Answer:
Explanation:
As a skydiver falls, he accelerates downwards, gaining speed with each second. The increase in speed is accompanied by an increase in air resistance. This force of air resistance counters the force of gravity.
When a skydiver falls, he constantly accelerates. Therby, falling faster and faster. But also he is slowed down a bit due to the force of air resistance.
Which of the following is a scalar quantity?
Answer:
55
Explanation:
I hope this answer help u
Answer:
i think no. A is the coeerct answer
hope this will help you
William wanted to create a report on a geographical location with the greatest species diversity. Which ecosystem can consider for his report?
A.
the ocean
B.
a desert
C.
a tropical rain forest
D.
a coral reef
Which of the following units are used to describe acceleration?
m
b
m/s2
С
m/s
d
S
Answer:
m/s2 m/s
Explanation:
What would happen to moon if gravity no longer affected it?
Answer: The moon would continue to move on its orbital path.
Explanation:
Use the drop-down menus to complete the statements. v ion is formed. OS When electrons are lost, a ____ When electrons are gained, a ____ ion is formed.
Answer:
Positive
negative
this is on edgy
Explanation:
I got it right when I did this.
Answer:
1. Positive
2. Negative
Explanation: edge 2021
Hope this helps! :)
1. What are the main activities involved in studying physics?
I
Question 1: A car accelerates from rest, and travels 400 m in 3.5 seconds. If
the net force on the car is 12,000 N what is the mass of the car?
Explanation:
u= 0 ( because car start rest)
v=400
t=3.5
v-u/t
400-0/3.5
400/3.5
114m/s
f= 12000
f=ma
12000=m*114
m=12000/114
105 kg approx
A black lift of amber is placed in water and a laser beam travels from the water through the amber. The angle of incidence is 35 degrees while the angle of refraction is 24 degrees. What is the index of refraction of amber
Answer:
Explanation:
refractive index of ember = sin of angle of incidence / sin of angle of refraction
= sin 35 / sin24
= .5735 / .4067
= 1.41
This is refractive index of ember with respect to water
refractive index of ember with respect to water
= wμe = μe / μw
μe = wμe x μw
= 1.33 x 1.41
= 1.87
refractive index of ember with respect to air = 1.87 .
The support condition of the truss shown as Figure 1 below are such that the truss is pinned at
A and supported by pin rollers at E. The truss is subjected to loading as shown on the Figure.
a) Calculate the reactions at supports A and E.
b) Calculate the force in each member of the truss. Reproduce and fill in the given table
by placing your answers in the columns designated (Force in the member) and
(Nature of the Force i.e. strut or tie)
80KN
с
90KN
3m
D
B
60kN
4m
А
E
F
40 KN
3m
3
3
Зm
1 point
1. A child falls sideways off a sled while sledding on friction-less ice. What
happens to the velocity of the sled? *
a) It increases.
O b) It remains the same.
d) cannot be determined from the information given
c) It decreases.
Answer:
c) It decreases.
Explanation:
If you treat this as a case of momentum of the sled while sledding on a friction-less ice, then mass and velocity are directly proportional. This means increasing either mass or velocity , the momentum of the object increases proportionally.
In this question, when the child falls sideways off the sled, the mass reduces, the velocity experiences the same causing a decrease in momentum .
Determine the mass of an object if it's moving at 5 m/s and has a momentum of 50 kg*m/s
1) A parked car starts to move with a constant velocity of 3 m/s, after moving
3.4 seconds, how far did the car go?
Answer:
velocity (v) =distance(s) ÷ time (t)
Explanation:
v=s÷t
s=v×t
s=3×3.4
s= 10.2m
A book sits on a table, without moving, for two months.
In those two months:
a net force acted on the book
only gravity acted on the book
no net forces acted on the book
no forces acted on the book
Answer:
No forces acted on the book correct me if wrong please
A golf club of mass 0.215 kg has a clubhead speed of 55 m/s (~120mph) strikes a golf ball of mass 0.046 kg at rest on a tee. After the collision, the clubhead has a speed of 42 m/s (same direction of swing). Use the conservation of momentum law to find the speed of the ball just after impact.
For the Clubhead:
m1 = 0.215 kg
initial velocity(u1) = 55 m/s
Final velocity (v1) = 42 m/s
For the Ball:
m2 = 0.046 kg
initial velocity (u2) = 0 m/s
final velocity (v2) = x m/s
Solving for x:Using the law of conservation of momentum:
m1u1 + m2u2 = m1v1 + m2v2
replacing the variables
(0.215)(55) + (0.046)(0) = (0.215)(42) + (0.046)(x)
11.825 = 9.03 + 0.046x
0.046x = 2.795
x = 2.795 / 0.046
x = 60.76 m/s
Therefore, the ball will be projected at a velocity of 60.76 m/s
1. Newton's third law states that any action will have a(n) and reaction O A. Equal and opposite O B. Greater and opposite C. Equal and similar D. Equal and different
Answer: Equal and Opposite
Explanation:
A new business should be based on an entrepreneur's individual interests because the entrepreneur must have sufficient confidence to succeed. be willing to take personal responsibility. have enough determination to work alone. dedicate as many hours as needed to the work.
Answer: D) dedicate as many hours as needed to the work.
Explanation:
edge 2020
If the entrepreneur puts in dedication to duty, responsibility and long hours of work, the new business is more likely to survive.
Who are entrepreneurs?A business refers to any venture that is set up with the intention of making profit. The proprietors of new businesses are called entrepreneurs. They are saddled with the responsibility of propagating the activities of the new business.
The entrepreneur must be ready to put in:
Long hours of workResponsibilityDedicationIf the entrepreneur does all these, his/her new business is more likely to survive than ever.
Learn more about entrepreneur:https://brainly.com/question/4910555
Determine the velocity (in m/s) of the object during the last six seconds. Include a numerical answer accurate to the second decimal place. If negative, include the - sign
Answer:
0.33 m/s
Explanation:
The graph given is that of distance against time. The slope of such a graph gives the velocity of the object while travelling.
In this graph the change in distance for the last 6 seconds is given by;
The distance is : 10-8 = 2 m
The time in seconds is: 6 s
The velocity = 2/6 = 1/3 m/s
The velocity expressed in decimal form is : 0.33 m/s
A cement truck when filled weighs 42 000 N. Calculate its mass
Answer:
Mass = 4281.35 kg
Explanation:
From Newton's law of motion, the weight of an object is given by the formula;
W = mg
Where;
W is weight
m is mass
g is acceleration due to gravity which has a constant value of 9.81 m/s².
We are given weight W = 42000 N.
Thus;
42000 = m × 9.81
m = 42000/9.81
m ≈ 4281.35 kg
Debbie touches the metal doorknob to her bedroom at 7 a.m. and feels a static electric shock. In the afternoon, Debbie comes back and touches the doorknob again, but she experiences no shock.
Answer:
she had socks one and was shuffeling so she had static
Explanation:
describe the difference between particle motion in solids and liquids.
Answer:
Particles in a: gas are well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.
i hope this helps your answer
Answer:
liquids vibrate, move about, and slide past each other. solids vibrate but generally do not move from place to place.
A rope of negligible mass supports a block that weighs 30.0 N. as shown below. The maximum tension the rope can support without breaking is 50.0 N. What is the maximum
acceleration the weight can be pulled upwards with without breaking the rope? (Use g = 10 m/s)
WON
Answer:
a = 6.7 m/s²
Explanation:
The formula to apply here is :
Mass * acceleration = Tension -weight
m*a = Ft -mg -----where m is mass of block, a is acceleration , Ft is force due to tension.
Given in the question that ;
Mass of block = 3 kg
Ft = 50 N
g= 10
m*a = Ft -mg
3*a = 50-30
3a= 20
a= 20/3
a= 6.7 m/s²
The maximum acceleration will be "6.7 m/s²".
Given:
m = 3 kgFt = 50 Ng = 10By applying the formula,
→ [tex]Mass\times acceleration = Tension -weight[/tex]
or,
→ [tex]ma = Ft-mg[/tex]
By substituting the values, we get
→ [tex]3\times a = 50-30[/tex]
→ [tex]3a = 20[/tex]
→ [tex]a = \frac{20}{3}[/tex]
→ [tex]a = 6.7 \ m/s^2[/tex]
Thus the above answer is right.
Learn more:
https://brainly.com/question/14808408
5) A train travels 120 km in 90 minutes (min). What is its average speed?
Answer:
1.33 km per minute
Explanation:
120 km divided by 90 is 1.33 km
Gold is a solid at room temperature and has the basic molecular-level structure illustrated below. The outer electrons of each gold atom carry enough energy that they can move freely between different atoms. Based on this information, it can be inferred that gold would be a good material out of which to make A. shock absorbers in automobile suspension systems. B. circuit components in computer processors. C. sharp cutting tools used to shape other metals. D. structural supports on buildings or bridges.
Answer: Did you ever find the answer I’m on the same question
Explanation:
Answer:
B
Explanation:
i did it and got it wrong and it told me it was B
Which best describes the way a sound wave is sent through the radio
Answer:
sound wave-electrical wave-radio wave
Answer:
D
Explanation:
on edg
Which organ completes the majority of chemical digestion?
Answer:
The majority of chemical digestion occurs in the small intestine. Digested chyme from the stomach passes through the pylorus and into the duodenum.
Can you do a backflip
Answer:
yes a double gainer
Explanation:
Question 7
A thick uniform rubber rope of density 0.7 gcm-3 and Young Modulus 5 x 106 Nm 2 has a length 6.7 m. when
hung from the ceiling of the room, calculate the increase in length due to its own weight ?
O A. 35.79 x 10-2 m
O B. 43.81 x 10-2 m
OC.52.34 x 10-2 m
O D.61.65 x 10-2m
Answer:
Increase in length, e = 61.59 * 10⁻²m
The closest value from the options is option D. 61.65 x 10-2m
Explanation:
Young Modulus = stress/strain = (F/A)(/e/L) = F * L/A * e
where F = force; L = original length; A = area; e = increase in length
making e subject of formula; [tex]e = F * L/Y * A[/tex]
Also force, F = mass * acceleration due to gravity;
mass = density * volume = density * area * length = ρ * A * L
Therefore, force, F = ρ * A * L * g
e = ρ *A * L* L * g/Y * A = ρgL²/Y
density = 0.7 gcm⁻³ = 0.7 * 10³ kgm⁻³; g = 9.8 ms⁻²
e = {0.7 * 10³ kgm⁻³ * (6.7 m)² * 9.8 ms⁻²}/5 * 10⁶ Nm²
e = 61.59 * 10⁻² m
what is magnetism in general
Answer:
Magnetism is one aspect of the combined electromagnetic force. It refers to physical phenomena arising from the force caused by magnets, objects that produce fields that attract or repel other objects. Permanent magnets, made from materials such as iron, experience the strongest effects, known as ferromagnetism.
Explanation:
Answer:
Magnetism is a class of physical phenomena that are mediated by magnetic fields. Electric currents and the magnetic moments of elementary particles give rise to a magnetic field, which acts on other currents and magnetic moments. Magnetism is one aspect of the combined phenomenon of electromagnetism.
The average swimming speed of a salmon is about 5 ft/s. If a salmon swims at this speed for a full minute, how far will the salmon travel?
300 feet because 5x60=300 and there is 60 seconds in a min
A balloon is filled with 73 L of air at 1.3 atm pressure. What pressure is needed to change the volume to 43L?
Answer:
roughly 2.2 atm
Explanation:
using Boyle's law (P1V1=P2V2),
73×1.3=43×x
x= 2.21 or 2.2 atm