equatorial bulge.
The equatorial bulge is a phenomenon caused by the Earth's diameter being wider in the Equator.
A straight line with its endpoints located on the edge of the circle and its center is used to calculate the diameter of a circle. Latitudes like the equator and the Arctic Circle have diameters that can be calculated by scientists.
The Equator is the place on Earth where it is the broadest. At the equator, the circumference of the Earth is 40,075 km.
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The mass of the Sun is 1. 99 × 1030 kg. Jupiter is 7. 79 × 108 km away from the Sun and has a mass of 1. 90 × 1027 kg. The gravitational force between the Sun and Jupiter to three significant figures is × 1023 N.
The gravitational force is s type of force that has the ability to attract any two objects having mass. The gravitational force will be [tex]4.16\times10^{23}[/tex].
What is the gravitational force?The gravitational force is s type of force that has the ability to attract any two objects with mass. Gravitational force tries to pull two masses towards each other.
[tex]F= G\frac{m_1m_2}{r^{2} }[/tex]
Given,
mass of the sun ([tex]m_1[/tex])= [tex]1.99\times10^{23}[/tex] kg
mass of Jupiter([tex]m_2[/tex])= [tex]7.79\times10^{8}[/tex] kg
distance between the sun and Jupiter (r)= [tex]1.90\times10^{27}[/tex] m
[tex]F= G\frac{m_1m_2}{r^{2} }\\\\\\F=4.16\times10^{23}\times\frac{1.99\times10^{23}\times7.79\times10^{8}}{({1.90\times10^{27})^2} }[/tex]
[tex]F= 4.16\times(10)^{23}[/tex] Newton
Hence the gravitational force between the sun and Jupiter will be [tex]4.16\times10^{23}[/tex]
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Why are yet planes faster tharn. cargo planes?
Answer:
cargo planes hold cargo so there hevier
Explanation:
what is the temperature of a wave that has a wavelength of 5 m?
So, the temperature of a wave that has a wavelength of 5 m is [tex] \boxed{\sf{5.796 \times 10^{-4} \: K}} [/tex]
IntroductionHi ! Here, I will help you to explain about The relationship between temperature and electromagnetic wavelength uses the principle of Wien's Constant. According to Wien, if we multiply temperature with the electromagnetic wavelengths will always got the same number (constant). Therefore, The relationship is expressed in this equation :
[tex] \boxed{\sf{\bold{C = \lambda_{max} \times T}}} [/tex]
With the following condition :
C = Wien's constant ≈ [tex] \sf{2.898 \times 10^{-3} \: m.K} [/tex][tex] \sf{\lambda_{max}} [/tex] = wave at its longest point (m) T = absolute temperature (K)Problem SolvingWe know that :
C = Wien's constant ≈ [tex] \sf{2.898 \times 10^{-3} \: m.K} [/tex][tex] \sf{\lambda_{max}} [/tex] = wave at its longest point = 5 mWhat was asked :
T = absolute temperature = ... KStep by step :
[tex] \sf{C = \lambda_{max} \times T} [/tex]
[tex] \sf{2.898 \times 10^{-3} = 5 \times T} [/tex]
[tex] \sf{T = \frac{2.898 \times 10^{-3}}{5}} [/tex]
[tex] \sf{T = \frac{2.898 \times 10^{-3}}{5}} [/tex]
[tex] \sf{T = 0.5796 \times 10^{-3}} [/tex]
[tex] \boxed{\sf{T = 5.796 \times 10^{-4} \: K}} [/tex]
Conclusion :So, the temperature of a wave that has a wavelength of 5 m is [tex] \boxed{\sf{5.796 \times 10^{-4} \: K}} [/tex]
What is the standard unit used to measure mass?
Answer:
g or kg
Explanation:
Mass is typically measured in grams or in kilograms (1 kg = 1000 g)
Help!! DOWN BELOW
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SOLVE IT NOWPLS!
its AP Q
Answer:
B. the maximum velocity of the mass
Explanation:
The maximum velocity occurs at the equilibrium position (x=0) when the mass is moving toward x=+A .
What is the key difference between photoheterotrophs and photoautotrophs?.
Explanation:
What is the key difference between photoheterotrophs and photoautotrophs? Photoheterotrophs use organic compounds as their carbon source; photoautotrophs use carbon dioxide as their carbon source.
Describe Pulse wave. Short description
list 3 process that can change matter from one state to another
Answer:
evaporation, melting, freezing
Explanation:
matter is a solid, gas, or liquid
evaporation turns a liquid to gas
melting changes a solid to liquid
freezing changes a liquid to a solid
what is represented using a free body diagram
Answer:
a free body diagram (FBD; also called a force diagram) is a graphical illustration used to visualize the applied forces, moments, and resulting reactions on a body in a given condition.
What do you think causes such change in wave velocity?
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.
Which type of action forces cause a reaction force?
A. Only large action forces will cause a reaction force.
B. All forces cause a reaction force.
C. Only small forces cause a reaction force.
Answer:
B
from newton's law , for every action there is an equal and opposite reaction, regardless of the size of the force
A truck travels at a constant speed of 45 m/s. How much work did the truck engine do during a 2 hour period if it supplied a force of 25 kN of force.
The work the truck engine did during the 2 hour period is 8.1 × 10⁹ J
WorkFrom the question, we are to determine how much work the truck engine did
Work is given by the formula
Work = Force × Distance
First, we will determine the distance traveled by truck
From the formula,
Distance = Speed × Time
From the given information
Speed = 45 m/s
Time = 2 hours = 2×60×60 = 7200 secs
Then,
Distance = 45 × 7200
Distance = 324000 m
Now, for the work done
Work = Force × Distance
From the given information,
Force = 25 kN = 25000 N
Therefore,
Work = 25000 × 324000
Work = 8.1 × 10⁹ J
Hence, the work the truck engine did during the 2 hour period is 8.1 × 10⁹ J
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waste water can be purified naturally by
Answer:
waste water can be purified naturally by sunlight, temperature, filtration, adsorption, sedimentation, biodegradation,
Answer:
Filtration, sedimentation, or distillation
Describe an exothermic reaction involving sulphuric acid.
Answer: The hydration reaction of sulfuric acid is highly exothermic. If water is added to concentrated sulfuric acid, it can boil and spit dangerously. You should always add the acid to the water rather than the water to the acid for safety.
hope this helps!
50 N Vertical 10 N Horizontal Force X can you find force x?
Answer:
45
Explanation:
What is gravitational force
The force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface.
A 3.00 m long rod (I=1/3ML2) with a mass of 10.0 kg is set so that it pivots around its end. The rod is pulled back until it is horizontal and released. A small spherical ball with a mass of 4.00 kg is placed directly under the pivot point of the rod so that the end of the rod strikes the ball when it is vertical.
What is the angular velocity at the bottom before it hits the ball?
Hi there!
Assuming the rod is pulled back 90° (π/2 radians), we can use angular kinematics to solve.
Using the equation:
[tex]\omega_f^2= \omega_i^2 + 2\alpha \theta[/tex]
[tex]\omega_f[/tex] = final angular velocity (? rad/sec)
[tex]\omega_i[/tex] = initial angular velocity (0 rad/sec)
[tex]\alpha[/tex] = angular acceleration (rad/sec², must solve for)
[tex]\theta[/tex] = angular displacement (π/2 rad)
Recall Newton Second Law's rotational equivalent:
[tex]\Sigma \tau = I\alpha[/tex]
τ = Torque (Nm)
I = Moment of inertia (kgm²)
α = angular acceleration (rad/sec²)
Setting the pivot point at the end, and knowing that the force of gravity works at an object's center of mass (1.5m from the rod's end), we can solve for the angular acceleration.
[tex]\tau= F \times r\\\\\tau = W \times r = 10(9.8) * 1.5 = 147 Nm[/tex]
Now, solve for the moment of inertia given I = 1/3ML² at one of its ends:
[tex]I = \frac{1}{3}(10)(3^2) = 30 kgm^2[/tex]
Solve for the angular acceleration:
[tex]147 = 30\alpha\\\\\alpha = 4.9 \frac{rad}{sec^2}[/tex]
Now, we can use the kinematic equation to solve.
[tex]\omega_f^2 = 0 + 2(4.9)(\frac{\pi}{2}})\\\\\omega_f = \sqrt{2(4.9)(\frac{\pi}{2})} = \boxed{3.923 \frac{rad}{sec}}[/tex]