Answer:
C. Potential energy
D. Kinetic energy
Explanation:
Someone had broken into Sam's house! Police came to investigate and a crime scene analyst collected evidence: broken glass, a piece of torn cloth, swabs from blood drops. Sam watched the crime scene analyst and thought he'd like to do that one day. It was a scientific way to solve puzzles! "You'd better get busy and study!" said his mother. "You know forensic scientists must have strong backgrounds in __________."
A) chemistry.
B) geology.
C) law.
D) mathematics.
The weight of a boy having a mass of 50 kg is __N.
???
Answer: 490N
Explanation:
Newton is the unit for force. Force = mass x acceleration
F=N m=50kg a=9.8 (earth's acceleration of gravity)
F=50X9.8
F≈490N
Why do clouds, and sometimes precipitation, typically form along a frontal boundry such as a warm front?
Answer:
In the case of a warm front, the warm, less dense air rises up and over the colder air ahead of the front. Again, the air cools as it rises and its moisture condenses to produce clouds and precipitation.
Explanation:
Hope this helps u
Crown me as brainliest:)
Explain the conversion of energy in a roller coaster. Explain how energy is converted
1. A boat initially moving at 10 m/s accelerates at 2 m/s2 for 10 s. What is the velocity of the boat after 10 seconds?
Answer:
5 m/s is the answer so yeah
Contact and Non-contact Forces Assignment
Now that you have learned about forces, complete and submit the following assignment.
For the following situations, describe the contact and non-contact forces that are involved.
Situation
Contact Force(s)
Non-Contact Force(s)
A book sitting on a shelf
A soccer player kicking a ball; the ball soaring through the air and landing on the ground
A hiker in the woods reading her compass to determine which direction to go
A child on a sled; first, the child is sitting at the top of the hill, waiting his turn; then, the child pushes off and slides down the hill, eventually coming to a stop.
Answer:
I didn't know the subject but I researched and understood so...here goes!!
A book resting on a shelf: contact force- reaction force
non contact force: gravitational force
Soccer ball- contact force- air resistance
non contact force- gravitational force
Compass- contact force- reaction force
non contact force- magnetic force
child on sled- contact force- friction
non contact force- gravitational force
Explanation:
1. Express the following quantities in scientific notation.
a. 5800 m
c. 302 000 000 m
b. 450 000 m d. 86 000 000 000 m
Answer:
a. 5.8 ³
C. 3.02⁸
D. 4.5⁵
B.8.6¹⁰
Explanation:
A shopper in a supermarket takes a box of sugar from a shelf that is 1.5 m high because he is going to bake some muffins. He also needs to get some blueberries. The sugar has a weight of 5N. What Potential Energy did the sugar have before it was taken from the shelf?
Answer:
7.5 Joules.
Explanation:
Potential energy can be defined as an energy possessed by an object or body due to its position.
Mathematically, potential energy is given by the formula;
[tex] P.E = mgh[/tex]
Where, P.E represents potential energy measured in Joules.
m represents the mass of an object.
g represents acceleration due to gravity measured in meters per seconds square.
h represents the height measured in meters.
Given the following data;
Weight of sugar = 5N
Height = 1.5m
[tex] P.E = mgh[/tex]
But we know that weight = mg = 5N
Substituting into the equation, we have;
[tex] P.E = 5 * 1.5 [/tex]
[tex] P.E = 7.5 J[/tex]
Therefore, the potential energy the sugar had before it was taken from the shelf is 7.5 Joules.
The potential energy of the sugar at the given position before it was taken from shelf is 7.5 J.
The given parameters;
height of the shelf, h = 1.5 mweight of the sugar, W = 5 NThe potential energy of the sugar at the given position before it was taken from shelf is calculated as follows;
P.E = mgh
P.E = Wh
P.E = 5 x 1.5
P.E = 7.5 J
Thus, the potential energy of the sugar at the given position before it was taken from shelf is 7.5 J.
Learn more here:https://brainly.com/question/18160141
you must record your daily work outs on a?
A. activity chary
B. journal
C.calendar
D. fitness log
Answer:
D. Fitness log
Explanation:
because you are working out it would me the most since to use something specifically for work outs and exercise
I need help with this physics question
The table shows the mass of and acceleration due to gravity for several
planets in the solar system. If air resistance is ignored, on which planet would
a space probe with a mass of 250 kg have the highest speed after falling 25
m?
Planet
Mass, 1024 kg
Acceleration due to gravity
Venus
4.87
8.9
Earth
5.97
9.8
Uranus
86.8
8.7
Saturn
568
9
A Earth
B. Saturn
C. Uranus
D. Venus
C. Uranus
What is acceleration due to gravity?Acceleration due to gravity is the acceleration gained by an object due to gravitational force.
Its SI unit is m/s2. It has both magnitude and direction.
According to the question,
Planet would a space probe with a mass of 250Kg
Distance is 25m.
As
Mass does not affect the speed of falling objects, As there is only gravity acting on it.
The mass of Uranus is:
m=8.681×10²⁵kg
The radius of Uranus is: r = 2.556 \times
Hence , Uranus is the answer
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Answer: Uranus 8.7
Explanation:
Because mass does not effect the velocity of a falling object, only gravity effects it and time. The equation is change in Velocity= 9.8m/s^2 times t (for time). So, ignore the mass and choose the lowest acceleration in the chart if your question asks you for the lowest speed.
How do we detect the cosmic microwave background radiation?
looking at the velocity vs time graph, between points b and c on the graph, the object was
1. at rest
2. decelerating
3.accelerating
4. going a constant velocity
If there is no electric current in a coil of wire with a permanent magnet at its
center, which statement must be true?
A. The wire is not moving relative to the magnet.
B. The coil of wire is shorter than the magnet.
C. The coil of wire is longer than the magnet.
D. The wire is moving relative to the magnet.
D. With respect to the magnet, the wire is in motion.
What'd happen if a magnet was inserted and removed from a copper wire coil?An electrical discharge is created when a wire loop as well as a bar magnetic are moved in tandem.This current is generated as a result of a change in the field's intensity near the coil.Both the system is a process and the induced emf that creates it are induced phenomena.
What is required to create an electric current in a magnet enclosed in a loop of wire?The electrons inside the wire are pushed when a magnet is moved around it or when a coil of wire is moved around a magnet, producing an electrical current.
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The speed required of a military jet when taking off from the deck of an aircraft carrier is dependent upon the speed of the carrier and the speed of the wind into which the carrier is moving. The takeoff speed required of a military jet relative to the deck of the carrier is 45 m/s. Determine the acceleration which a military jet must have to take off from the 126-m long runway of the USS Ronald Reagan aircraft carrier.
9514 1404 393
Answer:
8.04 m/s²
Explanation:
A suitable formula is ...
v² = 2ad
a = v²/(2d) = (45 m/s)²/(2(126 m))
a ≈ 8.04 m/s²
The acceleration is about 8.04 m/s².
Which statement best compares potential and kinetic energy?
A. Objects always have more potential energy than kinetic energy.
B. Only kinetic energy increases when the velocity of an object increases.
C. Only potential energy decreases when an object's height increases.
D. Objects always have more kinetic energy than potential energy.
Answer:
D
Explanation:
Because kinetic energy do have more than potential energy: kinetic energy is when a object is moving. Potential energy is when something is at rest and has no movement what so ever
Answer:
B. only kinetic energy increases when the velocity of an object increases.
Explanation:
got it right on the quiz, hope this helps!! :)
what is the iv and the DV in a rocket
an independent variable (IV) that you can change. • Typical IV's might be number of fins, length of rocket, type of material, mass of the rocket. • Choose one dependent variable (DV) and make three launches per DV for each IV for a total of. six launches..
Explanation:
An engineer in a locomotive sees a car stuck on the track at a railroad crossing in front of the train. When the engineer first sees the car, the locomotive is 260 m from the crossing and its speed is 26 m/s. If the engineer's reaction time is 0.51 s, what should be the magnitude of the minimum deceleration to avoid an accident? Answer in units of m/s 2
Answer:
The right answer is "1.369 m/s²".
Explanation:
The given values are:
Distance (s)
= 260 m
Initial speed (u)
= 26 m/s
Reaction time (t')
= 0.51 s
During reaction time, the distance travelled by locomotive will be:
⇒ [tex]s'=ut'[/tex]
[tex]=26\times 0.51[/tex]
[tex]=13.26 \ m[/tex]
Remained distance between locomotive and car:
⇒ [tex]x=s-s'[/tex]
[tex]=260-13.26[/tex]
[tex]=246.74 \ m[/tex]
Now,
The final velocity to avoid collection is, V = 0 m/s
From third equation of motion:
⇒ [tex]V^2=u^2+2ax[/tex]
On putting the estimated values, we get
⇒ [tex]0=(26)^2+2\times a\times 246.74[/tex]
⇒ [tex]0=676+493.48a[/tex]
⇒ [tex]493.48a=-676[/tex]
⇒ [tex]a=-\frac{676}{493.48}[/tex]
⇒ [tex]a=1.369 \ m/s^2[/tex]
plzz help it for my civics class which answer is it?????????????
Answer:
Bill of rights is the correct answer
A crate is sliding down an inclined ramp at a constant speed of 0.55 m/s. The vector sum of all the forces acting on this crate must point down the ramp. True or false?
Answer:
False
Explanation:
Given: A crate is sliding down an inclined ramp at a constant speed of 0.55 m/s.
To find: whether the given statement is true or false
Solution:
As a crate is sliding down an inclined ramp at a constant speed of 0.55 m/s, net force is equal to 0 and so, the vector sum of all the forces acting on the crate can't point anywhere.
So, the given statement is false.
All indicate that the universe is
A) rotating.
B) expanding.
C) shrinking.
D) at equilibrium.
Answer:
if its talking about earth then rotate I'll say
Answer:
universe is expanding
Main Street is approximately 0.25 miles long, How many yards long is Main Street if I mile is
equal to 1760 yards?
Answer:
440
Explanation:
1 mile =1760 yards
0.25 miles =?
[tex] \frac{0.25 \times 1760}{1} [/tex]
=440 yards
What is the density of a 150cm 3 block with a mass of 700 grams?
Answer:
The Density of the block is 4.667g/mL
Explanation:
Given the following data;
Mass of block = 700g
Volume of block = 150cm³
Density = ?
Density can be defined as mass all over the volume of an object.
Simply stated, density is mass per unit volume of an object.
Mathematically, density is given by the equation;
[tex]Density = \frac{mass}{volume}[/tex]
Substituting into the equation, we have;
[tex]Density = \frac{700}{150}[/tex]
Density = 4.667g/mL
A car accelerates from rest to 37.3 m/s
in 7 sec. What is the acceleration?
Answer:
poopgshshsh
Explanation:
cacawusususu
What is necessary for a metallic bond to form?
The atoms should be in close proximity.
The atoms should be far apart.
The electrons must be attracted to each other.
The nuclei must contain neutrons.
Answer:
It is B The atoms should be far apart.
Explanation:
I did Ed test :)
Answer:
The answer is B, The atoms should be far apart
Also i think that they both needed to be metals as well, but that is not included
Explanation:
Kim sees a dog jump onto the road. Her response time before she hits the brakes is 0.3 seconds. How far will her car travel during her response time if she is moving at 20 m/s?
Answer:
6 seconds i think
Explanation:
A bicyclist is initially traveling at 3 m/s. The bicyclist accelerates at 1 m/s2 for 5 seconds.
a. What is the bicyclist’s final velocity?
b. What is the distance traveled?
(Whoever answers first will be marked the brainliest)
An independent variable is ______________________and is plotted on the ______ axis
A dependent variable is ________________________ and is plotted on the ______ axis.
Answer:
The independent variable is plotted on the abscissa (also called the x-axis or horizontal axis), while the dependent variable is plotted on the ordinate (also called the y-axis or vertical axis). The dependent variable is the one whose value changes as a result of changes in the independent variable.
Explanation:
Condensation raises the temperature of the vapor (True or False).
Answer:
true
Explanation:
Some students in a Chemistry lab conducted an investigation in which they added four different solid substances to separate beakers of water. They stirred the mixtures for one minute and then recorded their observations in the table below.
Which most likely caused a new substance to be formed when mixed with water?
A. Substance 1
B. Substance 2
C. Substance 3
D. Substance 4