Momentum = (mass) x (velocity)
On the way to the plate, the momentum of the ball was
(0.15 kg) x (40 m/s this way <==) = 6 kg-m/s this way <==
After the hit, the momentum of the ball was
(0.15 kg) x (45 m/s that way ==>) = 6.75 kg-m/s that way ==>
The CHANGE in momentum was 12.75 kg-m/s that way ==>
That's the momentum that the bat gave it.
Change in momentum = Impulse
Impulse = (force) x (length of time the force lasts)
12.75 kg-m/s = (force) x (0.002 second)
Force = (12.75 kg-m/s) / (0.002 second)
Force = 6,375 Newtons, that way ==>
a lorry has a mass of 32000 kilograms. each tyre has an area of 400 cm squared in contact with the ground. calculate the pressure exerted on the ground if the lorry has 6 tyres
Answer:
Your answer is 1306666.6667 Pascal
A6 cm object is 8 cm from a convex lens that has a focal length of 2.7 cm. The image is 4 cm from the lens. The height of the image is ?? cm.
Answer:
7.8cm
Explanation:
Answer:
7.8
Explanation:
Based on information from the periodic table, what does this image represent?
What happens to the position of an object as an unbalanced force acts on it? Give an example.
Hi! I'm a few days late since I just saw this question just now, but I'll answer anyway.
Answer:
When an unbalanced force acts on a moving object, the velocity of the object will change. Change in velocity means a change in speed, direction, or both. For example, if you kick a soccer ball and it moves from one place to another, it means that unbalanced forces are acting upon it. The ball moves from one place to another after kicking it so the position changed.
Construct arguments based on evidence about the applications, benefits, and problems of nuclear energy as an alternative energy source.
Answer:
Explanation:
Clean Energy Source It generates more than 800 billion kilowatt hours of electricity each year and produces more than half of the nation's emissions-free electricity. This avoids more than 470 million metric tons of carbon each year, which is the equivalent of removing 100 million cars off of the road.
If I'm wrong I'm sorry
If I'm right thank you and (brainliest plz)
Which is a device that stores electric charge by separating positive and negative charges?
O a conductor
O a dielectric
O a resistor
O a capacitor
Answer:
The last one, a capacitor
Explanation:
Right on edge.
Can Someone Please Help Me For 10 Points.
John steps outside and observes that clouds have started to form in the sky, and it looks like it could rain. Which of the following is the best way to explain why the clouds have formed?
A. The temperature of the air is below zero.
B. There is a low amount of moisture in the air.
C. The warm, wet air in a low pressure system has risen up and cooled down.
D. The wind is traveling at a slow speed.
Answer: C
Explanation: The warm, wet air in a low pressure system has risen up and cooled down.
Please give Brainliest if you can!
Answer: C
Explanation: When John stepped outside, he saw the clouds because the warm, wet air in a low pressure system has risen up and cooled down. This is what will fall down as rain fall.
Find the current in amperes if 96 mC of charge pass through a wire in 8.4 s.
Answer:
Approximately 11.43
Explanation:
Using the formula charge=current×time
then current=charge/time. That then will be C=96/8.4=11.4285714286 so approximately 11.43
The current would be 825.6 × 10⁻³ amperes if 96 mC of charge passes through a wire in 8.4 seconds .
What is an electric charge ?
Due to the physical characteristic of electric charge, charged material experiences a force when it is exposed to an electromagnetic field.
The charge on one electron is -1.6 ×10⁻¹⁹ coulomb.
As given in the problem we have to find the current in ampere if 96 mC of charge passes through a wire in 8.4 seconds ,
9.6 mC = 9.6 × 10 ⁻³ Coulombs
The electric current = electric charge × time period
= 9.6 × 10 ⁻³ × 8.6
= 825.6 × 10 ⁻³ ampere
Thus, the current would be 825.6 × 10 ⁻³ amperes if 96 mC of charge passes through a wire in 8.4 seconds .
Learn more about an electric charge from here, refer to the link ;
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1.Energy is used when a force acts over a.....................
.................................................
2.All objects have the same weight have:
a)the same place on Earth
b)the same mass
c)the same volume
d)pull of gravity on them
Answer:
the same mass answer b) but i dont know first question
Which of the following is an example of the transformation of gravitational potential energy into motion energy (kinetic energy
A tire rolling along a level floor
A ball going up after being tossed into the air
gley
ve
A drop of water falling from a faucet into a sink
None of these because gravitational potential energy cannot be transformed into motion energy
Answer:
A drop of water falling from a faucet into a sink
Which type of energy is the result when a drum is hit with a drumstick?
OA. electrical energy
OB. light energy
OC.
sound energy
OD.
all of these
Reset
Submit
Answer:
That drummer has mechanical energy as he moves the drumsticks to hit the drums and cymbals. So I'm pretty sure it's OD. sound energy.
¯\_(ツ)_/¯¯
Which of the cars above are traveling at the same velocity?
A) c and d
B) b,c,d and f
C) b,c and d
D) b and c
Answer:
b,c,d,and f are the car traveling at the sane velocity
4. What is the period of the microwaves in the above question?
Answer:
The period of a wave is the time for a particle on a medium to make one complete vibrational cycle. Period, being a time, is measured in units of time such as seconds, hours, days or years. The period of orbit for the Earth around the Sun is approximately 365 days; it takes 365 days for the Earth to complete a cycle.
Use the drop-down menus to complete the sentences. Tetra fish that live in caves are blind and have small eyes that do not work. This is an example of a . A harbour seal's flipper and a human hand have a very similar structure, but function differently. This is an example of a .
Answer:
vestigial structure
Homologous structure
Explanation:
Did the assignment.
Tetra fish that live in caves are blind and have small eyes that do not work. This is an example of a vestigial structure.
A harbour seal's flipper and a human hand have a very similar structure, but function differently. This is an example of a Homologous structure.
What is vestigial structure?
Some organisms have elements that seem to be left over from an earlier ancestor but have no apparent purpose. For instance, because they are evolved from reptiles with legs, certain snakes have pelvic bones despite not having any. The human vermiform appendix is another instance of a structure that serves no purpose.
Vestigial structures are these inactive, purposeless structures. Other examples of vestigial structures are the wings of flightless animals like the ostrich, the leaves of some cacti, the remains of whale pelvic bones, and the eyes that are blind in cave mammals.
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Which of the following statements would be accepted as a valid criticism of
the big bang theory in scientific circles?
A. It cannot be tested directly.
B. It does not explain how stars are clustered.
C. It can be revised at a later date.
0
D. It is just an educated guess.
Answer:b
Explanation:
The statement B would be accepted as a valid criticism of the Big Bang Theory in scientific circles, It does not explain how stars are clustered.
What is Big Bang Theory?The Big Bang hypothesis is the most widely accepted cosmological model for describing the origins of the observable universe and its subsequent large-scale development.
Statements would be accepted as a valid Big Bang Theory in scientific circles is that it does not explain how stars are clustered.
Hence, option B is correct.
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For the element 35 17 C1, give the number of... 1. protons 2. neutrons 3. electrons
Answer:
Chlorine 35:
Atomic mass 35.43
Number of protons 17
Number of electrons: 17
Number of neutrons: 18
Explanation:
1. A 1000 kg bag of sand has an
acceleration of 0.5m/s/s. What is the
force on the bag?
Answer:
We conclude that the force on the bag is 500 N.
Explanation:
Given
Mass m = 1000 kgAcceleration a = 0.5 m/s²To determine
Force F = ?
We know that when a force is applied to a body, it produces acceleration.
Important Tip:
We can determine the force on the bag using the formula F = maUsing the formula
[tex]F = ma[/tex]
where
[tex]F[/tex] is the force [tex]m[/tex] is the mass[tex]a[/tex] is the accelerationnow substitute m = 1000, and a = 0.5 m/s² in the formula
[tex]F = ma[/tex]
[tex]F = (1000)(0.5)[/tex]
[tex]F=500[/tex] N
Therefore, we conclude that the force on the bag is 500 N.
an aircraft landing on an air craft carrier is brought to a complete stop from an inital velocity of 215km/hr in 2.7 seconds. what is iys acceleration in m/s2
3. A train covers 168 km in 4 hours. How much distance will it cover in 80
minutes?
Answer:
56km
Explanation:
168 ÷ 240 = 0.7
0.7 × 80 = 56km
240 is the amount of minutes in 4 hours.
We divided 168 by 240 to get the distance covered in 1 minute. Afterwards, we needed 80 minutes so we multiplied the answer by 80.
What if we minned astroids
A halfback makes a turn on the football field. The halfback sweeps out a path that is a portion of a circle with a radius of 12-meters with a tangential velocity of 5 m/s. Determine acceleration of the halfback.
Answer:
The right answer is "15.072 m/s".
Explanation:
The given values are:
Radius,
= 12 m
Time,
= 5 m/s
As we know,
⇒ [tex]s=\frac{d}{t}[/tex]
On substituting the given values in the above formula, we get
⇒ [tex]=\frac{2 \pi(12)}{5}[/tex]
⇒ [tex]=\frac{2\times 3.14\times 12}{5}[/tex]
⇒ [tex]=\frac{75.36}{5}[/tex]
⇒ [tex]=15.072 \ m/s[/tex]
The distance between two particles is 2 centimeters. If the distance is increased to 4 centimeters, the force will be ?
Answer:
The new force is 1/4 of the previous force.
Explanation:
Given
[tex]Initial\ Distance = 2cm[/tex] ---- [tex]r_1[/tex]
[tex]New\ Distance = 4cm[/tex] --- [tex]r_2[/tex]
Required
Determine the new force
Let the two particles be q1 and q2.
The initial force F1 is:
[tex]F_1 = \frac{kq_1q_2}{r_1^2}[/tex] --- Coulomb's law
Substitute 2 for r1
[tex]F_1 = \frac{kq_1q_2}{2^2}[/tex]
[tex]F_1 = \frac{kq_1q_2}{4}[/tex]
The new force (F2) is
[tex]F_2 = \frac{kq_1q_2}{r_2^2}[/tex]
Substitute 4 for r2
[tex]F_2 = \frac{kq_1q_2}{4^2}[/tex]
[tex]F_2 = \frac{kq_1q_2}{4*4}[/tex]
[tex]F_2 = \frac{1}{4}*\frac{kq_1q_2}{4}[/tex]
Substitute [tex]F_1 = \frac{kq_1q_2}{4}[/tex]
[tex]F_2 = \frac{1}{4}*F_1[/tex]
[tex]F_2 = \frac{F_1}{4}[/tex]
The new force is 1/4 of the previous force.
2. David roller skates 15 miles in 75 minutes. What is his average speed in miles per hour?
1
What is the critical angle for a ray trying to pass from glass (n = 1.52) into water (n = 1.33)? (Water n = 1.33, Air n = 1.00) (Unit = deg)
Answer:
59.52
Explanation:
59.5 in sigfigs
got it right on Acellus
Answer:
61.05
Explanation:
correct on acellus
If an object free-falls for t seconds from rest to d distance, how far will the object fall from rest in twice the elapsed time?
Answer:
When the time of fall is doubled, the height of fall will be quadrupled
Explanation:
Given;
height of fall, h = d m
time of fall, t = t s
initial velocity of the object, u = 0 m/d
The height of fall of the object is calculated from the kinematic equation below;
[tex]h = ut + \frac{1}{2} gt^2\\\\h = 0 + \frac{1}{2} gt^2\\\\h = \frac{1}{2} gt^2\\\\2h = gt^2\\\\g = \frac{2h}{t^2}[/tex]
where;
g is acceleration due to gravity, which is constant
if the time of fall is doubled, the height of fall is calculated as;
[tex]\frac{2h_1}{t_1^2} = \frac{2h_2}{t_2^2} \\\\\frac{h_1}{t_1^2} = \frac{h_2}{t_2^2}\\\\(Note: h_1 = d, \ and \ t_1 = t)\\\\h_2 = \frac{h_1t_2^2}{t_1^2} \\\\h_2 = \frac{(d)(2t_1)^2}{t_1^2} \\\\h_2 = \frac{(d)(2t)^2}{t^2}\\\\h_2 = \frac{(d)\times 4t^2}{t^2}\\\\h_2 = 4d[/tex]
Therefore, when the time of fall is doubled, the height of fall will be quadrupled
A large body of water with land all around it
Answer:
i think its a lake
Explanation:
Answer: What do you call a large body of water surrounded by land?
A lake is a large body of water surrounded by land on all sides.
Explanation:
he Big Bang Theory suggests....
a
The universe began in an instant.
b
The universe was born from clouds of dust and gas.
c
The single point containing the universe exploded and the universe stretched and expanded.
d
Gravity began to form stars and galaxies from clouds of dust and gas.
e
Both A and C.
f
Both B and C.
g
None of the above.
Answer:
C
Explanation:
To know more head to.
https://phys.org/news/2015-12-big-theory.html
Answer:
i think a and c
Explanation:
What was Orsted’s historic discovery?
Answer:
The electric current in a wire can deflect a compass needle if its magnetized.
Explanation:
SCIENCE
What does the nucleus of the cell control?
A. Life functions
B. Cell transport
C. Waste excretion
D. Energy production
Answer:
I believe A would be the best answer
Explanation:
Cell transport means things entering and leaving the cell, this would be controlled by the cell membrane
Waste excretion is controlled by the vacuole
Energy production is the mitochondria (the mitochondria is the power house of the cell)
Life functions include cellular reproduction and the nucleus contains the genetic information to do this
Answer:
a
Explanation:
Tremendous energy is released by nuclear reactions is a measure of the energy required to bond the nucleus together. Where does this energy come from?
Answer:
Fission is the opposite of fusion and releases energy only when heavy nuclei are split. As noted in Fusion, energy is released if the products of a nuclear reaction have a greater binding energy per nucleon than the parent nuclei.
The amount of energy released during nuclear fission is millions of times more efficient per mass than that of coal considering only 0.1 percent of the original nuclei is converted to energy. Daughter nucleus, energy, and particles such as neutrons are released as a result of the reaction