Answers
Answer:
D
Explanation:
Related Questions
HELPPPPPOP
Susan can row a boat at 4.0 m/s in still water. While trying to row
directly across a river from west to east, Susan is pulled by a current
flowing southward at 3.0 m/s. How fast does Susan row relative to the
shore?
Answers
The velocity of Susan's boat relative to the offshore when she encountered the water current is 5 m/s.
The given parameters;
Velocity of the Susan's boat in still water, Vb = 4 m/sVelocity of the water current, Vw = 3 m/sThe velocity of Susan's boat relative to the offshore when she encountered the water current is calculated as follows;
[tex]V_{b/o} ^2 = V_b^2 + V_w^2\\\\V_{b/o} = \sqrt{V_b^2 + V_w^2} \\\\\V_{b/o} = \sqrt{4^2 + 3^2}\\\\V_{b/o} = 5 \ m/s[/tex]
Thus, the velocity of Susan's boat relative to the offshore when she encountered the water current is 5 m/s.
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Could someone please help me
Answers
Answer:
the size of the shadow will be smaller due to smaller hands
How does alpha particles transfer energy to their surroundings?
Answers
A Alpha Radiation. As charged particles, such as alpha particles, move through material, energy is transferred from the radiation to the atoms or molecules that make up the material. The major energy-loss mechanisms are electronic excitation and ionization.
Hope this helps :)
Please i really need help on this
Which statement is true?
A. Magnetic North is geographic North
B. A compass needle points south
C. Magnetic electrons flow out North and into South
D. Earth's magnetic field reaches past the Milky Way.
Answers
(A magnetic compass does not point to the geographic north pole. A magnetic compass points to the earth's magnetic poles, which are not the same as earth's geographic poles. Furthermore, the magnetic pole near earth's geographic north pole is actually the south magnetic pole. When it comes to magnets, opposites attract.)
Can someone PLEASE HELP ME!!!!!!!!
Examples of mediums that waves can travel through are _______ Select ALL that apply.
A. Air
B. Water
C. Ground
D. Metal
Answers
Answer:
air and water
Explanation:
The matter through which a mechanical wave travels is called the medium (plural, media). There are three types of mechanical waves: transverse, longitudinal, and surface waves. They differ in how particles of the medium move when the energy of the wave passes through. The particles in a medium become disturbed and pass on this disturbance to the next one, and so on. So, the disturbance caused by the particles can travel through a medium such as air, ocean water, land, violin strings, Slinky coils, etc. Sound waves can travel through solids, liquids, or gases.
how to find total internal reflection
Answers
(c) Total internal reflection occurs
when the incident angle is greater than the critical angle.
n1 sin θ1 = n2 sin θ2. n1 sin θ1 = n2.hope it helpsHunger and thirst are examples of external stimulus true or false
Answers
Hunger and thirst are examples of external stimulus true or false
false External stimulus. The external stimulus includes touch and pain, vision, smell, taste, sound, and balance (equilibrium)
explique o que você da frase:"não somos seres humanos passando por uma experiência espiritual... somos seres espirituais passando por uma experiência humana
Answers
Answer:
Talvez o que ele quis dizer é que tudo o que temos não é nosso, mas de Deus, e o que fazemos é saber como será estar vivo
transivity, reflexivity, and identity refer to what kind of reasoning?
Answers
Deductive reasoning. Deductive reasoning implies the use of a given set of facts or data to deduce other facts, by reasoning logically. It rearranges information that is already known into new statements or truths. Hence transitivity, reflexivity, and identity refer to it and are necessary elements.
What are deductive reasoning and examples?Deductive reasoning is a type of deduction used in science and in life. It is when you take two true statements, or premises, to form a conclusion. For example, A is equal to B. B is also equal to C. Given those two statements, you can conclude A is equal to C using deductive reasoning.
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#SPJ2
Are these pictures below an example of reflection or refraction?
Answers
Answer:
Refraction
Explanation:
Reflection involves a change in direction of waves when they bounce off a barrier.
Refraction of waves involves a change in the direction of waves as they pass from one medium to another.
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In this closed system, a dog has sprinted to the top of a cliff. The dog (mass of 25kg) had been sprinting with a velocity of 13m/s. Using what you know about potential and kinetic energy in systems, how tall is the cliff?
Given:
mass =
height =
velocity =
Formula for a closed KE/PE system:
Plug in the numbers:
Answer (with Units):
Answers
pls help the image is down below
Answers
Answer:3 go to 2 and 4 go to 4 and 1 go 2 2 go to 1
Explanation:
9.(7 +1) Line I 9.7 +9.1 Line 2 The expression was rewritten using the Distributive Property 9. (7 + 1) equals 9. 7 which equals 63 9.7+ 9.1 equals 7 + 1 which equals 63. Submit Answer attempt 1 out of Privacy Policy Terms of Service
Answers
Answer:
Sorry
Explanation:
I really don't know what to say about this question I am not sure what to say about this
why does an elliptical galaxy look like one giant star
Answers
Explanation: An Elliptical galaxy looks like one giant star because the stars in the elliptical galaxy are often close together, making the center seem to be one giant star.
Hope this helps
Which event demonstrates electromagnetic waves transferring energy?.
Answers
Answer:
Radiation is the transfer of heat energy through space by electromagnetic radiation.
Explanation:
A race car traveling at 10 meters per second accelerates at a rate of 1.5 meters per second squared while travelling a distance of 600 meters. The final speed of the race car is approximately
Answers
Answer: 44m/s
Explanation:
The Sankey diagrams below show the energy transfers in two light bulbs. What is the efficiency of light bulb 2? Give your answer to the nearest 0.5 percent
Answers
Answer:
Divide the useful energy by the total energy and you will get the efficiency which should be between 0 and 1. Multiply by 100 to find the percentage efficiency.
Explanation:
Thea uses a hairdryer to dry her hair. The hairdryer has an efficiency of 0.5 and the total input energy is 180 kJ. How much of the energy supplied is wasted? Give your answer in joules
Answers
90kJ of the energy supplied to the hair dryer is wasted.
Efficiency is the ratio of output to input. It is given by:
Efficiency = output / input
Given an efficiency of 0.5 and the total input energy is 180 kJ. Hence:
Efficiency = output / input
0.5 = output / 180 kJ
Output = 90 kJ
Amount of wasted energy = Input - output = 180kJ - 90kJ = 90kJ
Therefore 90kJ of the energy supplied is wasted.
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NEED HELP!!! ANSWER THESE 5 QUESTIONS FOR 25 POINTS!!!! PLEASE ANSWER!! I WILL GIVE YOU BRAINLIEST
1. Therese plays lacrosse, but she has injured her ankle and has to take a few weeks off. She is finding that she has a lot of trouble sleeping since she is no longer practicing several days a week. What BEST explains this?
A.
She needs regular exercise to move oxygen through the blood.
B.
She clearly requires more exercise than most people to relieve stress.
C.
She is not releasing the endorphins that she used to, and that impacts her sleep.
D.
She is likely not maintaining the healthy habits that she did when she was practicing.
2. Imagine that you are running and want to track your heart rate. What is the easiest way to do this?
A.
Check your pulse at the wrist or neck.
B.
It can’t be done without special equipment.
C.
Close your eyes and count to 30 very slowly.
D.
Take off your shoe and check the top of your foot.
3. Guillermo has decided that he wants to be healthier, so he starts jogging. He has been at it for a week, but he is getting frustrated because he cannot run very far without getting out of breath. He is beginning to think that this is not a good exercise for him since he is not very good at it. What BEST explains why Guillermo is struggling?
A.
He probably does not have good form when he is exercising.
B.
He likely has heart or lung problems that he was not aware of.
C.
He does not have much endurance since he is new to exercise.
D.
He is just not good at jogging and needs to try something else.
4. Li Wei loves cardio and finds it very easy to fit into his schedule. Because he knows it is important to diversify his exercise routine, sometimes he runs and other days he rides his bike. What else should Li Wei consider regarding his routine?
A.
He should add some strength training.
B.
He needs to add one more form of cardio.
C.
He has too much cardio and should cut half of it.
D.
His program works for him, so he should not change it.
5. Jamar has decided that he is going to train for a marathon. He knows that it will take a lot of training, and that he will need to build his muscles. What part of the muscle does he need to build?
A.
oxygen levels
B.
fast twitch fiber
C.
slow twitch fibers
D.
large muscle mass
PLEASE NO LINKS
Answers
Answer:
1.A
2.C
3.A
4.B
5.D
Explanation:
CORRECT ME IF IM WRONG
A 400g ball moving toward the east at 3.7m/s suddenly collides head-on with a 200g ball sitting at rest. Determine the velocity of the first ball just after collision
Answers
The final velocity of the first ball after the collision is 1.167 m/s to the west.
The given parameters;
mass of the moving ball, m₁ = 400 g = 0.4 kgvelocity of the moving ball, u₁ = 3.7 m/smass of the ball at rest, m₂ = 200 g = 0.2 kgLet the velocity of the first ball after collision = v₁
Let the velocity of the ball at rest after collision = v₂
Apply the principle of conservation of linear momentum;
[tex]m_1u_1 + m_2u_2 = m_1v_1 + m_2v_2\\\\0.4(3.7)+ 0.2(0) = 0.4(-v_1) + 0.2v_2\\\\1.48 = -0.4v_1 + 0.2v_2[/tex]
Apply one-directional velocity formula;
[tex]u_1 + v_1 = u_2 + v_2\\\\3.7 - v_1 = 0 + v_2\\\\v_2 = 3.7 -v_1[/tex]
substitute the value of v₂ into the above equation;
[tex]1.48 = -0.4v_1 \ + \ 0.2(3.7 -v_1)\\\\1.48 = -0.4v_1 + 0.74 - 0.2v_1\\\\0.74 = -0.6v_1\\\\v_1 = \frac{-0.74}{0.6} \\\\v_1 = -1.167 \ m/s[/tex]
[tex]v_2 = 3.7 + 1.167\\\\v_2 = 4.867 \ m/s[/tex]
Thus, the final velocity of the first ball after the collision is 1.167 m/s to the west.
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A chemical lab isolates a gaseous element from the atmosphere that does not form chemical compounds. In which group of the periodic table is this element most likely found?
A. 18
B. 17
C. 1
D. 2
Answers
Answer:
A- 18
Explanation:
It wont let me explain how
9. A car of 1200 kg is rolling down a hill. When the car reaches a momentum of 7800 kg
m/s, what is its velocity?
Answers
Answer:
V = p/m = 7800/1200 = 6.5m/s
Explanation:
are dimensionless quantities always unitless
Answers
Important thing is that all unitless quantity is dimensionless quantity. .A dimensionless physical quantity may have an unit
Describe what it means to view something from a frame of reference.Give an example to illustrate your explanation.
Answers
like just try and try you gut it just trust me I'm a Wuman and you a man
You receive a generic email notification about an issue with the delivery of a recent order. You’re instructed to click on a link included in the email for further information about the order. When you click, it opens a webpage which asks for your account username and password before you can view the information. Which of the following is the biggest red flag in this scenario?
A. There is an issue while delivering your order.
B. The email you received was a generic notification.
C. The information about the delivery problems is not contained in the email.
D. Your username and password are required to view the information.
Answers
Answer: C. The information about the delivery problems is not contained in the email.
Explanation: please give brainliest
Highest common factor of 12r and 10
Answers
I think the number 2, not sure
Is the daughter or the science teacher correct? And why?
Answers
Answer:
The daughter. I can't really explain but practically, it happens as the daughter has stated.
You used a telescope and other mathematics to discover that Jupiter is 5. 20 au from the sun. Use the equation to find its orbital period. Round to the nearest tenth of a year. Jupiter’s Orbit: years.
Answers
The second one is 9.55
Hope I helped :)
Jorge is driving along Route 120 at a speed of 25 m/s. Seeing a red light ahead, he applies the brakes and comes to rest in 3.7 seconds. What is
his rate of acceleration?
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Answer:
I don't know...
I'm sorry
A rock is thrown upward with a speed of 2.0m/s.
a. How long will it take the rock to reach the peak?
b. What is the maximum height it can reach?
Answers
Hi there!
(A)
When the rock reaches the peak, it will have a vertical velocity of 0 m/s. We can use the equation:
vf = vi + at
vf = final velocity (0 m/s)
vi = initial velocity (2 m/s)
a = acceleration (in this situation, due to gravity = 9.8 m/s²)
t = time (s)
0 = 2 + (-9.8)t
2/9.8 = t = .204 sec
(B)
Use the equation:
d = vit + 1/2at²
d = 2(.204) + 1/2(-9.8)(.204²)
d = .204 m
