Answer:
The answer is 1.2 mExplanation:
In order to find the distance covered we use the formula
distance = velocity × timeFrom the question
velocity = 0.24 m/s
time = 5 s
We have
distance = 0.24 × 5
We have the final answer as
1.2 mHope this helps you
You go rock climing with a pack that weighs 70 N and you reach a height of 30m. How much work did you do to lift your pack?
Answer:
When u go on a rock climbing, earth exerts gravitational force on pack in downward direction (pointing towards the center of earth).
In order to climb, you need to work against work done by gravity on the pack. Hence work done by you = work done by gravity on pack
= Force x displacement = 70 x 30 = 2100 J.
So you need to do 2100 joules of work to lift your pack.
Power is the rate of work done. Therefore power = work done by you/ time in seconds
=2100/600 =3.5 watts
hence the answers is 3.5 watts.
1. A ball is thrown downward with an initial speed of 22 m/s on Earth. a. What is the acceleration of the ball? b. Calculate the displacement during the first 4 s. c. Calculate the time required to reach a speed of 60 m/s.
Answer:
Explanation:
The acceleration of the ball would be due to the downward force of gravity, 9.8m/s^2. In order to find the displacement given that interval of time, you have to use the corresponding kinematic formula:
[tex]d=v_it+at^2/2[/tex]
The initial velocity was given, the time was given, and the acceleration was given. Therefore:
[tex]d=(22m/s)(4s)+(9.8m/s^2)(4s)^2/2[/tex]
[tex]d=166.4m[/tex]
To find the required time given a desired final velocity, we can use:
[tex]v_f=v_i+at[/tex]
[tex]60m/s=22m/s+(9.8m/s^2)(t)[/tex]
[tex]38=9.8t[/tex]
[tex]t=3.9s[/tex]
Usain Bolt ran the 100m dash in 9.69 seconds. How fast does he run in the 100m dash?
Please help me I’ll mark you as Brainly
PLSSSS
Answer:
D
Explanation:
Since Ball X accelerates at 8m/s2, its acceleration will be doubled. A faster acceleration means the least mass.
You want the maximum compression of the spring to be 0.31 mm . What must be the force constant of the spring
Thee force constant can be obtained using the relation, K = F/e
What is Hooke's law?According to Hooke's law, as long as the elastic limit is not exceeded, the extension is directly proportional to the force applied. In this case, the question is incomplete since the force applied is missing.
Now, from Hooke's law;
F = Ke
K = F/e
Hence, if we have the force applied, we can conveniently obtain the force constant of the spring.
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Which of the following objects has the greatest kinetic energy?
à baseball flying through the air at 90 miles per hour
a baseball flying through the air at 45 miles per hour
O a baseball flying through the alr at 20 miles per hour
a baseball sitting on the ground
Answer:
A. a baseball flying through the air at 90 miles per hour
Explanation:
Kinetic Energy is the energy of mass in motion
If Sam pushes a table with a force of 15 N and it moves a distance of 2 m, how much work did Sam do on the table?
30 J
7.5 J
13 J
17 J
The computation of the work done is gotten by multiplying the force and distance whish will be A. 30J.
How to calculate work done?It should be noted that the formula for calculating work done is given as:
Work = Force × Distance
where,
Force = 15N
Distance = 2m
Therefore, work done will be:
= Force × Distance
= 15N × 2m
= 30 Joules.
In conclusion, the work done is 30 Joules.
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Ahab has been sent to the shops by his mother. The shops are 1200 m from his
home. If Ahab can run at an average speed of 6 m/s, how long will it take him
5
to reach the shops?
Answer:
it will take him 200secs to run to the shops
(btw 200 seconds is 3minutes and 20secs)
Explanation:
distance = speed x time
time = distance / speed
1200 ÷ 6 = 200
time = 200seconds
hope this helps
brainliest please?
x
Giving brainlist plz help it for my civics class
What was the purpose of Thomas Paine's Common Sense?
A. To tell the king that America was now independent
B. To inform colonists about British injustices
C. To convince the colonists to separate from England
Answer:
it's either A or B
Explanation:
he argued two main points (1)independence from England (2)the creation of a democratic republic.
What place on the earth has the highest air pressure? What is it’s elevation and air pressure?
Answer:
Siberia
Explanation:
The highest sea-level pressure on Earth occurs in Siberia, where the Siberian High often attains a sea-level pressure above 1050 mbar with record highs close to 1085 mbar.
NOTE: mbar = Millibar, the unit of air pressure in the metric system, commonly used in meteorology, equal to 100 pascals, 1,000 dynes per square cm (about 0.0145 pounds per square inch), or slightly less than one-thousandth of a standard atmosphere.
What is the velocity of a wave with a length of 10 m and frequency of 5hz.
The velocity of the wave is defined by the product of wavelength and frequency. The velocity of a wave with a length of 10 m and frequency of 5hz will be 50 m/sec.
What is the velocity of the wave?The velocity of the wave is defined by the product of wavelength and frequency. It is obtained from the formula of the wavelength which is given by;
[tex]\rm \lambda=\frac{v}{f} \\\\ \rm v = \lambda \times f \\\\ \rm v = 10 \times 5 \\\\ \rm v = 50\ m/sec[/tex]
Hence the velocity of a wave with a length of 10 m and frequency of 5hz will be 50 m/sec.
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hello people ~
During dry weather, while combing hair, sometimes we experience hair flying apart. The force responsible for this is
(a) force of gravity.
(b) electrostatic force.
(c) the force of friction.
(d) magnetic force.
Answer:
Electrostatic force
Explanation:
When we comb the hair
The comb gets positively charged.The hair got negatively chargedSo they get attracted and share electrons so that because of electrostatic forcedirection of the sum of the two vectors
Explanation:
V² = Vx² + Vy²
= [ 9.66 cos (0) ]² + [ 12 cos (135) ]²
= 165.31
V = root 165.31 = 12.85
can you please mark my answer brainliest ♥️...
The direction of the sum of vectors A and B is approximately 22.9 degrees north of east.
To find the direction of the sum of vectors A and B, we can use trigonometry to determine the angle with respect to the positive x-axis (east direction). The given vectors A and B have magnitudes and directions as follows:
Vector A: Magnitude = 9.66 m, Direction = East
Vector B: Magnitude = 12.0 m, Direction = Northwest (which is 45 degrees north of west)
To find the resultant vector's direction, we need to add the angles of the two vectors. The angle between the positive x-axis and vector A is 0 degrees (east direction), and the angle between the positive x-axis and vector B is 45 degrees (northwest direction). Therefore, the angle between vector A and the resultant vector is 0 degrees, and the angle between vector B and the resultant vector is 45 degrees.
To find the angle of the resultant vector with respect to the positive x-axis (east direction), we can use the tangent function:
Tan(Angle)= Opposite/Adjacent = Magnitude of Vector A/Magnitude of Vector B
Taking the inverse tangent (arctan) of both sides:
Angle = arctan (9.66/12.0)≈22.9 degrees
So, the direction of the sum of vectors A and B is approximately 22.9 degrees north of east.
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A water wave has a frequency of 8 hertz and
a wavelength of 4 meters. What is its speed?
Answer:
6 is the speed.
Explanation:
Answer:
32 m/s
Explanation:
the formula to find speed is to either multiply the wavelength by the frequency or divide the wavelength by the period. Thus the frequency of 8 times the wavelength of 4 would be 32 meters per second.
some tip to heal up eyes?
Answer:
DO rinse your eye with saline solution or clean water. ...
DO blink. ...
DO pull your upper eyelid over your lower eyelid. ...
DO wear sunglasses. ...
DON'T rub your eye. ...
DON'T touch your eye with anything. ...
DON'T wear your contact lenses. ...
DON'T use redness-relieving eye drops.
Which of the following is the definition of Specific Heat? Which of the following is the definition of Specific Heat? The movement of thermal energy from a warmer object to a colder one. The average kinetic energy of the participles in a sample. The amount of energy needed to raise the temperature of 1 gram of a substance 1 degree Celsius.
The amount of energy needed to raise the temperature of 1 gram of a substance by 1 degree Celsius
A girl cycles for 3hrs at a speed of 40 km/h. What distance did she travel?
Answer:
120 km
Explanation:
Answer:
120 km
Explanation: 3x40= 120 :)
Which planet moves the fastest and which planet moves slowest?
find two rational num between -3 and 2
Answer:
1 and -2
Explanation:
Basically rational numbers are numbers that can be expressed as a fraction and 1 can be expressed as 1/1 and -2 can be expressed as -2/1.
Please help in my home work.
change 120°F to celsius scale.
Answer:
48
Explanation:
I'm not sure if this is right I'm so sorry if its not
120 °F
to find:120 Fahrenheit as Celsius.
solution:[tex]c = (f - 32) \times \frac{5}{9} [/tex]
[tex]c = (120 - 32) \times \frac{5}{9} [/tex]
[tex]c = \frac{440}{9} [/tex]
[tex]c = 48.88889 \: degree \: celcius[/tex]
Charges of 5c and −9c are at a distance of 1m from each other. which diagram represents the force between the two charges?
Diagram (c) represents the force between the two charges. Like charges repel, each other, and unlike charges repel each other.
What is electric force?The electric force between the two charges is directly propotional to the product of the charge and inversly propotional to the square of the distance between them.
The electric force is found as;
[tex]\rm F = \frac{K q_1q_2}{r^2}[/tex]
Like charges repel, each other, and unlike charges repel each other. Both the charge is of the opposite sign they attract each other.
Hence diagram (c) represents the force between the two charges.
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Find the acceleration of a car with a mass of 1,200 kg and a force of 11,000 N.
Please help
Answer:
9.17 m/s^2
Explanation:
Formula for force is given by
F = m*a
where F is the force in newton
m is the mass of body in KG
and
a is the acceleration of body on m/s^2
_______________________________________________
Given
F = 11,000
mass = 1,200 Kg
we have to find value of acceleration
using
F = m*a
11,000 = 1200*a
=> a = 11,000 /1200 = 9.17
Thus, the acceleration of a car is 9.17 meter per second square
1. Old Faithful is a geyser in Yellowstone National Park. This geyser erupts when hot water from
underground shoots up into the air through an opening in the ground. When this happens, the ground
surrounding the water increases in temperature. What happens to the molecules in the ground when
he temperature increases?
a
More heat molecules combine with the molecules in the ground.
b
The energy of the molecules in the ground decreases.
c
The energy of the molecules in the ground increases.
d
The cold energy of the molecules in the ground decreases.
Please help thanks!!
Answer:
c
Explanation:
i just did the test
The energy of the molecules in the ground increases in the given case when the temperature increases.
• The heat of the Earth is released in both conduction and convection in Yellowstone Park.
• Conduction takes place when the transferring of heat takes place from something hot to something cold.
• On the other hand, convection takes place when the transferring of heat takes place by the movement of hot gases or liquids like water, air, or magma to a cooler region.
• The same phenomenon takes place underneath the Yellowstone. The convection of the molten rock in the magma chamber underneath transfers heat via the caldera of Yellowstone.
• Near the surface of the ground, the convection of heat water results in the hot springs and geysers in the park.
Thus, when the temperature increases, the energy of the molecules in the ground also increases resulting in the formation of geysers. The correct answer is option c.
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Four model rockets are launched in a field. The mass of each rocket and the
net force acting on it when it launches are given in the table below.
Rocket
Mass (kg)
Force (N)
1
4. 25
120
2
2
3. 25
120
3
5. 50
120
4
4. 50
120
Which rocket has the highest acceleration?
A. Rocket 3
B. Rocket 1
C. Rocket 4
D. Rocket 2
In the given four models of rockets, the rocket with the highest acceleration is rocket 2.
Acceleration of the rocketsAcceleration is the rate of change of velocity with time. The acceleration of the rockets can also be determined from Newton's second law of motion with the applied force and mass of each rocket as shown below;
F = ma
where;
F is the applied forcem is the massa is the accelerationa = F/m
Rocket 1a = 120/4.25
a = 28.24 m/s²
Rocket 2a = 120/3.25
a = 36.92 m/s²
Rocket 3a = 120/5.5
a = 21.82 m/s²
Rocket 4a = 120/4.5
a = 26.7 m/s²
Thus, the rocket with the highest acceleration is rocket 2.
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A sample of liquid nitrogen has a temperature of –320.8 °F. What is its temperature in degrees Celsius and in kelvins?
Answer:
Celsius: -36 degrees. Kelvin: 237.15 degrees.
Explanation:
Do the formula by multiplying the number by the formula it is selected to.
A labourer carries a load of 500N to a distance of 100m
The work done is??
Explanation:
Hey there!
Given;
Load = 500N
Distance= 100m
Acceleration due to gravity= 9.8m/s^2.
We know;
Work done = F * d
W = (500*9.8)*100
W= 490000J
Therefore, the work done by the carrier is 490000J.
Hope it helps...
Calculate the momentum of a 0. 145 kg baseball being thrown at a speed of 40. 0 m/s
unit measure for time
calculate the density if a body has a mass of 0.7kg and volume of 1l
Answer:
The answer is 0.7 kg/LExplanation:
The density of a substance can be found by using the formula
[tex]density = \frac{mass}{volume} \\ [/tex]
From the question
mass = 0.7 kg
volume = 1 L
We have
[tex]density = \frac{0.7}{1} \\ [/tex]
We have the final answer as
0.7 kg/LHope this helps you
A 35.0- g bullet strikes a 5.0- kg stationary piece of lumber and embeds itself in the wood. The piece of lumber and the bullet fly off together at 8.6 m/s. What was the speed of the bullet before it struck the lumber? Define the bullet and the wood as a system.
please show work , help
Answer:
1237.17 m/s
Explanation:
Applying the law of conservation of momentum,
m₁v₁ + m₂v₂ = (m₁ + m₂)v0.035v₁ + 0 = 5.035 x 8.60.035v₁ = 43.301v₁ = 43.301/0.035v₁ = 1237.17 m/s