Answer:
18.5 m/s
Explanation:
Take down to be positive.
Given:
Δy = 10.0 m
v₀ = 12.0 m/s
a = 9.8 m/s²
Find: v
v² = v₀² + 2aΔy
v² = (12.0 m/s)² + 2 (10 m/s²) (10.0 m)
v = 18.5 m/s
The throwback PFD is which type?
Answer:a
Explanation:
The throwback PFD is a Type III PFD. This type of PFD is designed for calm, inland water, or where there is a good chance of quick rescue. THe correct option is C.
Type III PFDs will not turn unconscious wearers to a face-up position, so the wearer may have to tilt their head back to avoid turning face down.
Type III PFDs have the same minimum buoyancy as Type II PFD. Float coats, fishing vests, and vests designed for various water sports are examples of Type III PFDs. Some Type III PFDs are designed to be inflated upon entering the water.
Offshore life jackets of Type I are suited for all areas, notably open, choppy, or isolated regions where rescue may be delayed and offer the highest buoyancy. Near-shore vests of Type II PFDs are designed for calm inland water or situations where there is a good probability of prompt rescue. Throwable PFDs of Type IV are suitable for usage in open water as well as calm, heavily used inland waters where assistance is always available. Special-purpose PFDs known as Type Vs are made for activities like kayaking and whitewater rafting.
The throwback PFD is not a Type I PFD because it does not provide the most buoyancy and is not designed for all waters. It is not a Type II PFD because it is not intended for calm, inland water or where there is a good chance of quick rescue. It is not a Type IV PFD because it is not intended for calm, inland water with heavy boat traffic, where help is always present. It is not a Type V PFD because it is not designed for specific activities such as kayaking or whitewater rafting.
Therefore, the correct option is C. type III.
To learn more about PFDS click:
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The process of thinking that involves considering an overall general idea or theory and drawing specific conclusions or making specific predictions is called __________.
A. empiricism
B. deductive reasoning
C. scientific method
D. inductive reasoning
Answer:
Deductive reasoning
Explanation:
deductive reasoning
the process of thinking that involves considering an overall general idea or theory and drawing specific conclusions or making specific predictions about it
A golfer is teeing off on a 130.0 m long par 3 hole. The ball leaves with a velocity of 35.0 m/s at 35.0° to the horizontal. Assuming
that she hits the ball on a direct path to the hole, how far from the hole will the ball land (no bounces or rolls)?
Answer:
The ball will land 12.5m before that hole.
Explanation:
The motion of the golf ball can be considered as a projectile motion, where first its height is 0, then it keeps increasing to a maximum point, after which its height starts decreasing again and hits the ground (height becomes 0 again).
We need to calculate the Range (horizontal distance) of the ball which is given as:
[tex]R=\frac{v_i^2{\cdot}sin2\theta}{g}[/tex]
Where
v(i) = initial velocity = 35 m/s
θ = Initial angle = 35°
g = gravitational acceleration = 9.8 m/s
Substitute in the given formula to find Range:
[tex]R=\frac{(35)^2\cdot{sin}(2)(35)}{9.8}\\R=\frac{(1225)(0.94)}{9.8}\\R = 117.5~m[/tex]
Distance between the hole and position where ball lands = 130m - 117.5m = 12.5m
Heat always flows from a what place to a what place
Answer:
Heat is always the transfer of energy from an object at a higher temperature to an object at a lower temperature.
Explanation:
Answer:
Heat flows from high temperature to low temperature
Explanation:
the answer also may vary it can also be the heat flows from a warmer to colder place
hope this helped!
How does the velocity change with time in uniform rectilinear motion of an object?
3.If a force of 12 N is applied to an object with a mass of 2 kg, what will be its acceleration?
Answer:
6 m/s^{2}
Explanation:
The formula for force is
F = mass x acceleration
F = 12 N
mass = 2 kg
So, you can change the formula to solve for acceleration.
acceleration = F / mass
a = 12 N / 12 kg
a = 6 m/s^{2}
PLEASE HELP THIS IS MY LAST QUESTION!!! HELP ASAP!!
Which of these does NOT have gravity?
A. heat
B. an apple
C. a small moon
D. Earth's atmosphere
Answer: its A
Explanation: it cant be earths atmosphere because is it was we would be flouting
Answer:
a
Explanation:
In order to increase the speed in a gear system
the driven gear must be larger than the driving gear
the driving gear must be larger than the driven gear
the driving gear must be the same size as the driven gear
none of these
asap plz
plz asap
Answer:
the driving gear must be larger than the driven gear
Explanation:
How does the value of the electrostatic force vary with the value (how many) of the charges?
Answer:
Electrostatic force is directly proportional to the amount of charge on each body under consideration.
Electrostatic force increases with increase in charge.
Electrostatic force decreases with decrease in charge.
Explanation:
Electrostatic force is the force between 2 charges which can be explained by the Coulomb's Law:
F= K (q₁)(q₂)/r²
Where
F= Electrostatic Force
K = Constant of Proportionality
(q₁) and (q₂) = Amount of charge on each body
r = Distance between two bodies carrying charge
If the value of (q₁) or (q₂) is increased considering the other factors remain constant, the value of F will also increase.
And vice versa.
Can someone give me a situation where energy is being transferred, transformed or both? Thank you!
I WILL CHOOSE YOU AS BRAINLIEST
Use scientific evidence to outline how the Big bang theory can be used to explain the origin of the universe and its age.
Answer:
The widely accepted theory for the origin and evolution of the universe is the Big Bang model, which states that the universe began as an incredibly hot, dense point roughly 13.7 billion years ago.
A negative slope on the velocity vs. time graph indicates that the object is not
accelerating
A. True
B. False
Answer: False, I think
Explanation:
Well it depends. Its hard to say without a function of the graph. Given a velocity graph, the first derivative is the acceleration.
Negative slope on a velocity graph means you are going in the negative direction. And over time, your velocity per unit of time is also decreasing. That means we are accelerating in the negative direction
I WILL CHOOSE YOU AS THE BRAINIEST PLEASE ANSWER MY QUESTION
Identify that all objects exert a force of gravity on all other objects in the universe
Answer:
It's like the Earth pulling on you and keeping you on the ground. That pull is gravity at work. Every object in the universe that has mass exerts a gravitational pull, or force, on every other mass. The size of the pull depends on the masses of the objects.
Explanation:
ANSWER QUICK 40 POINTSSSS
QUESTION 6
Why are the moon’s craters preserved?
A)The moon is windy.
B)There are tectonic plates shifting on the moon.
C)Water preserves them.
D)There are no longer live tectonics occurring on the moon.
QUESTION 7
Why do you see only one side of the moon from Earth?
A)The moon does not rotate.
B)The moon takes longer to rotate than to revolve around Earth.
C)The moon takes less time to rotate than to revolve around Earth.
D)The moon’s period of rotation and revolution are equal.
QUESTION 8
What is the best description of the side of the moon that faces Earth?
A)random
B)The same
C)goes through cycles
D)changes
QUESTION 9
In what position are the moon, the earth, and the sun during the first quarter moon?
A)The moon is between the sun and the earth.
B)Earth is between the sun and the moon.
C)The sun is between the earth and the moon.
D)The moon is to the side of the earth and the sun.
Answer:
For 6 its D
For 7 its A
For 8 its C
For 9 I think its B but Im not sure
All engines operate at less than 100 percent efficiency because they
A. absorb heat
B. conduct heat
C. burn gasoline
D. emit heat
Answer:
It is B or D, but I may be leaning a little more towards D.
Explanation:
For a reaction to occur what must happen to the energy in order to break the chemical bond
Calculate the wavelength of an electron mass 9.1*10^-31kg moving with a velocity of 2.0*10^6m/s (h=6.63*10^-34Js) (Hint: De Broglie's wavelength)
Answer:
Wavelength, [tex]\lambda=3.64\times 10^{-10}\ m[/tex]
Explanation:
We have,
Velocity an electron is [tex]2\times 10^6\ m/s[/tex]
Mass of an electron is [tex]9.1\times 10^{-31}\ kg[/tex]
It is required to find the wavelength of electron. The De-Broglie wavelength of an electron is given by :
[tex]\lambda=\dfrac{h}{mv}[/tex]
h is Planck's constant
[tex]\lambda=\dfrac{6.63\times 10^{-34}}{9.1\times 10^{-31}\times 2\times 10^6}\\\\\lambda=3.64\times 10^{-10}\ m[/tex]
So, the wavelength of an electron is [tex]3.64\times 10^{-10}\ m[/tex].
What are two ways to increase impulse?
Answer:
increase the time the force acts or you could increase the number of temptations.
hope this helped!
Which statement best explains acceleration?
O A.
It is the total distance covered over a period of time.
B.
It is a change in velocity over a period of time.
Oc.
It is a change in displacement over a period of time.
OD.
It is a change in direction over a period of time.
Answer:
It is a change in velocity over a period of time.
Explanation:
It is measured in metres/second2 using an accelerometer.Two students walk out on the broken bridge together. As they reach the end of the bridge, what would happen to their gravitational potential energy.
A)Decrease
B)increase
C)Remain the same
D)None of the above
Answer: C
Explanation: I dont realy know what this means. but it will not increase because your not getting closer to earths center of gravity and not decreasing because your not high enough in the atmosphere.
Giotto used foreshortening in order to:
O A. enhance the importance of his subjects.
O B. make his figures look more realistic.
O C. combine linear and aerial perspectives.
O D. guide the eye of the viewer.
SUBMIT
Answer:
I think B is the answer.
HELP PLEASE GIVING 30 POINTS AND BRAINLIEST DUE VERY SOON!!
Answer:
3 is your anwser
Explanation:
what is the equivalet tempreture of 0 kelvin in celcius scale
HELP NEED IT IN 5 MIN
Answer:
-273.15 degree celcius
Explanation:
Mercury has a mass of 3.3 e 23 kg and a radius of 2.44 e 6 m. Find Mercury's
gravitational field strength. Show your work (formula, rearrangement, work, answer,
unit, sig dig) (4)
12. Venus has a mass of 4.87 e 24 kg and a radius of 6.05 e 6 m. The gravitational field strength at the surface of Venus is what? m/s2
13. A small Styrofoam ball has a 2.26 nC charge (2.26 x 10°C). Find the electric field strength
5.00 cm (0.0500 m) from the ball. Show your work complete with formula, work, unit and
sig digs) (4)
Answer:
11.) g = 3.695 m/s^2
12.) g = 8.879 m/s^2
13.) E = 8127 N/C
Explanation:
11.) Given that the
Mercury mass M = 3.3 × 10^23kg
Radius r = 2.44 ×10^6 m
Gravitational constant G = 6.67408 × 10^-11 m3kg-1 s^-2
Gravitational field strength g can be calculated by using the formula below
g = GM/r^2
Substitutes all the parameters into the formula
g = (6.67408 × 10^-11 × 3.3 × 10^23)/(2.44×10^6)^2
g = 2.2×10^13/5.954×10^12
g = 3.695 m/s^2
12.) Given that the
Venus mass M = 4.87×10^24kg
Radius r = 6.05 × 10^6 m
Using the same formula for gravitational field strength g
g = GM/R2
Substitute all the parameters into the formula
g = (6.67408 × 10^-11 × 4.87×10^24)/(6.05×10^6)^2
g = 3.25×10^14/3.66×10^13
g = 8.879 m/s^2
13.) Given that the
Charge = 2.26 nC = 2.26×10^-9
Distance d = 0.05m
Electric field strength E can be calculated by using the formula below
E = Kq/d^2
Where
K = electrostatic constant 8.99 × 10^9 Nm2/C2
Substitutes all the parameters into the formula
E = (8.99 × 10^9 × 2.26×10^-9)/0.05^2
E = 20.3174/2.5×10^-3
E = 8126.96 N/C
On which of the following objects, all sitting on the ground together, does
Earth exert a greater gravitational pull than a pencil? Check all that apply.
A. A basketball
B. A toothpick
C. A truck
D. A piece of paper
E. Your hand
Explanation:
a toothpick
1. A force that pushes forward on an object speeds the object up. A force that pushes backwards slows
the object down. What effect does a force that is perpendicular to the object's motion do?
Answer:
If pushing forward speeds it and pushing backward slows it down then force perpendicular to the object will keep it stationary and resist it's motion
Explanation:
Hope my efforts make impact in your life
The law of conservation of energy states that
A. energy cannot be converted from one from to another
B. energy cannot be created or destroyed
C. energy resources must be used efficiently
D. energy is constantly being lost to friction
Answer:
B
Explanation:
Energy can not be destroyed only converted into another form of energy
which type of circuit is shown?
A. closed series circuit
B. closed parallel circuit
C. open parallel circuit
D. open series circuit
Answer:
I think it's D. open series circuit .
Explanation:
hope it helps you!
a car travels 60 km in 2 hours 84 km the next 1 hour and then 68 km in 8.9 hours before reaching its destination what was the cars average speed in km / h
Answer:
17.8 km/hr
Explanation:
Average speed = distance / time
The total distance traveled is 60 km + 84 km + 68 km = 212 km.
The total time is 2 hr + 1 hr + 8.9 hr = 11.9 hr.
The average speed is 212 km / 11.9 hr = 17.8 km/hr
Electric circuit questions,,, plz help me