Answer: I THINK the answer is A - Up.
Explanation: The buoyancy force always points upwards because of the pressure of a fluid increases. If the buoyant force is less than the object's weight, the object will sink. You can calculate the buoyant force on an object by adding up the forces exerted on all of an object's sides.
Which best describes the act of using senses or tools to gather information?
ОООО
creating a hypothesis
making an observation
summarizing the results
recording the measurements
Answer:
Making an observation
Explanation:
By observing, you can draw qualitative and quantitative data from the subject of observation
? Question
Type the correct answer in the box. Round your answer to the nearest whole number.
Calculate the mass of the ball using PE = m*g x h. (Hint: Rearrange the formula to solve for m.)
kilograms.
A ball held 2.0 meters above the floor has 59 joules of potential energy. The ball's mass is about
(Use g = 9.8 N/kg.)
Answer:
1,156.4 but to the nearest whole number it's 1,156
Explanation:
PE= m×g×h
59×9.8×2.0
= 1,156.4
nearest whole number -1,156
Can someone help me??
A car travels 1026 km in 6 hours. Find its average speed.
Answer:
171
Explanation:
To work out average speed, you have to do distance divide by time.
1026 divide by 6= 171
I hope that helped you.
List the 2 advantages and 2 disadvantages of wind as a source of electricity.
Answer:
The first 2 advantages of wind a source of electricity is that it provides you wifi and wind. 2 disadvantages of wind as a source of electricity is that to much wind could knock it down or slow down the source of the electricity.
Explanation:
I know this because i read a article on it.
Vector quantities include what 3 things?
Explanation:
I think ur answer is:
Examples of vector quantities include displacement, velocity, position, force, and torque.
Hope this helps..
Good Luck
True/False: Paraphrasing Einstein’s Theory of General Relativity, gravity "handprint" makes an "indentation" in the fabric of space and time. A. True B. False
Paraphrasing Einstein’s Theory of General Relativity, gravity "handprint" makes an "indentation" in the fabric of space and time. - this is False.
What is Einstein's Theory of General Relativity?According to Einstein's general theory of relativity, which was published in 1915, the space-time curvature is what causes what we experience as the force of gravity. According to the scientist, this geometry is altered by the sun and the Earth.
According to Ghez, who added that her research team is one of only two in the world to have observed a star known as S0-2 complete an orbit in three dimensions around the supermassive black hole at the centre of the Milky Way, the laws of physics, including gravity, should hold true everywhere in the universe.
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What is the inverse tangent of 0.9?
O A. 64.2
O B. 90.0
O C. 42.0
O D. 0.016°
Answer:
i think the aswers is C,
A country is deciding what to do about pollution given off by power plants.
Which of the following is an example of how science can be used to make this decision?
A. Scientists know what kind of power plants people want.
B. Scientists can measure how much pollution is given off.
C. Scientists are allowed to pass laws about pollution.
D. Scientists own most of the power plants in the United States.
Answer:
The correct option is B
B) Scientists can measure how much pollution is given off.
Explanation:
A) To determine what kind of plants do people want, a polling or a survey is carried out. It is not the job of a scientist to carry that out.
B) Scientist have derived various techniques to measure different kinds of pollution. For example, air pollution can be derived from the Air Quality Index, which measure the quality of the air. The higher the value of Air Quality Index, more is the pollution.
C) Scientists are not allowed to pass any laws regarding pollution. Any kind of laws, including those related to pollution are passed by the Congress.
D) Most of the powerplants in US are owned by private business, while some are under control of the government.
Answer:
Scientists can measure how much pollution is given off.
Explanation:
How do scientists use hotspot volcanism to tell the direction and speed
of a plate?
A region of the Upper crust where hot plumes can emerge and erupt as volcanoes on the crust above is referred to as the hotspot volcanism.
What is hotspot volcanism?Hotspots are areas of volcanic activity that are assumed to be fueled by an earth's mantle that is abnormally hot compared to the surrounding mantle. Hawaii, Iceland, and Yellowstone are a few examples. Hotspots may form a chain of volcanoes when the plates move above them because their position just on Earth's surface is autonomous of tectonic plate boundaries.
Geologists will need some hotspot chains to determine the direction and pace at which a plate is moving because many hotspots in the mantle are immobile. The majority of hot spots are located far from continental plates, yet they nonetheless provide a tool to gauge plate mobility. This is due to the fact that a hot point typically doesn't move, unlike the plate boundary above it. The heat from the plume causes some of the rock inside the plate boundary above a hot point to partially melt.
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A student is pushing a box across the room. To push the box three times farther, the student needs to do how much work?
Answer:
Removing some of the books reduced the mass of the box, and less force was needed to push it across the floor.
How do Newton's laws of motion explain why it is important to keep the ice smooth on a hockey rink so that players can
pass a puck as quickly as possible?
OSmooth ice reduces the inertia of the hockey puck.
Smooth ice increases the force used to accelerate the hockey puck.
Smooth ice reduces the unbalanced forces that would slow the hockey puck.
Smooth ice decreases the reaction force that the ice exerts on the hockey puck.
Save and Fxit
Answer:
c
Explanation:
edge 2021
Which statement correctly describes the differences between positive and negative acceleration?
Positive acceleration describes a change in speed; negative acceleration describes no change in speed.
Positive acceleration describes no change in speed; negative acceleration describes a change in speed.
Positive acceleration describes an increase in speed; negative acceleration describes a decrease in speed.
Positive acceleration describes a decrease in speed; negative acceleration describes an increase in speed.
Answer:
C
Explanation:
Positive acceleration describes an increase in speed ; negative acceleration describes a decrease in speed.
A semitruck (m. 20,000 kg) is 10 m from a car (m 2000 kg) What is the force of gravity between them? (0.667 10-11 N•m²/kg)
A. 2.67 104N
B. 1.22 104N
c. 1.22 105N
D. 267 . 10-5N
Answer: D
Explanation:
Given information:
Semi truck mass M = 20000kg
Car mass m = 2000 kg
Distance d = 10 m
G = (0.667 10-11 N•m²/kg)
The gravitational force between them can be expressed as
F = GMm/r^2
Substitute all the parameters into the formula
F = (0.667 10-11 × 20000 × 2000)/ 10^2
F = 2.668×10^-4/100
F = 2.668 × 10^-6 N
Therefore, the force of gravity between them is 26.7 × 10 ^-5 N approximately
Why would physics be used to study the movement of ocean waves?
A. Ocean waves are interesting.
B. Ocean waves are useful.
C. Ocean waves are made of matter.
D. Ocean waves are on Earth.
A brick is thrown from a wall that is 19.2 m above the ground and hits the ground 5.00 s later. What was the initial velocity of the brick?
Answer:
0
Explanation:
Given the following :
Height of wall = 19.2 m
Time taken to hit the ground = 5 seconds
Acceleration due to gravity (g) = 9.8m/s ( downward motion)
The initial velocity of the object refers to the Velocity of the object at time t = 0
Initial Velocity = g × time
Initial Velocity = 9.8 × 0 = 0
Answer:
20.6
Explanation:
If the weight of a submerged object is equal to the buoyant force, what net force acts upon the object?
A.) none
B.) upward
C.) sideways
D.) downward
Answer:
A
Explanation:
The weight is acting downwards where as the buoyant force acting upwards (opposite) direction with equal amount of force. so the opposite forces cancel out each other (because of the force amount being equal) and no net force is acting on the object.
Hope i have helped you
Thanks.
Answer:A.) none
No net force acts on the object, it will neither rise nor sink.
Explanation:
How do scientists look for black holes in space? Describe what a black hole looks like using one of the different ways of seeing the sky?
Answer:
Scientists can't directly observe black holes with telescopes however we can infer the presence of black holes and study them by detecting their effect on other matter nearby. Scientists look for black holes by using x-rays, visible light and radio waves. By a black hole, the sky looks normal then the stars closer to the black holes look like they are spinning around the black hole.
how do you calculate heat resistance
Answer:
Thermal Resistance (R-Value)
According to this definition and Equation 1, Equation 2, therefore, can be obtained. As indicated in Equation 2, the value of the thermal resistance can be determined by dividing the thickness with thermal conductivity of the specimen.
Jack travelled 360 km at an average speed of 80 km/h. Elaine
took 1.5 hours more to complete the same amount of distance.
What was Elaine's average speed for the whole journey?
km/h
Answer:
Average speed of Elain = 60 km/h
Explanation:
Total Distance covered by Jack = 360km
Average Speed of Jack = 80 km/h
Time taken by Jack to complete his journey = Distance / Average speed = 360 km / 80 km/h
Time taken by Jack to complete his journey = 4.5 hours
As it is given the both Jack and Elain travelled the same amount of distance:
Total distance travelled by Elain = 360 km
It is given that Elain took 1.5 hourse more than Jack to cover the distance, so Time taken by Elain to cover the distance is = 4.5 hours + 1.5 hours = 6 hours
Average speed of Elain = Distance/ time = 360 km / 6 hours
Average speed of Elain = 60 km/h
How does increasing the distance between two charges affect force?
Answer:
the electrical force between two charges and force are inversely related which denotes that if distance is increased then the forces holding the charges decrease and vice versa.
Hope i have helped
Thank you.
Calculate the amount of work for a car that exerts 10N and travels a distance of 5 meters.
Answer:
50 j
Explanation:
W=Force*distance
W=10N*5M
W=50 NM
n*m = joules so you can say 50joules
Spaceship 1 and Spaceship 2 have equal masses of 300kg. They collide. Spaceship 1's final speed is 3 m/s, and Spaceship 2's final speed is 2 m/s in the same direction. What is their combined momentum? A. 600 kg-m/s B. 1,500 kg-m/s C. 1,200 kg-m/s D. 900 kg-m/s
Answer:
B. 1500 kg*m/s
Explanation:
Momentum p = m* v
In any type of collision, the total momentum is preserved!
The total momentum before and the total momentum after the collision is the same. We know the mass and speed after the collision so we can calculate the total momentum.
p1 + p2 =
m1*v1 + m2*v2
m1 = me = 300 kg
v1 = 3 m/s
v2 = 2 m/s
Substitute the given numbers:
300*3 + 300+2
900 + 600
1500 kg*m/s, which is answer B.
Calculating the Volume of a Cone
Try it
Calculate the volume of the cone.
What is the volume of a cone with a height of 27 cm
and a radius of 13 cm? Round your answer to the
nearest tenth.
VE
cm)
27 cm
113 cm
Answer:
4778.4 cm³
Explanation:
Which data set has the largest standard deviation?
A. 20, 21, 23, 19, 19, 20, 20
OB. 1.6,3, 15, 4, 12, 8
O C. 3.4.3.4.3.4.3
O D. 12. 14, 13, 14, 12, 13, 12
Answer: B
Explanation:
Given the following data :
A. 20, 21, 23, 19, 19, 20, 20
B. 1, 6,3, 15, 4, 12, 8
C. 3.4.3.4.3.4.3
D. 12. 14, 13, 14, 12, 13, 12
Standard deviation = √[Σ(x - μ) / n]
Where x = scores, μ = mean value of the scores or data, n = number of values in the data.
And mean(μ) = Σx / n
Using the online standard deviation calculator :
For data A: 20, 21, 23, 19, 19, 20, 20
σ = 1.2777531299999
For data B : 1, 6,3, 15, 4, 12, 8
σ = 4.6598589800857
For data C: 3,4, 3, 4, 3, 4, 3
σ = 0.49487165930539
For data D: 12, 14, 13, 14, 12, 13, 12
σ = 0.83299312783504
Therefore data B has the largest standard deviation.
The formation of a product in the reaction is based on what
Answer:
c
Explanation:
there is formation of products when t reactants react or collied
Hydrogen/hydronium ion concentration
Answer:
Pure water is considered to neutral and the hydronium ion concentration is 1.0 x 10-7 mol/L which is equal to the hydroxide ion concentration. So the pH is the -log of the [hydronium ion].
Explanation:
Pure water is considered to neutral and the hydronium ion concentration is 1.0 x 10-7 mol/L which is equal to the hydroxide ion concentration. So the pH is the -log of the [hydronium ion].
Which letter on the diagram below represents the retina of the eye? A) A B) B C) C D) D
Answer:
THE ANSWER IS OPTION C.
What is the correct interpretation of the formula Mg3B2?
Answer: C. There are 3 magnesium for every 2 bromine
Explanation: The formula Mg3Br2 represents the compound formed from the reaction between Magnesium metal and bromine. The compound is usually called magnesium bromide formed from ionic or eoectrovalent bonding of magnesium and bromine. The compound's could be interpreted to mean for there to attain stability, there are 3 magnesium ions for every 2 bromine.
(Mg^2+) + (Br^-1)
Which describes how fast-moving particles assist in transferring thermal energy to a cup after hot tea is poured into it?
They replace slow-moving particles.
They collide with slow-moving particles.
They collide with other fast-moving particles.
They are replaced by slow-moving particles.
Answer:
They collide with slow moving particles (B)
Explanation:
Thermal energy is transferred through particles. Particles cannot be replaced, so both A and D are out. In order for thermal energy to be transferred, you must have 2 different substances with different temperatures, so C is out. That leaves you with A. I also took the test on Edge.
The fast movement of particles assisted in transferring the thermal energy represents the colliding of the slow-moving particles.
What is thermal energy?
Thermal energy is also known as the heat energy that should be generated at the time when there is an increase in the temperature that resulted in atoms and molecules to move quicker and colliding with each other. It should be transferred via particles. Also, the particles should not be replaced.
Therefore, the correct option is B.
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What is the name of the process that involves a strong attractive force that keeps atoms together
Answer:
chemical bond
Explanation:
