Answer:
55mph
Explanation:
a 0.11kg moving hockey puck is caught by a 80kg goalie who then slides on the frictionless ice at 0.076 m/s. the initial velocity of the hockey puck was 55mph
what is velocity ?Velocity is a parameter which can be defined as the rate at which the object change the position with respect to time, basically speeding the object in a specific direction.
It is a vector quantity which shows both magnitude and direction and The SI unit of velocity is meter per second (ms-1). the change in magnitude or the direction of velocity of a body, then it is said to be accelerated.
Finding the total velocity is simple but few calculations and basic conceptual knowledge are needed.
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I WILL MARK BRAINIEST
Answer:
i think answer b
Explanation:
List some factors that would affect the speed of the car.
Answer:
The power of the car, the gear ratio, weight of the car, aerodynamics of the car, grip of the tires on the road, calorific value of the fuel used, and friction would affect the speed of the car.
Explain experimental physics.
Answer:
This is a category of physics dealing with the observable phenomena, and experimental aspects by investigation, and scientific testing to measure the properties of matter, and energy.
Answer:
Experimental physics is the category of disciplines and sub-disciplines in the field of physics that are concerned with the observation of physical phenomena and experiments.
I hope you helped^_^
Follow me for more answersHI CAN ANYONE PLS ANSWER DIS PLS!!!!!!
Answer:
Volume of an object (L): blue 105.00, yellow 105.00, green 102.50, red 101.25
Density of an object (kg/L) Mass / Volume: blue 1, yellow 1, green 1.014, red .992
Sink or Float: blue sink, yellow sink, green float, red float
hope this helps
1. How do you relate the law of inertia to the balanced and unbalanced force?
??
Explanation:
I don't get you right
7. A solid wax candle has a volume of 1,700 mL. The candle has a mass of 1.5 kg (1,500 g). What is the
density of the candle?
Answer:
The answer is 0.88 g/mLExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\[/tex]
From the question
mass = 1500 g
volume = 1700 mL
We have
[tex]density = \frac{1500}{1700} = \frac{15}{17} \\ = 0.88235294...[/tex]
We have the final answer as
0.88 g/mLHope this helps you
Answer:
0.88
Explanation:
density = mass/volume
density = 1500/1700
density = 0.88
how much faster will a car be going if it accelerates at 1 m/s/s for a total of 60 seconds.
Answer:
Vf = 60 [m/s]
Explanation:
To solve this problem we must use the following equation of kinematics.
[tex]v_{f}= v_{i}+(a*t)[/tex]
where:
Vf = final velocity [m/s]
Vi = initial velocity = 0
a = acceleration = 1 [m/s^2]
t = time = 60 [m]
Now replacing:
Vf = 0 + (1*60)
Vf = 60 [m/s]
Which is true A. You can see both lunar and solar eclipses from outside the shadow.B. You can see neither lunar and solar eclipses from outside the shadow. C. You can see only lunar from outside the shadow. D. You can see only solar eclipses from outside the shadow. .plz.help
Answer:
A
Explanation:
A lunar eclipse occurs when the Moon enters the Earth's shadow. A solar eclipse occurs when the Moon's shadow falls on the Earth. They do not happen every month because the Earth's orbit around the sun is not in the same plane as the Moon's orbit around the Earth.
Which statement about elements and atoms is true?
Atoms are the smallest unit of an element.
Atoms are made of particles called elements.
Elements are made of more than one type of atom.
Elements are easily broken down into atoms by a physical reaction.
Patty decides to try another experiment. From the
same branch, she drops a large, heavy rock and a
small pebble. What would happen this time?
Answer: They will fall at the same time
Explanation:I had a google doc about this
When air resistance is considered, the effect of the air resistance will cause the rock to fall faster than the pebble which will be delayed due to its lesser weight. In the absence of air resistance, both rock and pebble will fall down at the same time.
What are free fall and air resistance?Free fall is a motion of an object in which the force of gravity is the only force acting upon it. A body moving upwards would not be considered to be falling. But if the body falls under the effect of the force of gravity, it is said to be in free fall.
Free fall is a type of motion in which no air resistance is considered and the force acting upon an object is only gravity. All bodies under such conditions fall with an equal rate of acceleration, regardless of their masses.
As a body falls through the air, have suffered some degree of air resistance. Air resistance is the collisions of the surface of an object with molecules present in the air. The factors that have a direct effect on the amount of air resistance are the cross-sectional area and the speed of the object.
As the rock had greater weight than the pebble in the absence of air resistance it will fall faster than the pebble.
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YO CAN YALL HELP ME IN DIS!
Answer:
i guess it will be mass or volume, but not sure
Explanation:
because the blocks volume will be same as the displaced water, then u will check the mass or volume of the water to see what the volume of a object will be.
A baseball is hit into the air with a velocity of 27 m/s. How high does it go?
Answer:
Explanation:
If a baseball is hit into the air with a velocity of 27 m/s, we want to determine the maximum height of the ball. Using the projecile formula;
Max height H = u²/2g
u is the initial velocity of the body = 27m/s
g is the acceleration due to gravity = 9.81m/s²
H = 27²/2(9.81)
H = 729/19.62
H = 37.16m
Hence the ball went 37.16m high
Considering the activity series given for nonmetals, what is the result of the below reaction? Use the activity series provided. F > Cl > Br > I
Br2 + NaF Right arrow.
no reaction
Na + FBr2
NaBr + F2
Na2F + Br2
Answer:
A.) no reaction. Edge 2020.
Explanation:
There will be no reaction.
The activity series is also known as the reactivity series. It arranges elements in order of reactivity.
Given the activity series; F > Cl > Br > I, we need to predict whether the reaction; Br2 + NaF will proceed or not.
Looking at the reaction, Br is less than F in the activity series so Br can not displace F in NaF. Hence, there will be no reaction.
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2.Suppose you lifted the ring when the counter-clockwise orbiting marble was at the top of the circle. Describe the direction of the path that the marble would take.
3. Explain why the marble moved the way it did with the ring in place.
4. Explain why the marble moved the way it did when the ring was removed.
Answer:
3. The marble's trajectory was constantly being changed by running into the ring, forced it to move along the shape of the ring.
4. Once the ring was removed, the marble's momenum kept it going in a straight path as the ring was no longer forcing it to turn.
Explanation:
A block slides to the right on a rough horizontal surface. The forces exerted on the block are shown above. Which of the following statements about the frictional force Ff exerted on the block is true?
A) It is the only force acting on the block that is caused by microscopic interactions.
B) It does not depend on the materials that the block and the surface are made of.
C) It is caused by gravitational interactions between the atoms in the block and the atoms in the surface.
D) It is the sum of all the microscopic contact forces between the bottom of the block and the surface.
Answer:
The correct option is;
A) It is the only force acting on the block that is causes by microscopic interactions
Explanation:
The force of friction is the force due to the relative motion of two surfaces in the presence of a perpendicular force acting between the surfaces.
The force of friction comes into play from the additional effect of the adhesion that is present between surfaces, the roughness of the surfaces, the contamination or deformation of the surfaces which is generated by the microscopic interactions be between the two surfaces, rather than the applied force.
The characteristics of the friction force, you can find which statements are correct:
D) It is the sum of all the microscopic contact forces between the bottom of the block and the surface.
The force is an image of the interactions between bodies, these interactions create binding energy that can be formed and broken, the friction force is the macroscopic sum of all these microscopic interactions between two different surfaces.
The magnitude of the friction force depends on the type of each surface, on rough surfaces the interaction area is high, therefore the friction force is high, on smooth surfaces the interaction area is small, therefore the force is small, a way to create superficiality is to place a layer of air between the two surfaces.
Based on these explanations, let's review the different statements:
A) False. The friction forces are caused by interaction, but between two bodies not within the same body, this is what maintains the shape and volume of the body.
B) False. The contact area depends on each surface and therefore each type of material
C) False. The gravitational force is this in the line of interaction between the two bodies, in this case the force is perpendicular to movement, not in the line of interaction.
D) True. It is the sum of the interactions in the contact between the two bodies, it agrees with the explanation above.
Using the characteristics of the friction force, we can find the statements that are correct is:
D) It is the sum of all the microscopic contact forces between the bottom of the block and the surface.
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What was the main aim behind Wegener's continental drift theory?
A. To explain major climate changes
B. To explain geological similarities
C.to explain landforms of area
D. All of the above
5. An ion consist of 12 electrons and 11 proton. What is the charge
on the ion?
Answer:
-1
Explanation:
Electrons have a negative charge and protons have a positive charge. (+11) + (-12) = -1
The speed of an object changes only when it is acted on by an unbalanced force.
Answer:
If an object has a net force acting on it, it will accelerate. The object will speed up, slow down or change direction. An unbalanced force (net force) acting on an object changes its speed and/or direction of motion. An unbalanced force is an unopposed force that causes a change in motion.
Explanation:
I hope this helps you out and if your feeling generous plz mark brainliest it helps me a lot thank you:)
What is linear motion?
Answer:
Linear motion is a one-dimensional motion along a straight line, and can therefore be described mathematically using only one spatial dimension.
Explanation:
2. The Himalayas in central Asia are the tallest mountains in the world. But fossils of seashells can be found high in these mountains, far from any ocean.
How do you think they got there?
Answer:
The sea level could have been much higher in the past.
Explanation:
The tectonic plates shifted and the mountain rose from there.
They are trapped throughout the rock whereas the seashells have been on the floor of a modest seafloor.
These same containers dropped down on the base of the silt level or sheet, as well as those layering finally became rock.Few more million generations previously, the Indian civilization or the subcontinent crashed well with the continents of Asia, making the Himalayan mountains rock which thus previously were such a sea level.
Thus the above response is appropriate.
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A man weighing 490N on earth weighs 81.7N on the moon.His mass on the moon is kg
His mass is 50 kg . . . on the Moon, on the Earth, in the capsule rocketing between them, and on Halley's comet if he ever goes there.
Answer:
50kg
Explanation:
The mass of a man on the Earth and the moon is the same, so we only need to use the 490N weight on Earth.
The formula for mass is m=w/g. Plugging in the values, we can determine that m=490N/9.8m/s^2. (g is gravitational constant, which is approximately 9.8m/s^2 on Earth)
The reason that the unit in the answer is in kg is because one newton (N) is 1kg*m/s^2. The m/s^2 is cancelled out by the m/s^2 in the gravity constant, so it leaves kg.
m=50kg
A man is riding his 4-wheeler at 60 km/hr. If he is riding it constantly at
this rate for 1.5 hours, how far did he ride?
Answer: 90 km
Explanation: 60 * 1.5
A ball is thrown vertically upwards from a point on the ground. It was observed at a height h twice with a time interval Δt. The initial velocity of the ball is?
HURRRY PLEASSSSEEE
Energy required for cellular respiration can be processed from ____.
A) Carbohydrates
B) Fats/ Lipids
C) Proteins
D) All of the above
Answer:
fats / liquids or proteins one of them
Explanation:
..........
Answer:
D) All of the above
Explanation:
I googled it :)
the amount of a good or service a
producer wants to sell
scarcity
O supply
demand
O capital
entrepreneurshipb
Answer:
I can't understand you're que... plzz write in a correct way..
Why is the nucleus positive in charge?
Answer:
The nucleus has an overall positive charge as it contains the protons. Every atom has no overall charge (neutral). This is because they contain equal numbers of positive protons and negative electrons. These opposite charges cancel each other out making the atom neutral.
Explanation:
Which type of energy is stored in a battery?
O A. Nuclear energy
O B. Electrical energy
O C. Electromagnetic energy
O D. Chemical energy
Answer:
Chemical energy is in a battery
The type of energy is stored in a battery is Chemical energy (option d)
Batteries store chemical energy. When a battery is charged, a chemical reaction occurs inside it, converting the reactants into different products. This process stores energy in the form of chemical bonds within the battery's components.
When you use the battery to power a device, the reverse chemical reaction takes place, releasing the stored energy as electrical energy. This flow of electrons creates an electric current that powers the device connected to the battery.
The capacity of a battery to store and release energy depends on the type and quantity of chemicals used in its construction. Different types of batteries, such as alkaline, lithium-ion, or lead-acid batteries, have varying chemical compositions, affecting their energy storage capabilities and overall performance.
So, the correct option is (d).
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An object is launched at a velocity of 20 m/s in a direction making an angle of 25° upward with the horizontal. (Given gravity g =9.8 , sin 25° = 0.42 and cos 25° =0.91) What is the maximum height reached by the object at B?
Answer:
Explanation:
a) The formulas for the components Vx and Vy of the velocity and components x and y of the displacement are given by x = V0 cos(θ) Vy = V0 sin(θ) - g t
x = V0 cos(θ) t y = V0 sin(θ) t - (1/2) g t2
In the problem V0 = 20 m/s, θ = 25° and g = 9.8 m/s2.
The height of the projectile is given by the component y, and it reaches its maximum value when the component Vy is equal to zero. That is when the projectile changes from moving upward to moving downward.(see figure above) and also the animation of the projectile.
Vy = V0 sin(θ) - g t = 0
solve for t
t = V0 sin(θ) / g = 20 sin(25°) / 9.8 = 0.86 seconds
Find the maximum height by substituting t by 0.86 seconds in the formula for y
maximum height y (0.86) = 20 sin(25°)(0.86) - (1/2) (9.8) (0.86) 2 = 3.64 meters
b) The time of flight is the interval of time between when projectile is launched: t1 and when the projectile touches the ground: t2. At t = t1 and t = t2, y = 0 (ground). Hence
V0 sin(θ) t - (1/2) g t2 = 0
Solve for t
t(V0 sin(θ) - (1/2) g t) = 0
two solutions
t = t1 = 0 and t = t2 = 2 V0 sin(θ) / g
Time of flight = t2 - t1 = 2 (20) sin(θ) / g = 1.72 seconds.
c) In part c) above we found the time of flight t2 = 2 V0 sin(θ) / g. The horizontal range is the horizontal distance given by x at t = t2.
range = x(t2) = V0 cos(θ) t2 = 2 V0 cos(θ) V0 sin(θ) / g = V02 sin(2θ) / g = 202 sin (2(25°)) / 9.8 = 31.26 meters
d) The object hits the ground at t = t2 = 2 V0 sin(θ) / g (found in part b above)
The components of the velocity at t are given by
Vx = V0 cos(θ) Vy = V0 sin(θ) - g t
The components of the velocity at t = 2 V0 sin(θ) / g are given by
Vx = V0 cos(θ) = 20 cos(25°) Vy = V0 sin(25°) - g (2 V0 sin(25°) / g) = - V0 sin(25°)
The magnitude V of the velocity is given by
V = √[ Vx2 + Vy2 ] = √[ (20 cos(25°))2 + (- V0 sin(25°))2 ] = V0 = 20 m/s
A ball is thrown vertically down from the edge of a cliff with a speed of 4 m/s,
how high is the cliff, if it took 12 s for the ball to reach the ground?
Two asteroids with masses 5.34 x 108 kg and 2.06 x 104 kg are separated by a distance of 5,000 m. What is the gravitational force between the asteroids? Newton's law of gravitation is F. Gm}m2. The gravitational constant gravity Gis 6.67 x 10-11 N.m²/kg². A. 1.47 x 10-⁶N
B. 4.00 N
C. 1.24 x 10³³ N
D. 2.93 x 10-¹⁰N
Answer: D
Explanation: just completed this question on a p e x