Answer:
[tex]{ \rm{acceleration = \frac{force}{mass} }} \\ \\ { \rm{a = \frac{990}{50} }} \\ \\ { \boxed{ \rm{ \: a = 19.8 \: m {s}^{ - 2} }}}[/tex]
A woman in a sprint race accelerates from rest to 8.7 m/s in 2.7 s. What is her displacement?
Answer:
23.49m
Explanation:
Distance = velocity x time
8.7 x 2.7 = 23.49m
1 thing you learned about your culture that you did not know
Answer: That There are diffrent names for my skin color
Explanation:
the circuit contains a filament bulb, connected with ........ to a ........
fill in the blanks.
Answer:
The circuit contains a filament bulb, connected with terminal to a terminal.
Explanation:
The base of the electric bulb and the metal tip of the base are the two terminals of the bulb. One is called a positive terminal while the other is called a negative terminal. The filament of the electric bulb is connected to its terminals.
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Answer:
As a capacitor is charging it takes up charging current and there's significant drop of current as the voltage increases in the capacitor.
Thus, D is the correct option.
2nd qn,
A is the correct option. Since points B, C and D are points of interaction and the force can be experienced at intervals while at A the forces will be balanced.
If the mass were to increase 12 times, what would happen to the kinetic energy?
Answer:
Having gained this energy during its acceleration, the body maintains this kinetic energy unless its speed changes. The same amount of work is done by the body when decelerating from its current speed to a state of rest. Tell me if u need any more help, have a goooood dayyyyy and pls mark brainly
Explanation:
What is the total distance travelled? What is the displacement of the object?
Isaac attempts to kick a field goal from the 40 yard line. He kicks the football at 38 m/s at a 50° angle above horizontal. If the football reaches the goal post at 3/4 of the horizontal distance kicked, then will it be high enough to cross the goal post that is 3.66 m high?
Please help asap!
Answer: Solution In photo
1. a conductor carries a current that is decreasing exponentially with time. the current is modeled as where is the current at time and is the time constant. how much charge flows through the conductor between and ?
Explanation:
what is the colour of our blood
Answer:
Q = Q0exp -t/RC
Explanation:
Q0 initial chage
RC time constant
t time
What is the quantity that is the same for all masses?
Answer:
mass: The quantity of matter which a body contains, irrespective of its bulk or volume. It is one of four fundamental properties of matter. It is measured in kilograms in the SI system of measurement.
Explanation:
please give brainliest plz followA 700 g block is released from rest at height h0 above a vertical spring with spring constant k ! 400 N/m and negligible mass. The block sticks to the spring and momentarily stops after compressing the spring 19.0 cm. How much work is done (a) by the block on the spring and (b) by the spring on the block
The work done by the block on the spring and by the spring on the block is 7.22 J.
The given parameters;
mass of the block, m = 0.7 kgspring constant, k = 400 N/mextension of the spring, x = 19 cm = 0.19 mBased on law of conservation of energy, the potential energy of the block will be converted to elastic energy of the spring, producing the given extension.
The work done by the block on the spring will be equal to work done on the block by the spring.
[tex]W = \frac{1}{2} kx^2\\\\W = \frac{1}{2} \times 400 \times 0.19^2\\\\ W = 7.22 \ J[/tex]
Thus, the work done by the block on the spring and by the spring on the block is 7.22 J.
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5 . W h ic h o f th e fo l lo w in g is N O T a fu n d a m e n ta l S .I u n it? A . M e te r B . A m p e re C . K e lv in D . Radian
Explanation:
it is an AMPERE
because 1 AMPERE = CHARGE / TIME
WHICH INVOLVES 2 UNITS
If a male runner in the fourth starting position ran the 400 m race in 44.40 s, how would you
calculate his average speed?
If a male runner in the fourth starting position ran the 400 m race in 44.40 s, then for calculating his average speed we have to divide the total distance covered by the time taken by him to cover the distance.
His average speed would be 9.0 meters/second.
What is speed?The total distance covered by any object per unit of time is known as speed. It depends only on the magnitude of the moving object. The unit of speed is a meter/second. The generally considered unit for speed is a meter per second.
The mathematical expression for speed is given by
speed = total distance /Total time
If a male runner in the fourth starting position completed the 400 m race in 44.40 s, we must divide the total distance traveled by the amount of time it took him to complete the course to get his average pace.
the average speed of the runner = 400 meters/44.40 seconds
= 9.0 meters/second
Thus, his average speed.be his average speed would be 9.0 meters per second
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The ______ describes the number of wavelengths that pass through a fixed point in a given period.
Answer:
frequency
Explanation:
Frequency refers to the number of waves that pass a given point in a given time period and is often expressed in terms of hertz (Hz), or cycles per second. Longer wavelengths will have lower frequencies, and shorter wavelengths will have higher frequencies ([link])
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If a truck weighs 195,000N what is the mass of the truck
Answer:
19500kg
Explanation:
If you divide 195000N by 10
Three astronauts guide a 100 kg asteroid safely away from their space capsule. The first astronaut pushes with a 35 N force directed 45 degrees below the x-axis. The second astronaut pushes with a 35 N force directed 45 degrees above the -axis. The third astronaut pushes with a 35 N force along the x-axis. Calculate the magnitude of the net force exerted by the three astronauts. Calculate the rate (magnitude only) at which the asteroid's velocity changes.
The magnitude of the net force exerted by the three astronauts is 84.5 N and the rate at which the asteroid's velocity changes is 0.845 m/s².
The given parameters;
mass of the asteroid = 100 kgforce by first astronaut = 35 N, at 45 degrees below x -axisforce by second astronaut = 35 N, at 45 degrees above x-axisforce by third astronaut = 35 N, at 0 degrees on x-axisThe resultant horizontal force applied by the three astronauts on the asteroid is calculated as;
Fₓ = 35cos(45) + 35cos(45) + 35cos(0)
Fₓ = 84.5 N
The rate at which the asteroid's velocity changes is calculated as;
[tex]F = ma = m\frac{\Delta v}{\Delta t} \\\\\frac{\Delta v}{\Delta t} = \frac{F}{m} \\\\\frac{\Delta v}{\Delta t} = \frac{84.5}{100} \\\\\frac{\Delta v}{\Delta t} = 0.845 \ m/s^2[/tex]
Thus, the magnitude of the net force exerted by the three astronauts is 84.5 N and the rate at which the asteroid's velocity changes is 0.845 m/s².
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Answer:
D
Explanation:
I had the question on an exam, I answered D and I got 97% on the test, I got it correct with the answer of D. TO be fair I guessed on the test and got it right, lucky guess I suppose.
Answer:
According to electrostatic concept the electric potential will be toward the negative charge and the coulomb force will be directed towards the negative charge.
Due to that 4 is the correct option.
That's what I think, all the best!
If a 2kg block of copper is heated and a temperature increase of 50C is measured, how much energy has been provided?
Answer:
...................
saya gk tau
If you pull on a car with 200N of force, what does Newton’s 3rd Law says will happen?
What is the Coriolis Effect?
Question 5 options:
the circulation route of trade winds moving from east to west
the way that tropical winds circulate to form hurricanes and large storms
the rapid movement of winds found in the upper atmosphere
the curved path of global winds due to the rotation of Earth on its axis
Answer:
An effect whereby a mass moving in a rotating system experienced a force acting perpendicular to the direction of motion and to the axis of rotation.
Temperature at which change of state occurs is... (science))
Answer: melting
Explanation: Becuse that is the science
what is uniform velocity
Answer:
this is the velocity
Explanation:
Uniform Velocity-A body is said to have uniform velocity if it covers equal distance in equal intervals of time in a particular direction, however, the time intervals may be small.
What force causes you to move upward when you jump into the air?
a. You push down on Earth with a force greater than your weight, so Earth pushes back on you with a force that is equal in magnitude but opposite in direction
b. You push down on Earth, and because Earth is so large, it pushes back on you with a force that is greater than the downward force you exerted on it
c.You push down on Earth, but because Earth is stationary, Earth cannot exert an upward force on you so internal forces from your muscles act on your body itself.
d.You push down on Earth, which causes it to move slightly down under your feet and give you the sensation that you have risen.
There is said to be a short circuit when
A. one part of a closed circuit has a very low resistance and almost all the current will flow through this part and very little current will flow through the other part.
B. one part of a parallel circuit has a very low resistance and almost all the current will flow through this part and very little current will flow through the other part.
C. one part of a parallel circuit has a very low resistance and very little of the current will flow through this part and almost all the current will flow through the other part.
D. one part of a closed circuit has a very low resistance and very little of the current will flow through this part and almost all the current will flow through the other part.
A short circuit is said to have occurred when two nodes of a circuit at different voltages are abnormally connected
There is said to be a short circuit when; One part of a parallel circuit has a very low resistance and almost all the current will flow through this part and very little current will flow through the other part
The correct option is option B.
Reason:
A circuit has to be closed or the the current path has to be closed for
current to flow. A short circuit occurs when current in a circuit flows
through an abnormal path, such as a bridge in a connection to a load that
creates a parallel path for current flow.
Almost all the current flows through the parallel path due to the low
resistance in the connection (almost zero) and the proximity to the power
source, thereby preventing current from reaching its intended destination
Therefore, the correct option is option B.;
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Does increasing mass also increase the energy transferred to another object? What is your evidence to support this claim?
Increasing mass (will / will not) increase the energy put into another object.
Answer:
Energy is essentially work done by an object or on object.
From,
W = Fd
It's directly proportional to mass.
from,
K. E = 1/2mv²
Energy is directly proportional to mass.
P. E = mgh
Energy is directly proportional to mass.
H = mc∆T
Energy is directly proportional to mass.
Thus increasing mass will increase the energy also imparted on another object since all the above eqns show that relationship.
And for 2 moving bodies
K.Ei = K.Ef(energy conservation)
m1u²1 + m2u²2 = m1v²1 + m2v²2
The relationship is the same that the greater mass the greater the impact.
A car was going at 20m/s along a straight highway. The driver slams on the break to avoid hitting a deer. The car had a negative acceleration of -2m/s^2 How much time did it take the car to stop
Khi tia tới hợp với pháp tuyến tại điểm một góc i = 30 độ thì tia phản xạ hợp với pháp tuyến tại điểm tới một góc
A. i' = 90 độ B. i' = 45 độ
C. i' = 30 độ D. i' = 60 độ
Answer:
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suppose that we attach velcro® to the non-magnetic ends of the two carts in the video and remove the mass bars, so that both carts have the same mass. we repeat the experiment shown in the video, and the carts stick together after they collide. if the launch cart travels at a speed v0, then how fast will the combined two-cart system travel after the collision?
The momentum conservation allows to find the final speed of the cars together are:
If the second car is stopped, the final speed is: v = vo / 2 If the second car moves towards the first, the final speed is: v = 0
The momentum is defined by the product of the mass and the speed of the body.
p = m v
Where the bold letters indicate vector, p is the moment, m is the mass and v the velocity.
If we define the system as formed by the two bodies, the forces during the collision are internal and the momentum is preserved, let's find the moment in two instants.
Initial instant. Before crash.
p₀ = m v₀₀₀+ m v₀₂
Final moment. After the crash.
[tex]p_f = 2m \ v[/tex]
The moment is preserved.
[tex]p_o =p_f \\m v_o + m v_o_2 = 2m \ v[/tex]
[tex]v = \frac{m v_o + v_o_2}{2m}\\ v = \frac{1}{2} \ ( v_o + v_o_2)[/tex]
We have two cases:
That the second car is initially stopped, therefore the speed is zerov = v₀ / 2
That the second car move towards the first with velocity v₀₂ = - vov = 0
In conclusion using the momentum conservation we can find the final velocity of the cars together are:
If the second car is stopped, The final speed is: v = vo / 2 If the second car moves towards the first, the final speed is: v = 0
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3. There is a thin layer of water between the blade and the ice. Suggest how this affects friction and helps the skater? .
Explanation:
Underneath the blade of skates, there is a thin layer of water from the melted ice. ... This water then acts as a lubricant (something whose purpose is decreasing friction), resulting in a smooth motion of the skates over the ice.
The amount of work (W) done on an object is equal to the force (F) needed to lift
the object (the object’s weight) multiplied by the distance (d) the object is lifted: W = F ✕ d.
Use the weight of the ball that you calculated in activity B to determine how much work
would be required to lift the ball 2 meters above the zero position:
Answer:
Weight x Distance is usually shown in graph form just multiply these to find the Force. W x D = F
Other formula's.
Finding Kinetic energy with given weight 10kg
In classical mechanics, kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s 2.