Answer:
If the average kinetic energy is greater than the attractive forces between the particles, a substance will not condense to form a liquid or a solid. If the kinetic energy is less than the attractive forces, a liquid or solid will form.
Explanation:
Calculate the acceleration of gravity that the moon has, if an astronaut has a mass of 87 kg and the weight force he experiences on the moon is 141 N
Answer:
the acceleration of gravity is 1.62
Explanation:
w=mg
141=87g
141/87=87g/87
1.62=g
You kick a soccer ball across a field the ball travels across the field and slowly comes to a stop. Since the ball slowly comes to a stop what does that mean about the acceleration of the ball?
Answer:
the acceleration is negative which means it is going in the opposite direction of the actual motion which concludes the reason why the ball is slowing down. However, when the ball is stopped, there is no acceleration as the ball is in equilibrium
Explanation:
Leena is a 16-year-old girl. She complains of tiredness and loss of appetite. She is unable to concentrate on her studies and appears pale and unhealthy. Her mother took her to the doctor. The doctor told her that it was because of her poor diet. What condition is she likely to have?
Answer: Her condition most likely is fatigue.
Explanation:
If an object is in free fall, on the way down it will
Answer:
It will find a worm when it hits the ground and starts Johnny sins fvcl<ing the worm
What is the mass of 2.5 mol of Ca, which has a molar mass of 40 g/mol?
Answer:100 g of ca
Explanation:
A skateboarder rolls horizontally off the top of a staircase and lands at the bottom. The staircase has a horizontal length of 12.0 with a vertical drop of 2.00. We can ignore air resistance.
Answer: 18.8 m/s
Explanation:
A skateboarder rolls horizontally off the top of a staircase and lands at the bottom. The staircase has a horizontal length of 12.0 m with a vertical drop of 2.00 m. We can ignore air resistance.
What is the skater's initial horizontal velocity?
Answer: 18.8 m
fr.shah visits patients at their homes. the equation y=150x + 50 represents the amount she charges, where y represents the total cost and x represents the number of hours she spends at the home. when the equation is graphed, what does the y-intercept represent?
Answer:
50 represent the initial fee or cost added to the total cost
Explanation:
y=150x + 50
y represents the total cost and
x represents the number of hours she spends at the home.
Just like the slope intercept form y=mx + b; where m is the slope of the rate of 150 per hour and y is the total cost.
50 represent the initial fee or cost added to the total cost; in order words, 50 is the b value or where the cost is at 0 hours.
Y is what she charges just to make the trip and show up.
The patient owes her that 50 as soon as she rings the doorbell, before she spends any time there.
1. A motorcycle stunt driver rides his motorcycle off a small ledge
that is 8.4 meters high. His initial velocity as he rides off the cliff is
24 m/s in the horizontal direction.
a. How long does it take before he lands on the ground below?
b. How far away from the base of the cliff does he travel while in
the air?
Answer:
Explanation:
Given
Height S = 8.4m
Initial velocity u = 24m/s
Required
Time it will take to reach the ground
Using the equation of motion
S = ut +1/2gt²
8.4 = 24t + 1/2(9.8)t²
8.4 = 24t+4.9t²
4.9t²+24t - 8.4 = 0
Multiply through by 10
49t²+240t-84 = 0
Factorize
t = -240±√240²-4(49(-84)/2(49)
t = -240±√57600+16464/98
t = -240±√74064/98
t = -240±272.15/98
t = 32.15/98
t = 0.328seconds
Hence it takes 0.328seconds before it lands on the ground below.
b) The horizontal distance is the range expressed as;
R = u²/g
R = 27²/9.8
R = 729/9.8.
R = 74.39m
a. The time it took before the motorcycle stunt driver lands on the ground below is 1.31 seconds.
b. The distance from the base of the cliff that the motorcycle stunt driver traveled while in the air is 31.44 meters.
Given the following data:
Maximum height = 8.4 meters.Initial velocity = 24 m/s.We know that the acceleration due to gravity (g) of an object on planet Earth is equal to 9.8 [tex]m/s^2[/tex]
a. To determine how long (time) it took before the motorcycle stunt driver lands on the ground below:
At maximum height, time is given by the formula:
[tex]Time = \sqrt{\frac{2H}{g} }[/tex]
Where:
g is the acceleration due to gravity.H is the maximum height.Substituting the given parameters into the formula, we have;
[tex]Time = \sqrt{\frac{2\times 8.4}{9.8} }\\\\Time = \sqrt{\frac{16.8}{9.8} }\\\\Time =\sqrt{1.7413}[/tex]
Time = 1.31 seconds.
b. To determine how far (distance) away from the base of the cliff the motorcycle stunt driver traveled while in the air:
[tex]Horizontal\;distance = horizontal\;speed \times time\\\\Horizontal\;distance = 24 \times 1.31[/tex]
Horizontal distance = 31.44 meters.
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The amount of kinetic energy in a moving object depends on its mass and what
Answer:
Kinetic energy depends on mass and speed (or magnitude of velocity).
K.E. = 1/2 M S² or The amount of kinetic energy of a moving object has dependence on its mass and its velocity.
Explanation: They are both right for a certain question
The kinetic energy of a moving object depends on its mass and velocity. The higher the velocity higher will be the kinetic energy. Mass also have the similar effect.
What is kinetic energy?Kinetic energy of an object is the energy generated by virtue of its motion. When particles of an object acquire much energy to overcome the intermolecular force, they gain kinetic energy to move apart.
Kinetic energy is related to the mass and velocity of the moving object. The expression relating kinetic energy with these parameters is written below:
Ke = 1/2 mv².
As per the relation, the kinetic energy of an object increases with an increase in mass or velocity or both. Hence, massive objects with greater velocity is having greater kinetic energy.
Find more on kinetic energy:
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what is the direction of the sum of these two vectors?
Answer:
what is the direction of the sum of these two vectors?
Answer:
69.6
Explanation:
Ax= 0
Ay= 63.5
Bx= 101 cos 57= 55.009
By= 101 sin 57= 84.706
Tan-1 = (84.706/55.009)
= 69.6
Please answer this question...
1 Less and 2 greater!
Alex wants to take a small road trip over the weekend, but
needs to be back before Monday. He travels 450 miles and
it takes him 9 hours. What unit of measurement should
Alex be measuring his speed with
Answer:
Miles is the distance unit. Hours is the time unit.
Explanation:
A 0.50-kg red cart is moving rightward with a speed of 50 cm/s when it collides with a 0.50-kg blue cart that is initially at rest. After the collision, the blue cart begins moving rightward with a speed of 40 cm/s. The red cart is still moving rightward but has slowed down to a speed of 10 cm/s. Enter the momentum values (in kg•cm/s) of each individual cart and of the system of two carts before and after the collision. Also indicate the change in momentum of each cart.
Explanation:
Step one:
given data
mass of red cart m1=0.5kg
initial velocity u1 of red cart=50cm/s
mass of blue cart m2=0.5kg
initial velocity u2 of blue cart= 0cm/s
final velocity v2 of blue cart= 40cm/s
final velocity v1 of red cart= 10cm/s
Step two:
Momentum values red cart before and after the collision.
Before collision
P1=m1u1
P1=0.5*50
P1=25kg•cm/s
After collision
P2=m1v1
P2=0.5*10
P2=5kg•cm/s
Change in momentum= P1-P2=25-5= 20kg•cm/s
Momentum values blue cart before and after the collision.
Before collision
P1=m1u1
P1=0.5*0
P1=0 kg•cm/s
After collision
P2=m1v1
P2=0.5*40
P2=20kg•cm/s
Change in momentum= P1-P2=0-20= -20kg•cm/s
The total momentum of the system of the carts before collision is 25 kgcm/s.
The total momentum of the system of the carts after collision is 25 kgcm/s.
The change in momentum of the red cart is -20 kgcm/s.
The change in momentum of the blue cart is 20 kgcm/s.
The given parameters;
mass of the red cart, m₁ = 0.5 kginitial speed of the red cart, u₁ = 50 cm/smass of the blue cart, m₂ = 0.5 kginitial velocity of the blue cart, u₂ = 0final velocity of the blue cart, v₂ = 40 cm/sfinal velocity of the red cart, v₁ = 10 cm/sThe momentum of the red cart before collision is calculated as follows;
[tex]P_r_1 = m_1u_1\\\\P_r_1 = 0.5 \times 50\\\\P_r_1 = 25 \ kgcm/s[/tex]
The momentum of the blue cart before collision is calculates as follows;
[tex]P_b_1 = m_2 u_2\\\\P_b_1 = 0.5 \times 0\\\\P_b_1 = 0 \ kgcm/s[/tex]
The momentum of the red cart after collision is calculated as follows;
[tex]P_r_2 = 0.5 \times 10\\\\Pr_2 = 5 \ kgcm/s[/tex]
The momentum of the blue cart after collision is calculated as follows;
[tex]P_2b_2 = 0.5 \times 40\\\\P_2b_2 = 20 \ kgcm/s[/tex]
The total momentum of the system before and after collision is calculated as follows;
[tex]P_1 = 25 \ kgcm/s \ + \ 0 = 25 \ kgcm/s\\\\P_2 = 5 \ kgcm/s \ + \ 20 \ kgcm/s = \ 25 \ kgcm/s[/tex]
The change in momentum of the red cart is calculated as follows;
[tex]\Delta P_r = Pr_2 - Pr_1\\\\\Delta P_r = 5 - 25 = - 20 \ kgcm/s[/tex]
The change in momentum of the blue cart is calculated as follows;
[tex]\Delta P_b = P_b_ 2 - P_b_1\\\\\Delta P_b = 20 - 0 \ = \ 20 \ kgcm/s[/tex]
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A roller coaster with a potential energy of 235,200 J sits at the top of a 30 m high hill. What is the mass of the roller
coaster? (Formula: PE = mgh)
O 800 kg
O 7,840 kg
O 8,000 kg
O 78,400 kg
Answer:
800 kg
Explanation:
I just did it :)
Explain what the wedge does with the downward force of the axe. Why is this useful to someone cutting wood?
Answer:
The wedge balances propelled force.
Explanation:
According to the laws of motion, when appropriate weight is employed properly, a ball can move a truck. The same basic functions apply in this scenario. You often find a woodcutter raising the axe and letting it fall into the wood. This allows force to equally generate at both sides of the axe, splitting the wood apart.
A plane flies at 400 north of East for 150 miles,then flies 200 miles at an angle of 150 west of North. What is the plane's final displacement? Show all work
Answer:
341.46miles
Explanation:
Find the diagram attachment.
To get the displacement D, we will use the cosine rule as shown;
D² = 200²+150²-2(160)(400)cos65°
D² = 40000+22500-128000cos65°
D² = 62500+54095.14
D² = 116595.14
D = √116595.14
D= 341.46 miles
Hence the plane final displacement is 341.46miles
How much force must a 40,000 W engine exert to get a car up to 75 m/s?
Edit: Answer - 533N
Answer:
Force = 533.33N
Explanation:
Given the following data;
Power = 40000watt
Velocity = 75m/s
To find the force;
[tex] Power = force * velocity [/tex]
Making force the subject of formula, we have;
[tex] Force = \frac {Power}{velocity}[/tex]
[tex] Force = \frac {40000}{75} [/tex]
Force = 533.33N
Which of the following objects had the greatest force applied to it? *
A) An object with a mass of 10 kg and an acceleration of 2.5 m/s^2
B) An object with a mass of 12 kg and an acceleration of 3.0 m/s^2
C) An object with a mass of 20 kg and an acceleration of 1.5 m/s^2
D) An object with a mass of 15 kg and an acceleration of 1.0 m/s^2
Answer:
B) is the answer
Explanation:
A) is 25 N
B) is 36N
C) is 30N
D)15N
prove that:the unit of pressure is a derived units
wheres my lil mama?
Answer:
Explanation:
I FOUND YOUUU
Answer:
300,000
Explanation:
right here dad_0 ;) u got snap?
A space shuttle travels around the Earth at a constant speed of 28000 kilometers per hour. If it takes 90 minutes to complete one orbit, how far is its journey around Earth?
I need the answer ASAP!
What is a transverse wave like?
Answer:
a transverse wave is a moving wave whose oscillations are perpendicular to the direction of the wave or path of propagation
Explanation:
wave oscillate along paths at right angles to the direction of the wave’s advance.
Explanation:
HELP PLEASEEEE How might the concept of momentum be applied to seafloor spreading?
Answer:
the momentum of the earthExplanation:
Answer:
please mark me as brainlest
11/28/20 2:14 pm name tom
hello i hope this is what you needed
What does seafloor spreading result in?
Explanation:
Seafloor spreading occurs at divergent plate boundaries. As tectonic plates slowly move away from each other, heat from the mantle's convection currents makes the crust more plastic and less dense. The less-dense material rises, often forming a mountain or elevated area of the seafloor. Eventually, the crust cracks.
What group is Ne in? What is its period?
Answer:
Neon (Ne), chemical element, inert gas of Group 18 (noble gases) of the periodic table, used in electric signs and fluorescent lamps. Colourless, odourless, tasteless, and lighter than air, neon gas occurs in minute quantities in Earth's atmosphere and trapped within the rocks of Earth's crust.
Explanation:
I am smart
Answer:
It is a Noble gas and its group is 18 or 8a and its period is 2.
Explanation:
the reason behind my answer is group is the column and the period is the row.
If the box the man is carrying is very heavy, explain if he does any work as he walks across the room with it.
3. A student fills a plastic bottle full of water. He make a hole in the bottle half-way up,
and another hole at the bottom.
(a) Does the water come faster out of the hole in the middle or the hole at the bottom?
Explain your answer.
Answer:
It would go out the bottom hole faster.
Explanation:
It goes down the bottom hole faster because the water would get poured out the bottom before they even flipped the water bottle.
work done per unit time :- a. force b. power c. energy d. momentum
find the mass of a car that is travelling at a velocity of 60m/a north. The car had 5,040,000 j of kinetic energy
Answer:
2800kg
Explanation:
Your car gets a flat! You go from 90 kilometers per hour to a stop in 6 seconds. What is your rate of deceleration? (it's negative!)
I need this ASAP!
Answer:
-15?
Explanation:
a change in the thermal energy of an object is related to the objects specific heat, heat temperature change, and mass. true or false
this is science BTW
true
think of a hurricane , for it to move it needs energy from the water (warm water).and one it gets on land which has less specific heat in it the hurricane ends
Answer:
True
Explanation:
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