Answer:
Explanation:
We do not know because we do not know what the throw angle was.
If we ASSUME a horizontal throw,
time to drop from vertical rest.
t = √(2h/g) = √(2(305)/9.8) = 7.89 s
horizontal distance covered
d = vt = 4.9(7.89) = 38.658... which rounds to 39 m
hopefully his co-workers are under cover as the velocity at ground impact would be 77 m/s or 278 km/hr ... speeds which could cause severe injury or death from the impact of an empty aluminum can. Fortunately real air resistance will reduce the terminal velocity greatly. Still a stunt that would get most workers fired immediately.
A bicycle wheel is rotating with an angular velocity of 15 rad/s. The wheel has a mass of 4.9 kg and a radius of 48.6 cm. Treat the wheel as a solid thin disc.
a. Calculate the rotational kinetic energy of the wheel in J.
b. Calculate the angular speed the wheel must have if its rotational kinetic energy is doubled, in rad/s.
Answer:
a) kinetic energy = 130.2j
b) angular velocity when kinetic energy is doubled = 21.2rad/s
The primary coil of a transformer has 2650 volts and a current of 66 A. What current is in the secondary coil if it has 4700
volts?*
12 =
A
*Round your answer to the nearest thousandth if necessary.
Answer:
117.06 A
Explanation:
V = IR
2650 = 66(R)
2650/66 = R
40.15 = R
V = IR
4700 = I(40.15)
4700/40.15 = I
117.06 = I
P= 2/3(N/V)1/2mv^2
Solve for v
your question:
P= 2/3(N/V)1/2mv^2 Solve for v
answer:
v=√2Vem
You have a 7 cubic foot container filled with mercury that you need to ship to have incinerated at a lab. What is the size of your container in cubic meters?
The size of your container in cubic meters is 0.1981.
Given the following data;
Size = 7 cubic footIn this exercise, you're required to convert the size of a 7 cubic foot container filled with mercury to cubic meters. Thus, we would convert the given size of the container in cubic foot to cubic meters.
Conversion:
1 cubic foot = 0.0283 cubic meter
7 cubic foot = X cubic meter
Cross-multiplying, we have;
X = [tex]0.0283[/tex] × [tex]7[/tex]
X = 0.1981 cubic meter.
Therefore, the size of your container in cubic meters is 0.1981.
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5. A researcher is studying the intensity of hurricanes that entered the Gulf of Mexico between 1975-2015 and the average water temperature of the Gulf of Mexico at the hurricane's peak strength. What is the independent and dependent variable in this study?
Answer:
The independent variable is that entered by the researcher - it does not depend on anything else in the equation
The dependent variable is the result obtained by applying the equation to the independent variable
One variable is entered by the researcher giving rise to the second variable.
In the study given the intensity depends on the average water temperature.
The independent variable is the water temperature and the dependent variable is the maximum strength of the hurricane
In scientific research processes there are several types of variables
* Those that can be controlled or manipulated by researchers, these are called independient variable
* The variables that are measured in the investigation are called dependent variables, these are influenced by the values of the independent and intervening variables
* There is a third type of variable called intervening that affect the results but cannot be identified or controlled by the researchers.
Based on this definition for this case the independent variable must be temperature, even though the researcher cannot control it directly, he can measure its value.
The dependent variable is the intensity or maximum strength and the number of hurricanes that can be measured by the researcher and create a relationship between the intensity as a function of the gulf water temperature.
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State the two laws of electromagnetic induction, and state them.
what is transverse wave
Answer:
In physics, a transverse wave is a wave whose oscillation is perpendicular to the direction of propagation of the wave.
hope that helped.
In a transverse wave, the wiggles are up and down.
In a longitudinal wave, the wiggles are back and forth.
A difference between final and original position in a straight line
Answer:
For straight line motion, positions can be shown using a number line. The separation between original and final position is called displacement.
EXPLANATION:For straight line motion, positions can be shown using a number line. The separation between original and final position is called displacement.
A car is traveling along a straight road at a velocity of +30.6 m/s when its engine cuts out. For the next 1.70 seconds, the car slows down, and its average acceleration is. For the next 4.56 seconds, the car slows down further, and its average acceleration is. The velocity of the car at the end of the 6.26-second period is +17.0 m/s. The ratio of the average acceleration values is = 1.55. Find the velocity of the car at the end of the initial 1.70-second interval.
The velocity of the car at the end of the initial 1.70-second interval is 25.6 m/s
Let's evaluate every step
1. Step 1
[tex]v_{i}_{1}[/tex]: initial velocity at step 1 = 30.6 m/s
[tex]v_{f}_{1}[/tex]: final velocity at step 1
[tex]t_{1}[/tex]: time at step 1 = 1.70 s
[tex]a_{1}[/tex]: average acceleration at step 1
The average acceleration in this step is given by:
[tex] a_{1} = \frac{v_{f_{1}} - v_{i_{1}}}{t_{1}} [/tex] (1)
2. Step 2
[tex]v_{i}_{2}[/tex]: initial velocity of step 2 = [tex]v_{f}_{1}[/tex]
[tex]v_{f}_{2}[/tex]: final velocity at step 2
[tex]t_{2}[/tex]: time at step 2 = 4.56 s
[tex]a_{2}[/tex]: average acceleration at step 2
The average acceleration is the following:
[tex] a_{2} = \frac{v_{f_{2}} - v_{i_{2}}}{t_{2}} [/tex] (2)
3. Step 3
This step is given by the sum of step 1 and step 2
[tex]v_{f}[/tex]: final velocity after 6.26 s = 17.0 m/s = [tex]v_{f}_{2}[/tex]
t = t₁ + t₂ = 1.70 s + 4.56 s = 6.26 s
The ratio of the average acceleration is:
[tex] \frac{a_{1}}{a_{2}} = 1.55 [/tex] (3)
By dividing equation (1) into equation (2) we have:
[tex] \frac{a_{1}}{a_{2}} = \frac{\frac{v_{f_{1}} - v_{i_{1}}}{t_{1}}}{\frac{v_{f_{2}} - v_{i_{2}}}{t_{2}}} [/tex]
[tex] \frac{a_{1}}{a_{2}} = \frac{t_{2}(v_{f_{1}} - v_{i_{1}})}{t_{1}(v_{f_{2}} - v_{f_{1}})} [/tex]
By solving the above equation for [tex]v_{f_{1}}[/tex] we have:
[tex]v_{f_{1}} = \frac{\frac{a_{1}}{a_{2}}v_{f_{2}}t_{1} + v_{i_{1}}t_{2}}{\frac{a_{1}}{a_{2}}t_{1} + t_{2}} = \frac{1.55*17.0 m/s*1.70 s + 30.6 m/s*4.56 s}{1.55*1.70 s + 4.56 s} = 25.6 m/s[/tex]
Therefore, the velocity of the car at the end of the initial 1.70-second interval is 25.6 m/s.
You can see another example of average acceleration here: https://brainly.com/question/17050461?referrer=searchResults
I hope it helps you!
Urkar is driving down the street at 11 m/s. What acceleration is required for him to slow to a stop in 2 s?
Answer:
-5.5m/s^2
Explanation:
Well first of all, we know that velocity is a vector, therefore acceleration is a vector. And since urkar is slowing down, the acceleration will be negative
V1 = 11m/s
V2 = 0m/s ( bcuz they said to a stop)
t = 2s
a = V2 - v1
- - - - - - - - - -
t
a = 0 - 11
- - - - - - -
2
= - 5.5ms^-2
Convert 4 centimeters to meters using dimensional analysis and scientific notation. Please go step by step as I am having difficulty with this subject.
Answer:
[tex]thank \: you[/tex]
.
BONUS: Usain Bolt speeds up from 0 m/s to 22 m/s in
55 seconds. What is his acceleration in meters per
minute (Round answer to nearest whole number)?
Answer:
0.4 meters per second I believe
Therefore, they
experience a
and produce
surface tension.
Answer:
Explanation:
2. Below are four velocity vs. time graphs. Which graph represents the motion of an object that
has a constant positive acceleration? Explain why you chose that graph.
See picture, thanks!
Answer:
Answer (b)
Explanation:
Acceleration is the rate of change of velocity in time, therefore constant acceleration will be changing velocity in direct proportion to time and will have a linear plot on a velocity/time chart. This eliminates answer (d) which has an increasing acceleration in time
answer (a) has a negative slope so the acceleration would be considered negative
answer (c) has zero slope so acceleration is zero and velocity is constant.
answer (b) has the required positive slope and acceleration
31. Calculate the instantaneous speed of an
apple that falls freely from a rest position and
accelerates at 10 m/s2 for 1.5 seconds.
We have that the the instantaneous speed is given as
[tex]v=15m/s[/tex]
From the Question we are told that
Calculate the instantaneous speed
Accelerates at
[tex]a=10 m/s2 \\\\t= 1.5 seconds.[/tex]
Generally the equation for the instantaneous speed is mathematically given as
[tex]v=\frac{d}{t}[/tex]
Acceleration
[tex]a=\frac{v}{t}[/tex]
Therefore
[tex]v=10*1.5\\[/tex]
[tex]v=15m/s[/tex]
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Which definition best explains science? (1 point)
Answer: c is the correct answer
Explanation:
Option C is the correct answer.
Definition of Science: A way of discovering and knowing about the world.
Science
Science can be defined as the knowledge and understanding of the natural and social world following a systematic methodology based on evidence.
The scientific methodology includes objective observation, measurement and data evidence.
Science is a system of observations and experiments used to gain knowledge about how the universe works. Observations describe how and why things happen the way they do. Experiments are investigations used to explain how the world works.
Hence option C represents the best definition.
To know more about science, follow the link given below.
https://brainly.com/question/935949.
Identify two factors that determine the state of matter
the kinetic energies of the particles (atoms,molecule,or ions)that make up up a substance. kinetic energy tends to keep the particles moving apart.
the attractive inter molecular forces between particles that tends to draw the particles together.
Which term best describes a fad diet
Answer:
a fad diet is basically a diet that was a trend or that was popular for a short amount of time and makes unreasonable claims for fast and very much wanted results
Explanation:
Something that accelerates undergoes a
A. Change in velocity per unit time
B. Change in direction
C. Change.
D. Change in velocity
Change in velocity per unit time.
Explanation
Acceleration is defined as rate of change of velocity w.r.t time.
[tex]\boxed{\sf Acceleration=\dfrac{dv}{dt}}[/tex]
a 60g tennis ball travelling at 30m/s hi a wall and bounce back at 20m/s.calculate (a)momentum of the ball before impact (b)momentum of the ball after impact
Explanation:
the formula for momentum is denoted by p=mv where p is momentum, m is mass and v is velocity. thus, the velocity before impact would be 0.060 x 30 = 1.8 kg/ms
the second one would just be 0.060 x 20 0.72kg/ms
I'm not 100 percent sure this is correct but yeah
Which statement is true?
The combustion of biomass can replace fossil fuels in conventional power plants.
Hydroelectric energy uses the energy from the sun, which is a renewable resource.
Oil is a non-renewable resource that is hardly ever used, so there is not a concern of depleting the Earth's supply.
Solar energy is a non-renewable resource that is used by many countries all over the world.
Answer:
Hello,
The combustion of biomass can replace fossil fuels in conventional power plants, which is true.
I hope I helped you :)
Which phrase is the best definition of energy
Answer:
The capacity for doing work.
Explanation:
It has the forms kinetic, potential, thermal, electric, nuclear or other forms of energy.
In physics, the ability to do work is referred to as energy. It can be of several types like thermal, electrical, chemical etc.
What is Energy?The capacity to perform work is known as energy in physics. Potential, kinetic, thermal, electrical, chemical, nuclear, and other types are all possible. As energy is transferred from one body to another, there is also heat and work. Energy is always categorized after it has been transferred based on its nature. As a result, heat transfer may result in thermal energy, whereas labor may result in mechanical energy.
Motion is a common feature of all energy types. Whenever a body is in motion, for instance, it contains kinetic energy. Even while at rest, a tensioned object like a spring or bow can move; this is because of the configuration of the object, which carries potential energy.
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what is theory of kinematics ??
this question hasn't been asked lol -,-
The branch of physics that defines motion with respect to space and time, ignoring the cause of that motion, is known as kinematics. Kinematic equations are a set of equations that can derive an unknown aspect of the motion of a body if the other aspects are provided.
Hope This Helps YouConvert the following in to SI units without changing its values
A. 4000 g
b. 2.4 km
A. The S.I unit of mass is kg . therefore we have to convert 4000g into kg from gram
i.e 4000g = 4 kg
B. The S.I unit of length is meter. so we have to convert 2.4 km into meters,
i.e 2.4 km = 2400 m
#A
[tex]\boxed{\sf 1kg=1000g}[/tex]
[tex]\\ \sf\longmapsto 4000[/tex]
[tex]\\ \sf\longmapsto \dfrac{4000}{1000}[/tex]
[tex]\\ \sf\longmapsto 4kg[/tex]
#B
[tex]\boxed{\sf 1km=1000m}[/tex]
[tex]\\ \sf\longmapsto 2.4km=2.4(1000)[/tex]
[tex]\\ \sf\longmapsto 2400m[/tex]
In Physics what's does cos and sin stand for?
Answer:
Sin = Sine
Cos = Cosine
Explanation:
Sin(θ) = Opposite/Hypotenuse
Cos(θ) = Adjacent/Hypotenuse
In reaching her destination, a backpacker walks with an average velocity of 1.34 m/s, due west. This average velocity results because she hikes for 6.44 km with an average velocity of 2.68 m/s, due west turns around, and hikes with an average velocity of 0.447 m /s, due east. How far east did she walk
We can define average velocity as:
av = (total distance travelled)/(total time)
Only using the above equation, we will find that she walked 807.3m due east.
The given information is:
The average velocity is 1.34 m/s due west.
(we can define west as the positive side and east as the negative side).
We know that first, she hikes 6.44km due west with an average velocity of 2.68 m/s.
To get the total time it took we write the equation:
2.68 m/s = (6,440m)/(time)
time = 6,440m/(2.68 m/s) = 2,402.9 seconds.
Then she hikes a distance D due east with an average velocity of 0.447 m/s, because she goes due east, we will write -D in the equations.
Now using the same equation as before, we can get the time as:
time' = -D/(-0.447 m/s) = D/(0.447 m/s)
Now the equation for the total average velocity will be:
1.34 m/s = (6,440m - D)/(2,402.9 s + D/(0.447 m/s))
Now we need to solve this for D.
(1.34 m/s)*(2,402.9 s + D/(0.447 m/s)) = (6,440m - D)
(1.34 m/s)*(2,402.9 s) + (1.34 m/s)*(D/(0.447 m/s) =6,440m - D
(1.34 m/s)*(D/(0.447 m/s) + D = 6,440m - (1.34 m/s)*(2,402.9 s) = 3,229.1 m
D*(1 + (1.34m/s)/(0.447 m/s)) = 3,229.1 m
D*4 = 3,229.1 m
D = 3,229.1 m/4 = 807.3 m
We can conclude that she walked 807.3m due east.
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We have that the total distance traveled by the backpacker is
[tex]d_t=5.6km[/tex]
From the Question we are told that
Total Average velocity [tex]V_{avg}= 1.34 m/s,[/tex]
Distance [tex]d=6.44 km[/tex]
First average velocity [tex]V_{1 avg}= 2.68 m/s,[/tex]
Second average velocity [tex]V_{2 avg}= 0.447 m /s[/tex]
Generally the equation for Total Distance is mathematically given as
[tex]d_t=d_1+d_2\\\\V_tT_t=(v_1t_1)+(v_2t_2)[/tex]
Where
[tex]t_1=\frac{d_1}{t_1}\\\\t_1=\frac{6440m}{2.68}\\\\t_1=2400s[/tex]
Therefore
[tex]V_tT_t=(v_1t_1)+(v_2t_2)[/tex]
[tex]1.34(T_t)=(2.68(2400))+(-(0.447t_2))[/tex] ...(due to change in direction)
[tex]1.34t_1+1.34t_2=6440-0.447t_2[/tex]
[tex]t_2=1804s[/tex]
Hence, the distance covered by her is
[tex]d_t=d_1+d_2\\\\d_t=(2.68(2400))+(-(0.447(1804)))\\\\d_t=5625.612m[/tex]
[tex]d_t=5.6km[/tex]
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If Sally could drive a Jetson's flying car at a constant speed of 530.0 km/hr across oceans and space, approximately how long (in years) would she take to drive to a solar system object 10.0 AU away
List three forms of energy and how used
Which of the following can be excluded when evaluating the reliability of a source? (1 point)
O accuracy of data
O timeliness of information
O purpose of the author
O length of content
D. Length of content.
Reliable sources need to be accurate, they need to make sense at the time they were created and the author needs to not be biased with their writing. It does not matter how long the content is as long as it is reliable.
URGENT!!!!!!!
PLEASE HELP WITH THIS PHYSICS PROBLEM
Explanation:
Let
[tex]x_1[/tex] = distance traveled while accelerating
[tex]x_2[/tex] = distance traveled while decelerating
The distance traveled while accelerating is given by
[tex]x_1 = v_0t + \frac{1}{2}at^2 = \frac{1}{2}at^2[/tex]
[tex]\:\:\:\:\:= \frac{1}{2}(2.5\:\text{m/s}^2)(30\:\text{s})^2[/tex]
[tex]\:\:\:\:\:= 1125\:\text{m}[/tex]
We need the velocity of the rocket after 30 seconds and we can calculate it as follows:
[tex]v = at = (2.5\:\text{m/s}^2)(30\:\text{s}) = 75\:\text{m/s}[/tex]
This will be the initial velocity when start calculating for the distance it traveled while decelerating.
[tex]v^2 = v_0^2 + 2ax_2[/tex]
[tex]0 = (75\:\text{m/s})^2 + 2(-0.65\:\text{m/s}^2)x_2[/tex]
Solving for [tex]x_2,[/tex] we get
[tex]x_2 = \dfrac{(75\:\text{m/s})^2}{2(0.65\:\text{m/s}^2)}[/tex]
[tex]\:\:\:\:\:= 4327\:\text{m}[/tex]
Therefore, the total distance x is
[tex]x = x_1 + x_2 = 1125\:\text{m} + 4327\:\text{m}[/tex]
[tex]\:\:\:\:= 5452\:\text{m}[/tex]
