Explanation:
Given that,
Mass of a skier, m = 55 kg
The vertical distance between start and finish is 10 m.
(a) The potential energy of a skier is given by :
[tex]E=mgh\\\\E=55\times 9.8\times 10\\\\=5390\ J[/tex]
(b) When she reaches the bottom of the hill, the potential energy is converted to kinetic energy. So,
[tex]5390=\dfrac{1}{2}mv^2\\\\v=\sqrt{\dfrac{2\times 5390}{55}} \\\\v=14\ m/s[/tex]
Hence, her potential energy is 5390 J and at the bottom of the hill she is moving with a speed of 14 m/s.
Which metric prefix has a decimal form of 0.01?
Answer:
Centi is the metric prefix for 0.01
What happens to the number of daylight hours as Earth moves in its orbit from winter to spring?
Answer:
The earth is exposed much more during the summer the hours of daylight is increased slightly
Explanation:
!!! HELP PLEASE !!!
A group of friends are going bowling. They discuss how ball weight and speed can change the amount of
kinetic energy transferred to the pins.
They can use a 6 pound, 10 pound or 12 pound ball.
They can roll the ball at 10 miles per hour (beginner), 14 miles per hour (intermediate) or 18 miles per hour (professional) speed.
A. Describe a strategy that they could use to transfer the greatest amount of kinetic energy to the pins.
B. Explain the relationship between kinetic energy and strategy that you chose in part A.
C. Draw a model that demonstrates the energy transfers that occurred in the system.
Answer:
A. you would want to use the 12 ound ball and the 18 mph speed in order to transfer the most kinetic energy
B. KE= 1/2 MV^2 so you would want to maximize both your Mass(weight of the ball) and Velocity(speed of the roll) in order to achive the greatest KE.
C. see image
Explanation:
Full disclosure not totally sure what you are being asked in the last one but I put togethere a rough sketch that is my best guess.
A plane flies along a straight line path after taking off, and it ends up 90.0 km farther east and 200.0 km farther north, relative to where it started. In what direction did it fly on the straight line path?
27° north of east
45 ° north of east
24° north of east
66° north of east
Answer:
24° north of east
Explanation:
tan(x)=90/200 ie x=arctan(90/200)=24°
So the plane took off 24° east.
Answer:
24° north of east
Explanation:
Hope this will help
What do all electromagnetic waves have in common?
• They can travel at the speed of light
o They has the same wavelengths.
O They travel only through matter
O They have nonmoving magnetic fields
Free fall acceleration
I need help?!!
Explanation:
if g is 10ms^-1
answers are
1-10
2-20
3-30
4-40
5-50ms^-1
Help me with this please everyone e
Answer:
false I wouldn't say its a consequence.
The chemical symbol for nitrogen is
A Na
B Ni
Ne
DN
The chemical symbol for nitrogen is N
[tex]▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪[/tex]
Chemical symbol for nitrogen is :
D.) " N "-CIVICS- Do you feel it is important to be civically engaged in your community? Why or why not?
Answer:
I feel it's important to be civilly engaged in my community because it gives me a sense of placement and home in my own community. It also allows me to feel that my voice is being heard and not ignored.
-List ten different waves that you encounter in everyday life. Be specific, don't just say "sound
waves," but say "the sound waves generated by my cat meowing."
-For each of the waves in your list, specify whether it is a "transverse" or "longitudinal" wave
(I just need random everyday examples)
Answer:
1.Radio waves from using your TV.
2. microwaves you are in satellites.
3.UV light waves come from sunlight
4.x ray waves used at the doctors office
5. infrared waves are in remote controls when sending signals.
I don't know if I can think of another 5 right now. but I hope this helps.
Give me some of the best anime movies !!!!
Answer:
yarchij b club, kakegurui, devilman, Mr.love, yuri on ice, sk8, joker game, young black jack
If the current is 10 amps and the voltage source is 200 volts,
what is the resistance?
Answer:
4,000
Explanation:
Answer:
2000
Explanation:
Energy balance worksheet
Please help with this question !!!!!
Answer:
te puedo ayudar pero corazón y estrella
y ando buscando novia por si quieres ser mia
HELP!!! I need to turn this in quickly :((
F = 6.0 x 10⁻⁸ N
Further explanationGiven
mass of 2 dump trucks = 1500 kg
distance = 50 m
Required
Gravitational force
Solution
Newton's Gravity Law:
[tex]\rm F=G.\dfrac{m_1.m_2}{r^2}[/tex]
with F = gravitational force,
G = gravitational constant,
m1, m2 = mass of object,
r = distance between two objects.
Input the value :
F = (6.67.10⁻¹¹N.m² / kg² x 1500²) : 50²
F = 6.0 x 10⁻⁸ N
what is the approximate increase in thermal energy in joules when the temperature of 15 grams of water is raised from 20° to 35° C. the specific heat of water is 4.19 j/g degrees Celsius
Answer:
942.75J
Explanation:
Change in thermal energy is equal to the mass of the given substance times the specific heat capacity times the temperature change.
We've already been given the specific heat capacity, the mass as well as the initial and final temperatures.
So change in temperature will be 35° - 20° = 15°
Thermal energy change = 15 × 15 × 4.19
The final answer is 942.75J
Hope that helped.
What is the mass of an object if it's gravitational potential energy is 3822 J and it is 15 m above the ground
Answer:
B. I DID IT AND GOT IT RIGHT
Explanation:
Answer:
It is B
Explanation:
i did this one
Example of kinetic to thermal? And explain how the energy is changing forms? Please help
Answer:
Indeed
Explanation:
Answer:
A roller coaster that is running heating up the rails
Explanation:
the enery is changing forms due to friction and cunduction
The energy the Sun gives off is caused by nuclear reactions in its core. The extreme pressure from the weight of the gases that make up the Sun raises the temperature of the core enough for the nuclear reactions to take place. Which law best describes this behavior of gases in the Sun?
Answer:
The law which describes the behavior of gases in the Sun is Gay-Lussac's Law
Explanation:
The states that the extremely high pressure of the gases in the Sun produces extremely high temperature;
Therefore, the relationship between the pressure, 'P', of the gas and the temperature, 'T', of the gas is a direct relationship, which can be expressed mathematically as follows;
P ∝ T
The law which best describes the behavior of gases in the Sun is Gay-Lussac's Law, which states that the pressure of a given volume of gas varies directly as the absolute temperature of the gas, as follows;
P = K·T
∴ P/T = K (Constant)
[tex]\therefore \dfrac{P_1}{T_1} = \dfrac{P_2}{T_2}[/tex]
!!! i'll give brainliest to whoever can answer this for me !!!
you have to match the letters in the picture to the list of energy types
Answer:
you have to match the letters in the picture to the list of energy types