Answer:
Explanation:
Turtle ba lls
Answer:
4.8 seconds
Explanation:
Ft=change in momentum
Initial momentum=mv=24*20=480 kg*m/s
new momentum=mv=24*16=384 kg*m/s
change in momentum=96 kg*m/s
Ft=change in momentum
20(t)=96
t=4.8 seconds!
What made heliocentrism scientific?
Which of the following equations correctly models a balanced single replacement reaction?
Answer:
d
Explanation:
is the answer
Which statement correctly defines power
Answer:
The ability to do something or act in a particular way, especially as a faculty or quality.
"The power of speech"
b. What is the man's weight on Mars where the acceleration due to gravity is
3.7 m/s2 ? Show your answer in both Newtons and pounds.
Answer:
How much is the mass of man?
An arrow that is pulled back by a bow has which type of energy?
Answer:
Kinetic energy
Explanation:
Kinetic energy is the energy of motion, and the arrow is in motion.
Which is NOT an example of evidence that shows a chemical reaction occurred?
change in color
change in temperature
change in shape
bubbles, fizzing
Please answer quick - You find a chain of volcanoes along a coast on land, not too far inland from
the ocean. The region experiences frequent large earthquakes. What type of
plate boundary is this? What types of plates are involved? Where is this type of
boundary found in California?
Shrill sound is of -------------- *
Higher frequency
Lower frequency
Higher amplitude
Lower amplitude
Answer:
Higher frequency.
Explanation:
Sound are mechanical waves that are highly dependent on matter for their propagation and transmission.
Sound travels faster through solids than it does through either liquids or gases. A student could verify this statement by measuring the time required for sound to travel a set distance through a solid, a liquid, and a gas.
Mathematically, the speed of a sound is given by the formula:
[tex] Speed = wavelength * frequency [/tex]
Generally, the frequency of a sound wave determines the pitch of the sound that would be heard.
A shrill sound refers to a type of sound that is typically sharp, high pitched and as such has higher frequency.
Hence, shrill sound is of higher frequency.
Donna shines a flashlight and a laser pointer on a sheet of paper. She holds each device at an equal distance from the paper. How does the light hitting the paper from each device appear different?
The light from the flashlight lights up a larger area of the paper.
The light from the laser pointer lights up a larger area of the paper.
The light from the flashlight magnifies a larger area of the paper.
The light from the laser pointer magnifies a larger area of the paper.
Answer:
A the light on the flash light lights up a bigger area
I'm pretty sure this is right.
Explanation:
Answer:
a
Explanation:
1) A 2.5 kg ball strikes a wall with a velocity of 8.5 m/s to the left. The ball bounces off with a
velocity of 7.5 m/s to the right. If the ball is in contact with the wall for 0.25 s, what is the
constant force exerted on the ball by the wall?
Answer:
Force = -10 Newton.
Explanation:
Given the following data;
Initial velocity = 8.5m/s
Final velocity = 7.5m/s
Time = 0.25 seconds
Mass = 2.5kg
To find the force exerted;
First of all, we would determine the acceleration of the ball;
Acceleration = (v - u)/t
Acceleration =(7.5 - 8.5)/0.25
Acceleration = -1/0.25
Acceleration = -4 m/s²
Now, to find the force exerted;
Force = mass * acceleration
Force = 2.5 * -4
Force = -10 Newton
Note: The force is negative because it is an opposite reaction.
3 examples of newtrons 2 law
Explanation:
1) Kicking a ball.
2) Capture the ball by hand.
3) Push a car.
2 t of ferrous scrap at a temperature of 20 degrees is heated to the melting point and melted. How much to consume?
Answer
Calculate the amount of heat needed to melt 2.00 kg of iron at its melting point (1809 K), given that: ?Hfus = 13.80
Please help me like rn it’s an embergency
Answer:
first one
Explanation:
electromagnetism is the forces and fields associated with charge
plaque contains billions of bacteria true or false
Answer:
true
Explanation:
Answer: True
Explanation:
A weight-lifter raises a 2000 N weight through a vertical height of 2.0m in 0.80 s.
What useful power does he develop in doing this?
A
800 W
B
3200W
с
4000 W
D
5000W
Answer:
D. 5000W
Explanation:
Given the following data;
Force = 2000N
Distance = 2m
Time = 0.8s
To find the power;
First of all, we would determine the workdone by the weightlifter
Workdone = force * distance
Workdone = 2000 * 2
Workdone = 4000N
Now, we can find the power using the formula;
Power = workdone/time
Substituting into the equation, we have
Power = 4000/0.8
Power = 5000 Watts
How do the temperature curves in your graph show the range of temperature?
Answer:
Step-by-step Explanation:
An optical device that reflects light ?
Answer:
Mirror
Explanation:
Use the picture to answer the question below-
Which change in wave properties would show as an increase in amplitude?
H E L P P P P
What is the cheetahs momentum?
Answer:
Momentum is mass*velocity. Cheetah: 74*31 = 2294 kg-m/s.
As time goes on, the ENTROPY in a closed system should increase. This is because of which Law?
A) Conservation of Energy
B) Conservation of Momentum
C) 1st Law of Thermodynamics
D) 2nd Law of Thermodynamics
E) None of these
Answer:
The answer is D
The second law of thermodynamics
The speed of sound through diamond is about 12,000 m/s. The speed of sound through wood is about 3,300 m/s. Which statement explains
why the speed of sound is different through these materials? (1 point)
Answer: They have different rigidities.
Explanation:
How can you defined work done in term of kinetic energy, potential energy, and the force?
When you stretch a spring, there is energy in the spring's
potential energy store. What word completes the sentence?
Answer:
field strength i think, I'm not that sure.
Explain the different types of energy in a working wind turbine
Answer:
A wind turbine converts the kinetic energy of the wind into mechanical power.
The wind moves the turbine and the turbine produce energy.
ASAP
A spring is stretched downward by a certain length and, as a result, exerts a
force in the upward direction. What happens to the force exerted by the
spring if the length by which it is stretched is reduced by half?
O A. The force exerted by the spring is reduced by half.
B. The force exerted by the spring is doubled.
O C. The force exerted by the spring reduced by one quarter.
O D. The force exerted by the spring remains unchanged.
Answer:
A
Explanation:
Hooke's law! F(spring)=-kx
There's no tricky square law here. The spring constant doesn't change, only x (distance stretched) changes. Therefore, if distance is halved, Force will be halved.
HELP ME PLEASEE!!!THIS IS SCIENCE
Answer:
B.
Explanation:
Which law best describes this behavior of gases in the Sun?
Answer:
The extreme pressure from the weight of the gases that make up the Sun raises the temperature of the core enough for the nuclear reactions to take place, Which law best describes this behavior of gases in the Sun? A. Charles law.
Explanation:
if it is helpful....... plzz like and follow
ANSWER BOTH ASAP NEED HELPPP
On hot sunny days or days with thin clouds, the temperature over the land is warmer than the temperature over the water. The warmer air rises and the cooler air moves over the land, producing sea breezes. This means that,
A: Water takes longer to heat up than the land
B: Soil warms up more slowly than the water
C: The air above the land becomes cool and rises
D: Land takes longer to heat up tan the water
Answer:
i think it would be a but i am not 100% sure on that
A battery sends a current through a metal wire.
The current in a wire is 3.7 A.
Calculate the charge that flows into the wire in 13 s
Answer:
I hope this a little bit.