Answer:
Any two forces that are always opposite from one another are :
Explanation:
1. action forces
2. reaction forces
(ii) Calculate the force required to accelerate a mass of 60 kg at 2.5m/s2
force =
[2]
Answer:
Force = 150 Newton.
Explanation:
Given the following data;
Mass = 60kg
Acceleration = 2.5m/s²
To find the force;
Force = mass * acceleration
Force = 60 * 2.5
Force = 150 Newton.
Therefore, the force required to accelerate this mass is 150 Newton.
Please help.....Which of the following is most likely the distance between the Milky Way and another galaxy?
22,926 miles
30 million kilometers
10.8 billion light years
19.2 astronomical units
Answer:
The answer would be 10.8 billion light years
Answer:
10.8 billion light years is most likely the distance between the Milky Way and another galaxy.
Hope this helps :)
write the relation between horsepower and Watt?
Explanation:
Horsepower is related to watt as: 1 horsepower = 746 W = 750 W approximately. 1 horsepower (HP) = 750 watt (approx.) The power is one watt when one joule of work is done in one second.
Answer:
1HP = 746 watts
Explanation:
The relation between Horsepower and watt is that One Horse Power is equal to 746 Watts .
[tex]\large{\boxed{ \sf 1 HP = 746 Watts = 0.746 kW }}[/tex]
Brainliest if right.
Someone fires a 0.04 kg bullet at a block of wood that has a mass of 0.5 kg. (The block of wood is sitting on a frictionless surface, so it moves freely when the bullet hits it). The wood block is initially at rest. The bullet is traveling 300 m/s when it hits the wood block and sticks inside it. Now the bullet and the wood block move together as one object. How fast are they traveling?
Answer:
Explanation:
Remark
This is a conservation problem.
The momentum before impact = momentum after impact
momentum before
m = 0.04 kg
v = 300 m/s
momentum after
m = 0.5 kg + 0.04kg That's the mass of the block and bullet
v = ?
Solution
0.04 * 300 = 0.54 * x
12 kg m/s = 0.54 kg * x
12 / 0.54 = x
x = 22.22 m/s
Just need to confirm an answer
A ball of mass 0.2 kg is kicked straight up from ground level. Ignoring air resistance, its gravitational potential energy as it reaches its maximum
height is 10 J. The initial speed with which the ball was kicked is most nearly
(A) 20 m/s (B) 10 m/s (C) 5 m/s (D) 1 m/s
Answer:
B
Explanation:
Remark
If, when it reaches its maximum height where the PE is the greatest, that the maximum energy is when the ball is first kicked. That would mean its starting energy is 10 Joules.
Formula
KE = 1/2 m v^2
Givens
KE = 10 J
m = 0.2 kg
v = ?
Solution
10 = 1/2 * 0.2 * v^2
10 * 2 = 0.2 * v^2
20 = 0.2 * v^2
20/0.2 = v^2
100 = v^2
v = 10 m/s
a wave has wavelength of 20m and a speed of 450m/s. what is the frequency of the wave
Answer:
22.5/s is the frequency of the wave
Given:
Wavelength, λ = 20 mSpeed of light, C = 450 m/sWe know,
→ [tex]Frequency (f) = \frac{C}{\lambda}[/tex]
By substituting the values,
[tex]= \frac{450}{20}[/tex]
[tex]= 22.5 \ Hz[/tex]
Thus the approach above is right.
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A 1 kg water bottle have 0.15m above your head How much GPE does it have
Answer:
GPE = 1.47 Joules.
Explanation:
Given the following data;
Mass = 1kg
Height = 0.15m
We know that acceleration due to gravity is equal to 9.8m/s²
To find the gravitational potential energy;
Gravitational potential energy (GPE) is an energy possessed by an object or body due to its position above the earth.
Mathematically, gravitational potential energy is given by the formula;
[tex] G.P.E = mgh[/tex]
Where;
G.P.E represents potential energy measured in Joules.
m represents the mass of an object.
g represents acceleration due to gravity measured in meters per seconds square.
h represents the height measured in meters.
Substituting into the formula, we have;
GPE = 1*9.8*0.15
GPE = 1.47 Joules.
The drawing on the right shows a man (mass = 70kg) and the child (mass = 35 kg) push each other apart. The man moves away with a speed of 0.3 m/s relative to the ice.
Calculate the velocity of the child relative to the ice.
LET MOMENTUM EQUATION GUIDE YOUR THINKING...
SHOW YOUR WORK - INCLUDE UNITS
Answer:
Hope it would help you.Refer to the attachment..
What property of the wave is labeled F?
amplitude
crest
trough
wavelength
What kind of electricity is the buildup of electric charge on an object?
magnetic
static
both ^^
or None
On her trips from home to school, karla drives along the streets after exiting the driveway. She drives 1.85 miles south, 2.43 miles east and 0.35 miles north. determine the magnitude of karla's resultant displacment.
What is the magnitude of the largest net force that can be produced by combining a force of 6.0 N
and a force of 8.0 N? What is the magnitude of the smallest such force?
Answer:
10N
Explanation:
The formula for calculating the resultant is expressed as;
R = √F1²+F2²
F1 and F2 are the forces
Given
F1 = 6.0N
F2 = 8.0N
R = √6²+8²
R = √36+64
R = √100
R = 10.0N
Hence the magnitude of the net force is 10N
What information is needed to calculate the speed of a falling object?
A. Height that it was dropped from
B. All of these are needed to calculate the velocity
C. Volume of the object
D. Mass of the object
The specific heat of oxygen is 3.47 J/gºC. If 750 J of heat is added to a 24.4 g
sample of oxygen at 295 K, what is the final temperature of oxygen? (Round
off the answer to nearest whole number)
Answer:
304 K
Explanation:
A 2 kg object is falling at 3 m/s at what rate is gravity working on the object
Answer:
6kgm/s
Explanation:
Let the rate of gravity be the momentum of the body
Momentum = mass * velocity
Given
Mass = 2kg
velocity = 3m/s
Momentum = 2 * 3
Momentum = 6kgm/s
Hence the rate at which the gravity is working is 6kgm/s
A wave has a frequency of 875 hz and a wavelength of 352 m. At what speed is this wave traveling 
Answer:
308,000 or 30.8×10^3
Explanation:
v=f×lamda
v is ?, f is 875Hz, lamda is 352m
v=875×352
v=308,000
v=30.8×10^3 m/s
Help someone :(((((((((((((((
Wave Speed (M/s) = Frequency (Hz) x Wavelength (M)
Wave Speed = 3500Hz x 2.8M = 9800M/s
Answer = Top one
Answer:
A
Explanation:
3500Hz*2.5m=9800m/s
Give Brillienst please!!!!
Two lamps, each having reisistance of 3 Ohms, connect in a series. What current will flow if a voltage source of 5 V is connected at input?
The current across the circuit is equal to 0.833A if a voltage source of 5 V is connected at the input.
What is Ohm's law?Ohm’s law states that the potential difference across a circuit is directly proportional to the current flowing through it. Assuming temperature and all other physical conditions remain constant. Resistance's S.I. unit is rho (Ω), and the current raises the temperature.
The mathematical expression of potential difference provided by Ohm/s law is:
V = IR
Where V is the voltage difference and R is the resistance and I the current flowing.
Given, the resistances in a series circuit, R = 3 + 3 = 6 ohm
The voltage difference across the circuit, V = 5 V
The current flowing through the circuit will be:
V = I × R
I = V/R
I = 5/6
I = 0.833 A
Therefore, the current across the circuit is equal to 0.833 A.
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At the base of a hill, a 90 kg cart drives at 13 m/s toward it then lifts off the accelerator pedal). If the cart just barely makes it to the top of this hill and stops, how high must the hill be?
Answer:
the height of the hill is 8.622 m.
Explanation:
Given;
mass of the cart, m = 90 kg
speed of the cart at the base, v = 13 m/s
Let the height of the hill = h
Apply the principle of conservation of energy, to determine the height of the hill.
¹/₂mv² = mgh
¹/₂v² = gh
[tex]h= \frac{1}{2} \times \frac{v^2}{g} \\\\h = \frac{1}{2} \times \frac{13^2}{9.8} \\\\h = 8.622 \ m[/tex]
Therefore, the height of the hill is 8.622 m.
An inclined plane of length 4.5m and vertical height 1.5m is use to lift the load of 100N. what effort is required if the efficiency is 80%?
Answer:
Answer is efficiency = 50%
Need help with these 2 questions ??????!!!!! Hurry this is due soon
Answer: The first one is A and C
Explanation:
Answer:
2 is A
3 is C
Explanation:
The reason why two is a is think of it like this. atoms have to be combined together to make a molecule. So in other words you need letters to create a word.
3 is c because in a recipe you have to have the right proportions. Just like you have to have the right proportions of atoms to create a molecule.
Please answer all of these questions and you will get the brainlist
Answer:
1. L=mgh= 0.1x4x9.8=4.0J
2. L= 2x3x9.8=59J
(???) Is iz allergic to peanut butter jigglys, I JIGGLE IN THE WIND!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
H E L P A S A P P P P P P P P P !
Answer:
Higher Amplitude = Higher Energy.
Explanation:
As you could see the higher number the amplitude is the energy also gets higher!
____ works against gravity to keep a parachute open as it
glides downward.
A. Flight
B. Terminal velocity
C. Weight
D. Air resistance
Answer:
D
Explanation:
The air is catching against the parachute causes the person to not fall at deadly speeds.
Answer:
D. Air resistance (also called drag) slows it down. Photo: Parachutes are made from strong lightweight nylon and have to be packed very carefully if they're to open correctly when they're deployed.
Pls someone help me plss guys!!!
I will give you brainiest
Radioactivity is a part of our earth - it has existed all along. Naturally occurring radioactive materials are present in its crust, the floors and walls of our homes, schools, or offices and in the food we eat and drink. There are radioactive gases in the air we breathe. Our own bodies - muscles, bones, and tissue - contain naturally occurring radioactive elements.
A runner starts a race at rest and reaches her top speed of 8.6m/s in 19.0s. What is the average acceleration?
Answer:
Average acceleration = 0.45 m/s²
Explanation:
Given the following data;
Initial velocity, u = 0m/s
Final velocity, v = 8.6 m/s
Time, t= 19 seconds
To find the average acceleration;
In physics, acceleration can be defined as the rate of change of the velocity of an object with respect to time.
This simply means that, acceleration is given by the subtraction of final speed from the initial speed all over time.
Mathematically, acceleration is given by the formula;
[tex]Acceleration = \frac{initial speed - final speed}{time}[/tex]
Substituting into the formula, we have;
Acceleration = (8.6 - 0)/19
Acceleration = 8.6/19
Average acceleration = 0.45 m/s²
A printer has a power of 100 W. It takes 30 seconds to print out a document. How much energy will it
have used?
100W translates to 100 watts consumed in 1 hour. Assuming the printer consumes electrical energy at a steady rate, then: 100 ÷ 60 = 1.6667 watts per minute. 1.6667 ÷ 2 = 0.8333 watts consumed in 30 seconds.
A printer has power of 100 W, and it takes time of 30 seconds to print out the document, then the power consumed in 30 seconds will be 0.8333 W.
What is Power?The quantity of energy moved or changed per unit of time is termed as power in physics. The watt, or one joule per second, is the unit of power in the International System of Units. Power is also referred to as activity in historical texts. A scalar quantity is power.
Power is connected to other factors; for instance, the power required to move a land vehicle is equivalent to the sum of the vehicle's velocity, traction force on its wheels, and aerodynamic drag.
Assuming the printer consumes electrical energy at a steady rate, then:
100 ÷ 60 = 1.6667 watts per minute.
Now, calculate the power consumed in 30 seconds,
1.6667 ÷ 2 = 0.8333 watts.
Therefore, the power consumed in 30 seconds will be 0.8333 watts.
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PLWASE HELP ILL DO ANYTHING
A stone at rest is dropped from a cliff, and the stone hits the ground after a time of 3 s. What is the stone's velocity when it hits the ground? O
2.94 m/s
3.3 m/s
323 m/s
29.4 m/s
Answer:
The stone is accelerating at 9.8 m/s². If we multiply that by three seconds, we get 29.4 m/s.
How do airplanes stay in air?
Answer:
A plane's engines are designed to move it forward at high speed. That makes air flow rapidly over the wings, which throw the air down toward the ground, generating an upward force called lift that overcomes the plane's weight and holds it in the sky. The wings force the air downward and that pushes the plane upward.
Explanation:
planes stay in air because of 2 reasons :
Power of thier enginesAerodynamicsPlane's wings are designed to push the air downwards and letting the plane to lift off and stay in air..