Answer:
Mass=3,time=15,height=50,g=10,Power=?.
Power=mgh/t.....3×10×15=1500/15=100Watts.
Answer:
[tex]\huge \boxed{\mathrm{100 \ Watts}}[/tex]
Explanation:
[tex]\sf \displaystyle P=\frac{mgh }{t} \\\\\\ P=power \ (W) \\\\ m=mass \ (kg) \\\\ g=gravity \ acceleration \ (m/s^2) \\\\ h=height \ (m) \\\\ t=time \ taken \ (s)[/tex]
[tex]\sf \displaystyle P=\frac{3 \times 10 \times 50 }{15}[/tex]
[tex]\sf \displaystyle P=\frac{1500 }{15}[/tex]
[tex]\sf \displaystyle P=100[/tex]
a dog walks 12 meters to the west and then 16 meters back to the east
Answer:
Explanation:
4 meters east
the diagram shows a ray of light being reflected by a plane mirror and one angle is 60 degrees.what will be the measure of its angle of incidence and angle of reflection?
Answer:
when the light is reflected from a surface the angles of incident is always equal to the angles of reflected where both angles are measures from the path of the light to the normal to the surface at the point at which light stricks the surface . this equality is known as the law of reflection .
Since the angle of reflection is 60 degrees, the angle of incidence is also 60 degrees.
What are the laws of reflection?The laws of reflection describe the behavior of light when it is reflected off a smooth surface, such as a plane mirror. There are two laws of reflection:
1. The angle of incidence is equal to the angle of reflection: When a light ray strikes a surface, the angle between the incoming ray and the surface (the angle of incidence) is equal to the angle between the reflected ray and the surface (the angle of reflection). This law holds true for all angles of incidence.
2. The incident ray, the reflected ray, and the normal to the surface all lie in the same plane: The normal is an imaginary line perpendicular to the surface at the point where the ray strikes the surface. The incident ray is the incoming ray of light, and the reflected ray is the ray that bounces off the surface. Both of these rays, along with the normal, all lie in the same plane.
These laws can be used to predict the path of reflected light and to determine the position and size of an image formed by a plane mirror. The angle of incidence and angle of reflection can be measured using a protractor, and the normal can be found by drawing a line perpendicular to the surface at the point of incidence.
Here in the Question,
According to the law of reflection, the angle of incidence (i) is equal to the angle of reflection (r), which means:
i = r
The angle of incidence = Angle of reflection = 60 degrees.
Therefore, The angle of incidence is also 60 degrees since the angle of reflection is 60 degrees.
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i need help with this one 2 if you guys don’t mind
why do we accelerate forward when we run?
It depends on what direction you are running in, if it's forward, you'll have to keep to accelerating forward to keep running.
If you stop accelerating forward, you wouldn't be able to move forward.
A student leaves a sidewalk corner walks 3.0 blocks north then walks 3.0 blocks west.what is the students displacement from the starting position
Answer:
The students displacement is 3·√3 blocks, 45° North of West
Explanation:
From the question, we have;
The distance North in which the student walks = 3.0 blocks
The next walking distance West by the student = 3.0 blocks
The displacement of the student = The shortest distance between the student start and final point
By representing the motion of the student in vector format, we have;
[tex]\mathbf{d} = 3\cdot \hat{i} + 3\cdot \hat{{j}}[/tex]
Therefore the magnitude of d is given as follows;
[tex]\left | d\right | = \sqrt{3^2 + 3^2} = 3\cdot \sqrt{3} \ blocks[/tex]
The direction of the student = tan⁻¹(3/3) = 45° West of North
The students displacement = 3·√3 blocks, 45° North of West.
An atom with the expected number of neutrons, protons, and electrons is called a(n)
Answer:
Stable atom
Explanation:
A stable atom is one that has a balanced nuclear inter-particle force reaction as such the binding energy of a stable atom is sufficient to permanently keep the nucleus as one unit. Examples of a stable atom are the atoms of monoisotopic elements such as fluorine, sodium, iodine, gold, aluminium, and cobalt.
In a stable atom the expected number of proton, neutron, and electron are present while in an unstable atom or radioactive atom, there are more than the expected number of neutrons or protons, such that the internal energy of the nucleus is excessive and more than the binding energy, which can lead to radioactive decay.
If you were to measure your pulse rate while in a spaceship moving away from the Sun at a speed close to the speed of light, you would find that it was
Answer:
Your pulse rate will be the same as it was while you were on Earth.
Explanation:
Since you are on the ship, and you have the same speed with the ship, then, you'll observe your heart rate to be the same as your heart rate while you were on Earth. This is because there is no relative speed between you and the ship, since you're both on the same frame of reference.
If our Solar System was compressed by a factor of 10 billion such that the Sun is about the size of a grapefruit here in downtown Atlanta, then the nearest star (also about the size of a grapefruit) would be approximately at the distance of
Answer: 3,602.4 km
Explanation:
Ok, the distance between the sun and the nearest star is 4.22 light-years.
1 light-year = 9.461x10^12 km
4.22 light-years. = 4.4*(9.461x10^12 km) = 41.6284x10^12km.
Now, the radius of the Sun is:
r1 = 693,340 km
The radius of the grapefruit is around:
r2 = 6cm
Then in this new scale, 6 centimeters are equivalent to 693,340 km.
Now, how many times there are 693,340 km in 41.6284x10^12km?
We can take the quotient:
N = (41.6284x10^12km/ 693,340 km) = 60,040,384.
Then, the distance between the sun-grapefuit and the nearest star will be 60,040,384 times 6 centimeters:
Distance = 60,040,384*6cm = 360,242,304 cm ≈ 3,602.4 km
Newer aircraft jet catapult systems use magnets instead of steam. The launch still takes 1.19 seconds, but the acceleration is a about 47.41 m/s2. Determine the length of the runway on the carrier, assume the aircraft starts from REST
Answer:
33.6 m
Explanation:
Given:
v₀ = 0 m/s
a = 47.41 m/s²
t = 1.19 s
Find: Δx
Δx = v₀ t + ½ at²
Δx = (0 m/s) (1.19 s) + ½ (47.41 m/s²) (1.19 s)²
Δx = 33.6 m
Which equation can be used to solve for acceleration?
Answer:
The answer's A
Explanation:
Have a good day! :)
Option A is correct. the equation that can be used to solve the acceleration is expressed as [tex]t = \frac{\triangle V}{a}[/tex]
Acceleration is defined as the change in velocity of a body with respect to time. Mathematically;
[tex]a=\frac{\triangle V}{t}[/tex] where:
[tex]\triangle V[/tex] is the change in velocityt is the time takenMaking the time "t" the subject of the formula:
[tex]t = \frac{\triangle V}{a}[/tex]
Hence the equation that can be used to solve the acceleration is expressed as [tex]t = \frac{\triangle V}{a}[/tex]
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What is the mass of a car that has a kinetic energy if 4,320,000 J moving at 23 m/s?
Answer:
kinetic energy=1/2mv^2.
which is 4320000=1/2×m×23^2.
which is 4320000=1/2×m×529.
4320000=264.5m.
m=4320000/264.5.
m=16332.70~16333g
The mass of a car that has a kinetic energy of 4,320,000 J moving at 23 m/s would be 16332.70 Kg
What is mechanical energy?Mechanical energy is the combination of all the energy in motion represented by total kinetic energy and the total potential energy stored energy in the system which is represented by total potential energy.
Total mechanical energy is s the sum of all the kinetic as well as potential energy stored in the system.
ME = KE + PE
As given in the problem we have to calculate the mass of a car that has a kinetic energy of 4,320,000 J moving at 23 m/s
K.E = 4,320,000 J
v = 23 m/s
The total kinetic energy
KE = 1/2mv²
By substituting the respective values in the formula of kinetic energy
4,320,000 J =1/2m23²
m = 4,320,000×2/23²
m = 16332.70 Kg
Thus, The mass of a car that has a kinetic energy of 4,320,000 J moving at 23 m/s would be 16332.70 Kg
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A car starts from rest and acquires a velocity of 50m/s in 3secs. Calculate i) acceleration ii) distance covered.
Answer: 75.02 m
Explanation:
u = 0 ( starts from rest )
v = 50 m/s
t = 3 s
( i ) a = v - u / t
= 50 - 0 /3
= 16.67
( ii ) s = ut + 1/2 at²
= 0 × 3 + 1/2 × 16.67 × 3 × 3
= 75.02 m
Hope this helps...
The major changes in the state of the universe that occurred immediately after the Big Bang were in ______ and ______.
There are other equally good substitutes for exercise. True False
Answer:
B is the answer to this question
Answer:
True
Explanation:
For Example
Walking is a form of exercising without realising it
when you think you are creating blood flow which is oxygen which generates energy with that being said could be considered exercising no matter what you do in a result of energy in the body you are exercising.
How does air pressure help to inflate a football?
Answer:
When air is flushed into the ball, the elastic lining inside is expanded. This happens because when too much air enters, there is a lacking of space inside. Therefore the air with pressure pushes the walls of the ball and results in inflation.(same like after you have excess food your stomach inflates)
What is a tomato
Fruit
Root
Stem
None of these
It appears as though your vehicle is about to be hit on the right side (a broadside collision). What should you do to reduce damages from the collision?
Answer:
Turn the vehicle to the left, in order to reduce the momentum on the car during sackcloth
Explanation:
In the case of a collision on the right side, two things can be done to reduce the damage caused.
* Turn the vehicle to the left, in order to reduce the momentum on the car during sackcloth
* Decrease the speed, to have a less change in the amount of movement.
30. A generation is about one-third of a lifetime. Approximately how many generations have passed since the year 0 AD?
Answer:84 generations
Explanation:
A generation is about one-third of a lifetime. Approximately how many generations have passed since the year 0 AD? Approximately 84 generation.
If a car travels 23.8 meters in 4.2 seconds, what is its speed?
Put your units in the form of a correct abbreviation (example, write s for seconds, m
for meters, or m/s for meters per second).
As a increases and c stays constant, b does what
Answer:
b decreases as a increases and c stays constant
It all depends on the definitions of a, b, and c, and the relationship among them. Your question doesn't give us any of this information.
What is the volume of a box that is 3 m long, 0.5 m high, and 2 m wide?
Questions
3 pts
Convert 6.36 x 104 from scientific notation to standard decimal with the correct number of significant digits.
Answer:
Explanation:
standard decimal form of 6.36*10^4 is
6,3600.0
The microwave oven was invented in 1945 when some experiments with radar equipment failed and melted some nearby chocolate instead. The scientists realized there were other applications for this energy source. What is an example of.
Answer: Creative Thinking.
Explanation: Creative thinking this is a special ability possessed by individuals to see things differently or I’m a different dimension, and find new ways of solving problems. The fact it’s Creative thinking skills doesnt mean it’s for only 'creative types' like musicians. Everyone can also be a beneficiary of creative thinking from time to time. Just like in the case of the scientist above who saw an invention from his failed experiment.
Answer:
good thinking
Explanation:
gave the person above me brainy
I need the ans for this question QUICK PLEASE!!!
Explanation:
A) 1.05
B) 1.33
C) 1.16
D) 0.62
All units in cm
Bella makes the 6.1m distance to her food bowl in 8.8 seconds what is her average velocity
calculate the pressure of water in a well if the depth of water is 10m
p=d×h×g
p=1000×10×10
:.:p=100000 pa
Explanation:
p=Liquid pressure
d=Density
h=Height
g=acceleration due to gravity
T H A N K Y O U ! !
A water strider bug is supported on the surface of a pond by surface tension acting along the interface between the water and the bug’s legs. Assume the bug weighs 10−4 N and the surface tension force acts vertically upward. Determine the minimum length of the interface needed to support the bug
Answer:
minimum interface length = 1.36 mm
Explanation:
given data
weight of the bug = [tex]10^{-4}[/tex] N
solution
we will apply here Surface Tension formula that is
Surface Tension ,σ = Force ÷ length ........................1
and we consider here surface tension for water is 7.34 × [tex]10^{-2}[/tex] N/m
so that here minimum interface length needed to support the bug is
minimum interface length = Force ÷ σ
minimum interface length = [tex]10^{-4}[/tex] ÷ 7.34 × [tex]10^{-2}[/tex]
minimum interface length = 1.36 mm
How many seconds will it take for a satellite to travel 550 km at a rate of 130 m/s?
Answer:
4230.77s
Explanation:
We know: t=D/S, 550 km =550,000 m, so you can get the time by dividing 130 from 550000, you can get: 550000/130 approximately equals to 4230.77s. :) If I am correct, Mark the Brainlist, plz :D
It would take 4230.7692 seconds for a satellite to travel 550 km at a rate of 130 m/s
What is Velocity?The total displacement covered by any object per unit of time is known as velocity. It depends on the magnitude as well as the direction of the moving object.
The mathematical expression for velocity is given by
velocity= total displacement/Total time
As satellite has to travel 550 km
1Km =1000 m
550 km = 550000 m
Time is taken by satellite to travel 550000 m by velocity rate of 130 m/s
Time = displacement/velocity
=550000/130 seconds
=4230.7692 seconds
Thus, the satellite will take 4230.7692 seconds
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6. If a vehicle needs 5s to complete 15m. Find the mean speed of it?
3) 3ms
4) 20ms
1) 75ms
2) 10ms
Answer:
3m/s
Explanation:
Time=5s
Distance =15m
Speed=distance/time
Putting the values
Speed=15m/5s
Speed=3m/s is the answer
Hope it will help you. :)
A ball is shot into the air with initial speed of 40 m/s. How high will the ball go before falling back down?
A. 20m
B. 40m
C. 60m
D. 80m
Answer:
B. 40m
Explanation: