Explanation:
An object that is partly or completely submerged experiences a greater pressure on its bottom surface than on its top.
Answer:
upthrust force is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object
Acceleration occurs when an object is subjected to a(n):
a- force
b- balanced force
c- unbalanced force
d- contact force
Answer:
I'm not sure but it may be d.
Answer:
C
Explanation:
It can only move if unbalanced
Thermal conductivity of a material is given as 129Btuft–¹ h–¹°F–¹.Calculate this thermal conductivity in Jm–¹s–¹°C–¹(Given: 1Btu=1055J;0.3048m=1ft; and 1 °F= (5/9)°C)
Answer:
223.25 [tex]$\text{Jm}^{-1}\text{s}^{-1}^\circ\text{C}^{-1}$[/tex]
Explanation:
The thermal conductivity of an object is defined as the measure or the ability of the object to transfer heat or conduct heat through its body.
In the context, the thermal conductivity of the material is given as
[tex]$=129 \text{ Btu ft}^{-1}\text{h}^{-1}^\circ\text{F}^{-1}$[/tex]
And it is given that :
1 Btu = 1055 J
1 ft = 0.3048 m
[tex]$1^\circ F = \frac{5}{9}^\circ C$[/tex]
We know that 1 h = 3600 s
So the thermal conductivity of the material in [tex]$\text{Jm}^{-1}\text{s}^{-1}^\circ\text{C}^{-1}$[/tex] is :
Thermal conductivity :
[tex]$=\frac{129 \text{ Btu}}{1 \text{ ft }\times \text{1 h}\times 1^\circ\text{F}}$[/tex]
[tex]$=\frac{129 \times 1055 \text{ J}}{0.3048 \text{ m} \ \times 3600 \text{ s}\ \times \frac{5}{9}^\circ \text{C}}$[/tex]
= 223.25 [tex]$\text{Jm}^{-1}\text{s}^{-1}^\circ\text{C}^{-1}$[/tex]
The diver finds a rectangular aluminum plate having dimensions 1.0m x 2.0m x 0.03m. A hoisting cable is lowered from the ship and the diver connects it to the plate. The density of aluminum is 2.7 x 103kg/m3. Ignore the effects of viscosity. (c) Calculate the tension in the cable if it lifts the plate upward at a slow, constant velocity. (d) Will the tension in the hoisting cable increase, decrease, or remain the same if the plate accelerates upward at 0.05 m/s2
Answer:
(c)Tension = 162 N
(d) Increase
Explanation:
(c)
In order for the cable to lift the plate at uniform velocity, the tension in the cable must be equal to the weight of the plate.
[tex]Tension = Weight = (Density)(Volume)\\Tension = (2.7\ x 10^3\ kg/m^3)(1\ m)(2\ m)(0.03\ m)\\[/tex]
Tension = 162 N
(d)
The tension with upward acceleration will become:
[tex]Tension = m(g+a)\\Tension = mg + ma\\Tension = Weight + ma\\[/tex]
Hence, the tension will increase by an amount equal to "ma".
Does the polarity of the rocks in the Aragorn Sea suggest that it is currently expanding? Explain. Thanks This is the last question
The answer is no. Hope this helps
The gravitational force between two objects will be greatest in which of the following situations?
Both objects have small masses are close together.
One object has a large mass, and the objects are close together.
Both objects have large masses and are close together.
Both object have large masses, and they are far apart.
Answer:
One object has a large mass, and the objects are close together.
Step 3: Create your graphs. a) Decide how many graphs you will need to show the energy transformation. b) You should have at least 3 graphs, so that the steps of the transformation will be clear. c) Each graph should be clearly labeled. d) Careful use of color on your graphs will make them easy to read and understand. It's for Edge. Project: Energy Transformation Poster. Thank you!
A van de Graaff generator accelerates electrons so that they have energies equivalent to that attained by falling through a potential difference if 150mV
Answer:
Hello your question is incomplete hence I will give you a general answer on how A van de Graaff generator works
answer :
If the electrons falls through a PD of 150mV the electron will gain energy of 150MeV
Explanation:
when a Van de Graff generator is used to accelerate an electron through a PD ( potential difference ) of any value the particle ( electron ) the electron will gain energy ( eV ) which is is equivalent in value of the PD it accelerated through
hence if the electrons falls through a PD of 150mV the electron will gain energy of 150MeV
How would radiation occur in space?
Answer:
Space radiation is made up of three kinds of radiation: particles trapped in the Earth's magnetic field; particles shot into space during solar flares (solar particle events); and galactic cosmic rays, which are high-energy protons and heavy ions from outside our solar system.
Explanation:
I need help. Is this right? ITS SO
Answer:
Yes, that is correct.
solid state has ____________ intermolecular force of attraction.
solid state has the most intermolecular force of attraction.
SIL. TUILE I JUMU
Write down your own examples for each of the different effects of forces.
Answer:
magnetic force
Explanation:
when some one gets charged up by maybe static eletricity the person will sustain the energy and the energy will make a force field around the person which can and will attract paper and he will be attractive
Explanation:
Examples for effect of force - example
1) Can change the state of an object(rest to motion/ motion to rest):For example, pushing a heavy stone in order to move it. 2) May change the speed of an object if it is already moving. ... 3) May change the direction of motion of an object
Car #1 has a mass of 1000 kg and moves with a velocity of 10 m/s north.
Car #2 has a mass of 500 kg and moves with a velocity of 10 m/s north.
Compare and contrast Car #1 and Car #2.
A.
Car #1 has 2-times the momentum as Car #2
В.
Car #1 has 4-times the momentum as Car #2
Car #2 has 2-times the momentum as Car #1
D.
Car #2 has 4-times the momentum as Car #1
Answer:
A. Car #1 has 2-times the momentum as Car #2
Explanation:
Momentum is defined as the product of mass and velocity:
[tex]P = mv[/tex]
where,
P = Momentum
m = mass
v = velocity
FOR CAR # 1:
m = 1000 kg
v = 10 m/s
Threfore,
[tex]P_1 = (1000\ kg)(10\ m/s)\\P_1 = 10000\ N.s[/tex]
FOR CAR # 2:
m = 500 kg
v = 10 m/s
Threfore,
[tex]P_2 = (500\ kg)(10\ m/s)\\P_2 = 5000\ N.s[/tex]
Dividing both momentums:
[tex]\frac{P_1}{P_2} = \frac{10000\ N.s}{5000\ N.s}\\\\P_1 = 2P_2[/tex]
Therefore, the correct option is:
A. Car #1 has 2-times the momentum as Car #2
help me
please
lol
?????
Answer:
150 N= 15 or 150 N= 1.1
Explanation:
What I did was subtract 165kg and 150 N and I divided it too but I got 1.1 so yuhh
A car driver spends 3 h driving at an average speed of 80 km/h, stops for 30min to have some rest, and then drives at an average speed of 90 km/h for 2 hours. Calculate the average speed during the whole journey.
Answer:
76.36km
Explanation:
Average speed=Total distance covered ÷ Total
time taken
Distance=Time * speed
3*80=240km
2*90=180km
Total distance covered =240+180=420km
Total time taken=3+1/2 an hour+2=5 1/2 hours
Average speed =420km ÷5 1/2 hours
=76.36km/h
Most metallic elements, such as copper
and iron, have high melting points. This
is a useful property because
F. it keeps cars made of metal from
becoming hot on summer days
G. it enables people to use pots and pans
made of metal to cook food
H. it prevents machine parts made of
metal from rusting
J. it makes metals easier to melt so they
can be poured into molds to make
precision tools
Answer:
G. it enables people to use pots and pans made of metal to cook food
Explanation:
Metals are known to be substances with a relative high melting point, which means that it takes a very high temperature to melt them. As used in this question, copper (Cu) and iron (Fe) at metallic elements that have high melting points.
One advantage of this property based on the options provided is that "it enables people to use pots and pans made of metal to cook food". This is because cooking food requires subjecting them to a constant temperature from a heat source e.g cooker or stove.
The material used to hold the food being cooked must possess a very high melting point to withstand the heat, hence, the importance of these metallic substances. Most pots and pans are made of steel, an alloy of iron, hence, they have high melting point.
Which of the following is a learned behavior of a cat
A. Meowing
B. Drinking water
C. Purring when happy
D. Using a litter box
4. Someone took the last cookie in the cookie jar last night. The LAST
person to leave this scene is the culprit. Who was it? (see below)
O
A. The cook with the motor cycle
B. The maid with the car
O
C. The handyman with the bike
D. The nephew and the dog
What’s the answer
Answer:
I think B is the answer
Explanation:
I think this cause a maid always cleans the house and might be awake at night
How do volcanos effect ecosystems? in ur own words please!!
Answer:
well i guess i can try...
Explanation:
Volcanoes are a dangerous natural occurance that can greatly effect any ecosystems. There are various effects of volcanoes such as, lava flows, volcanic landslides, mud-flows, and ash flows, which generally result in total obliteration of any ecosystem in their path, they can also have long term beneficial effects to the environment. One of these long term effects are, the creation of some of the most nutrisous, and fertile soil on earth, causing healthy plants to grow.
.
1. True False
In AM waves, amplitude changes.
A line graph is constructed to display the data from Data Table 2. Add a correct title and labels for the axes
Answer:
mass kg velocity m/s kinetic energy j
please help lol- brainlist to whomever- P.S---> Do it all please, and don't get any wrong. Then you get brainiist.
Glass: inorganic
Water: inorganic
Sugar: organic
Salt: depends what type of salt it is but most likely inorganic
Olive Oil: organic
how does lightning occur
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Answer:
Lightning is an electrical discharge caused by imbalances between storm clouds and the ground, or within the clouds themselves. Most lightning occurs within the clouds. ... This heat causes surrounding air to rapidly expand and vibrate, which creates the pealing thunder we hear a short time after seeing a lightning flash.
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Brainliest?
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Answer:
Lightning can be explained in terms of charges produced due to rubbing. During a thunderstorm, the air currents move upwards and the water droplets move downwards. And this caused due to the separation of charge due to this vigorous motion.
Explanation:
"On a good day, it takes Mr. Hess 23 minutes (1380 seconds) to drive the 12 miles (19,300 meters). What is his average velocity on the way to school?"
I uh, don't understand this at all. If someone could help me solve this, I'd greatly appreciate it!
Answer:
his average velocity is
[tex]v = \frac{19300}{1380} = 13.9855(m \div s)[/tex]
How do the gravitational potential energy and the kinetic energy of the ball change as the ball rolls down the ramp?
Explanation:
The gravitational potential energy is given by :
P = mgh
The kinetic energy of an object is given by :
[tex]K=\dfrac{1}{2}mv^2[/tex]
As the ball reaches the bottom of the ramp, its potential energy decreases and kinetic energy increases.
It imply that, when the ball at the top most height, its gravitational potential energy is maximum and zero kinetic energy and when ball reaches the bottom of the ramp, it will have maximum kinetic energy and zero potential energy.
Which of the following provides alternating current? Select all that apply.
- Microphone
- Power outlet in your house
- Solar cells
- Battery
Use the drop-down menus to answer each question.
Which type of storm is associated with microbursts?
Which type of storm is common in areas of drought and can last for days?
Which type of storm happens just before strong weather fronts?
Which type of storm moves quickly, appears with little warning, and lasts only a few minutes?
Answer:
1. haboob
2. dust storm
3. haboob
4. sandstorm
Explanation:
just did the assignment
describe what happens when light strikes a translucent material, transparent material , opaque material . give one specific example of an object that has each type of surface.
Answer: according to https://www.doe.virginia.gov When light strikes translucent materials, only some of the light passes through them. The light does not pass directly through the materials. ... Opaque objects block light from traveling through them. Most of the light is either reflected by the object or absorbed and converted to thermal energy.
Explanation:
A 2 kg ball of clay moving at 35 m/s strikes a 10 kg box initially at rest. What is the velocity of the box after the collision?
Answer:
V = 5.83 m/s
Explanation:
Given that,
Mass of a ball of a clay, m = 2 kg
Initial speed of the clay, u = 35 m/s
Mass of a box, m' = 10 kg
Initially, the box was at rest, u' = 0
We need to find the velocity of the box after the collision. Let V be the common speed. Using the conservation of momentum to find it.
[tex]mu+m'u'=(m+m')V\\\\V=\dfrac{mu+m'u'}{(m+m')}\\\\V=\dfrac{2\times 35+10\times 0}{2+10}\\\\V=5.83\ m/s[/tex]
So, the velocity of the box after the collision is equal to 5.83 m/s.
Part G Assume that friction causes the car to lose 37,800 joules of energy as it travels from the top of the first hill to the bottom.
What's the car's velocity at the bottom of the first hill? Use your answer from part C (416,500) and the formula v= to determine the answer.
(This formula is the kinetic energy formula, rearranged to find v.) 2KE
Answer:
29.9 m/s
Explanation:
answer on edumentum
Answer:
Because energy is conserved, the kinetic energy at the bottom of the first hill is the potential energy at the top of the hill, minus energy lost from friction:
KE = 416,500 J – 37,800 J = 378,700 J
To find the velocity of the car, plug the values for KE and m into the formula and solve:
The roller coaster car has a velocity of about 29.9 meters/second at the bottom of the first hill.
Explanation:
edmentum
If a rocket is launched with a velocity of 8,000 m/s, how high does it rise?
If a rocket of mass 117 kg is launched with a velocity of 800 m/s, so, the height is 32000m.
What is Kinetic energy?Kinetic energy is defined as the energy possessed by an object due to its motion that can be transferred between objects and converted into other forms of energy. It can be expressed as:
[tex]K.E.= 1/2 mv^2[/tex]
For above given information,
m is the mass which is 117kg
v is the velocity which is 8000m/s
So,
K.E.= [tex]1/2 (117)* (8000)^2[/tex]= [tex]3.744*10^7[/tex] Joules
So, we assume kinetic energy is equal to gravitational potential energy
G.P.E.= mgh
where, g is the gravitational strength which is 10N/kg for Earth
So,
[tex]3.744*10^7= (117).(10). h\\h= 3.744*10^7/1170\\h= 32000m[/tex]
So, the rocket of mass 117 kg is launched with a velocity of 800 m/s, so, the height is 32000m.
Learn more about Kinetic energy, here:
https://brainly.com/question/26472013
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Your question is incomplete, most probably the complete question is :
If a rocket of mass 117 kg is launched with a velocity of 800 m/s, how high does it rise?
