Acceleration = (change in speed)/(time)
Change in speed = (60-15) = 45 km/hr
Time for the change = 30 sec
Acceleration = 1.5 km/hr-sec
my gosh im in fifth grade and need an answer stat dude what causes lightning
A. build up of electrical charges in the clouds
B. flow of electrical charges among clouds
C. light energy created in the clouds
D. reflection of light in the clouds
Answer:
it's either A or B because lighting is an electrical discharge caused by imbalance between storm clouds and the ground
Explanation:
pretty sure it's A though
help plz anyone ?????
Answer:
Most likely, it will be harder to get strong magnets to change phase because they have more density.
What happens to the position of an object as an unbalanced force acts of it? Give an example
Answer:
When unbalanced forces act on an object at rest, the object will move. ... Second, when unbalanced forces act on a moving object, the velocity of the object will change. Remember that a change in velocity means a change in speed, direction or both speed and direction.........Eg.If you kick a football and it moves from one place to another, it means that unbalanced forces are acting upon it. Ball moves from one place to another after kicking it.
Answer:
unbalanced forces could change speed,direction
Explanation:
Example
if two people are pulling a rope and the other one is stronger the rope moves toward the stronger one cause the force is unbalanced
please help answer question
Answer:
C = 1.01
Explanation:
Given that,
Mass, m = 75 kg
The terminal velocity of the mass, [tex]v_t=60\ m/s[/tex]
Area of cross section, [tex]A=0.33\ m^2[/tex]
We need to find the drag coefficient. At terminal velocity, the weight is balanced by the drag on the object. So,
R = W
or
[tex]\dfrac{1}{2}\rho CAv_t^2=mg[/tex]
Where
[tex]\rho[/tex] is the density of air = 1.225 kg/m³
C is drag coefficient
So,
[tex]C=\dfrac{2mg}{\rho Av_t^2}\\\\C=\dfrac{2\times 75\times 9.8}{1.225\times 0.33\times (60)^2}\\\\C=1.01[/tex]
So, the drag coefficient is 1.01.
Many vehicles leave the right shoulder of the pavement due to
brake failure.
improper interior inspections.
driver distraction.
lack of oil pressure.
Answer:
driver distraction
Explanation:
Studies and historical data show that the major cause of this is due to driver distraction. When driving many times a driver may look somewhere other than the road and get distracted which accidentally causes the driver to steer outside of the right shoulder of the pavement. This can also be due to the driver becoming tired/sleepy after driving for countless hours or even making a quick maneuver due to oncoming traffic getting too close. Regardless, all of these fall under driver distraction.
I really need help please ASAP
What is the missing force?
Answer: -110N
Explanation:
Assign a variable x to the unknown force. The net force was given as +25N, which means the sum of the two forces must equal +25N.
Subtract 135N on both sides
135 + x = 25
x = -110N
The negative sign indicates direction because force is a vector.
A car accelerates on a road at 4.2 m/s2 for 6.5 seconds. How far does the car go doing this?
Answer:
mmmmmmmmmmm
Explanation:
mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
What is the mass of an object that requires 150N of force in order to accelerate it at 10m/s 2
Answer: 15kg
Explanation:
F = ma ; Newtons 2nd of Motion
150 = m(10)
m = 15kg
At which type of plate boundary did the Himalayas form?
A.
Divergent
B.
Convergent
C.
Transform
TRUE or FALSE: An object's mass changes depending on which planet it is located.
A. TRUE
B. FALSE
Answer:
Fales
Explanation:
That's why scientists and engineers often measure an object's mass—how much matter the object contains—rather than its weight. Mass stays the same regardless of location and gravity. You would have the same mass on Mars or Jupiter as you do here on Earth. Your weight is different on other planets due to gravity.
What other issues, besides addiction, might go along with overuse of phones?
Which of the following objects has no kinetic energy?
A picture on a wall
A waterfall
A ball flying through the air
A hockey puck sliding across the ice
Answer:
a picture on a wall. because it's not moving
Plz help me!
How do electromagnetic fields work?
Answer:
Electromagnetic field, a property of space caused by the motion of an electric charge. A stationary charge will produce only an electric field in the surrounding space. If the charge is moving, a magnetic field is also produced. An electric field can be produced also by a changing magnetic field.
Clara made a chart to summarize some of the evidence that supports the big bang theory.
A 2 column table with 2 rows labeled evidence for the big bang theory. The left column is labeled category of evidence with entries redshift, cosmic microwave background radiation (CMB). The second column is labeled description with entries light source and observer move farther apart, light observed shifts to a longer wavelength, indicates receding galaxies, red-shifted to the microwave region, temperature much higher now than at time of big bang.
Which best describes Clara’s error?
During redshift, the light source and observer move closer together, not farther apart.
The CMB is blue-shifted, not red-shifted, to the microwave region.
The temperature of the CMB is cooler, not hotter, than at the time of the big bang.
The redshift indicates approaching, not receding, galaxies.
Answer:
The temperature of the CMB is cooler, not hotter, than at the time of the big bang.
Explanation:
Hope it help
Mark me as brainliest
Answer:
C
Explanation:
EDG
Work done against gravity is equal to change in
O kinetic energy
O potential energy
O frictional energy
Answer:
potential
Explanation:
Which kind of force(s) cause acceleration?
Answer:
unbalanced force,
Explanation:
The bigger the unbalanced force acting on the object the bigger the acceleration of the object. The more mass the object has, the more inclined it is to resist any change to its motion.
Someone please help me with this
Answer:
it's
Non-isolated system (conserved)
Explanation:
this is the answer for this hope it works
How many atoms in total are there in a molecule of sulfur trioxide, S03
There are 4 atoms total.
In a molecule of sulfur trioxide, [tex]S0_{3}[/tex] , there are total of four atoms. Three atoms are of oxygen and one of sulfur.
What is molecule?A molecule is a group of two or more atoms held together by attractive forces known as chemical bonds.
What is atom?
Atom is the smallest particle of a chemical element that can exist.
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Please help ASAP please
Answer:
I would say 3N
Explanation:
Answer:
The first one is 12N and the second one is -22 m/s2
Explanation:
I'm pretty sure these are correct, i just finished that unit in school. I hope this helps:) Have a great day, God bless!
You push on a light object (small mass) with a certain amount of force and it moves. If you push just as hard on a heavier object (large mass) it will move _____ the light object. a. Faster than b. slower than c. the same as
Answer: B
Explanation:
It will move slower than the light the object. The equation is Newton's 2nd Law of F = ma. If the force is constant, and the mass changes to something larger, then the acceleration must become smaller. You could also just do this yourself, push two objects with your hands. The heavier one will move slower assuming you used the same amount of force
A force of 162 N is applied to an object causing it to accelerate at a rate of 3.8 m/s^2. What is its mass?
A. 0.2 kg
B. 616 kg
C. 43 kg
D. 102 kg
Answer:
43 kg
Explanation:
Force (F) = 162 N
acceleration (a) = 3.8 m/s²
mass (m) = ?
We know
F = m * a
162 = m * 3.8
m = 162 / 3.8
m = 43 kg
It's mass is 43 kg.
Hope it will help you :)
A student switches the torch on and sees that it gives out a bright light.
After several minutes, the torch begins to fade in brightness.
Give a reason for this fading in brightness.
Answer:
no more fire duhh
Explanation:
Answer:
The fuel has ran out
Explanation:
Fuel could be Wood,cloth those are longer ones, theres also short term fuel sources such as gasoline, Cloth and wood are the most common for torches usually combined with alcohol, So either No more oxygen which is not likely, or the fuel source is running out
What do we use to spin magnets to supply the city of Portland electricity?
a. power from the Columbia
b. gasoline power
c. solar power
Answer:
a
hydroelectric dams on the Columbia river
Explanation:
Newton's Second Law says that the force applied to an object is equal to the mass of the object times its acceleration. In other words, F=ma. Use a rearranged version, a=F/m in order to calculate the acceleration of a 5 kg skateboard when you give it a push of 20 N. PLEASE HELP FAST!!
Here the force is 20 N and mass is 5 kg
acc= Force/mass
acc=20/5= 4m/s²
Which force stops the car from moving?
The force of motion
The force of speed
The force of gravity
The force of Friction
Answer:
The force of friction.
Explanation:
Gravity keeps the car on the ground.
Motion Allows the car to move.
The force of speed doesnt make sense.
Friction would cause the car to stop moving.
How much work is done when a 5 N force moves a block 4 m?
A toy rocket has a mass of 2.0 kg. The rocket has a force of 8.0 N acting on it. What is the acceleration of the rocket?
6.0 m/s^2
0.25 m/s^2
16.0 m/s^2
4.0 m/s^2
Answer:
force=mass × acceleration
8=2 × acceleration
acceleration= 8/2= 4 m/s²
Answer:4 m/s²
Explanation:
The air going into the tyre was warmed up by the pumping. What effect will this have on the motion of Gad molecules in the air in the tyre?
Answer:
they are constantly bouncing everywhere and creating preasure
Explanation:
The motion of gas molecules in the air in the tyre will speed up.
What is motion of molecules?Molecular motion is defined as the movement of molecules in a certain direction. The molecular motions are affected by heat and temperature. This is because the temperature is the measurement of the average kinetic energy of the molecules and represents the motion of molecules.
What is kinetic energy?The kinetic energy of an object is the energy which it possesses due to its motion. It gives the work needed to accelerate a body of a given mass from rest to its stated velocity. To calculate kinetic energy
[tex]K.E = \frac{1}{2} mv^{2}[/tex]
Kinetic energy depends on the velocity of the object which means that when the velocity of an object doubles, its kinetic energy quadruples.
Kinetic energy must always be either zero or a positive value.
Kinetic energy is not a vector.
The gas molecules inside the tyre exert pressure on the walls of the tyre as the molecules collide with the walls of the tyre.
When the air in the tyre becomes hotter, the pressure rises as more collisions.
The pressure in the tyre increases as there will be more frequent collisions with the tyre wall.
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A hockey ball accelerates from 0 m/s to 25 m/s in 0.05 seconds. What is the acceleration of the ball?
Answer:
500
Explanation:
25/0.05