Answer:
2400 km
Explanation:
30km for 1hr
Need up to 80 hrs , multiply both 80 and 30
So its 2400km
If a scientist is designing a device to create high energy electromagnetic waves, which type of wave would the device most likely create?
А
microwaves
B
infrared waves
с
ultraviolet waves
D
gamma ray waves
HELP!
Which of the following is true about having too little body fat?
Too little body fat can help increase your metabolism
Too little body fat is a health risk
Too little body fat can cause a heart attack
Too little body fat is good for your overall health
Which of the following is a Myth about fat loss?
Most people who are high in body fat eat too much
Any exercise that burns calories will cause the body's general fat deposit to decrease
You can lose body fat over time with regular physical activity if your calorie intake is less than calories burned in a given day
You can spot-reduce by exercising a specific body part to lose fat in that area
Which of the following statements is true about Metabolism?
Your metabolism speeds up naturally as you get older
Your basal metabolism is the amount of energy (calories) your body uses just to keep you living.
You can never speed up or slow down your body's metabolism
Your metabolism is not affected your heredity, age, and maturation
Answer:
too little body fat is a health risk
Explanation:
IF you do not have enough body fat you can have bad things happen to you
Which describes the innermost layer of Earth?
Answer and Explanation:Option A->The innermost layer of the earth is known as the core. It is divided into inner core and outer core. It comprises of a high concentration of nickel and iron.
Which of the following is true about the diameter of a circle?
A. The diameter is twice the length of the radius.
B. The diameter is twice the length of the circumference.
C. The diameter is half the length of the circumference.
D. The diameter is half the length of the radius.
Answer:
option A
Explanation:
the diameter is twice the length of the radius
hope it helps
The frequency of a sound wave is 457 Hz. What is the period?
a
0.0032 s
b 0.078 s
C 0.0010 s
d 0.0022 s
The period of the sound wave having frequency of 457Hz is 0.0022 s.
What is frequency?
The frequency refers to the number of waves that pass a fixed point in unit time.
What is the relation between frequency and time period?
Time period is equal to the reciprocal of frequency.
i.e. T = 1 / f
So, The period of the sound wave having frequency of 457Hz will be
T = 1/457
∴ T = 0.002188 s
Now , rounding to the nearest value we get , 0.0022 s
Thus , The period of the sound wave having frequency of 457Hz is 0.0022 s.
Learn more about frequency here -
https://brainly.com/question/254161
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You plan to visit a friend who lives 30 miles away. You predict that your average speed for this trip will be 50 miles per hour. How long will your trip take?
0.4 hours (24 centimeters)
0.8 hours (48 centimeters)
0.6 hours (36 minutes)
1.66 hours (~100 minutes)
Answer:
.6 hours
Explanation:
to find time you divide distance by speed
When solar energy is converted to thermal energy, how is the thermal energy used? Check all that apply.
to provide air conditioning
to cool refrigerators
to heat spaces in buildings
to heat water
Answer:
to heat spaces in buildingss
Explanation:
what color of colors of light does red glass absorb
What is one of Kepler's laws of planetary motion?
a.Planets move on elliptical orbits with the Sun at one focus.
b.Gravitational force between two objects decreases as the distance is squared.
c.An object in motion remains in motion.
d.Inner planets orbit in the opposite direction of outer ones.
Answer:
a. Planets move on elliptical orbits with the Sun at one focus.
Explanation:
Johannes Kepler was an astronomer who discovered that planets had elliptical orbits in the early 1600s (between 1609 and 1619).
The three (3) laws published by Kepler include;
I. The first law of planetary motion by Kepler states that, all the planets move in elliptical orbits around the Sun at a focus.
II. According to Kepler's second law of planetary motion, the speed of a planet is greatest when it is closest to the Sun.
Thus, the nearer (closer) a planet is to the Sun, the stronger would be the gravitational pull of the sun on the planet and consequently, the faster is the speed of the planet in terms motion.
III. The square of any planetary body's orbital period (P) is directly proportional to the cube of its orbit's semi-major axis.
Hence, one of Kepler's laws of planetary motion states that planets move on elliptical orbits with the Sun at one focus. This is his first law of planetary motion.
Answer:
Planets move on elliptical orbits with the Sun at one focus.
Explanation:
Plato/Edmentum
How much force would it would be required to stop a 950kg car traveling at 30 M/S in 1.5 seconds
Answer:
28500
Explanation:
Force equation - F = m * a
F = 950 * 30
F = 28500
A ball is thrown with an initial velocity of u=(10i +15j) m/s. Whan it reaches the top of it trajectory neglecting air resistance . What is its valocity ?What is acceleration ?
Answer:
v = (10 i ^ + 0j ^) m / s, a = (0i ^ - 9.8 j ^) m / s²
Explanation:
This is a missile throwing exercise.
On the x axis there is no acceleration so the velocity on the x axis is constant
v₀ₓ = 10 m / s
On the y-axis velocity is affected by the acceleration of gravity, let's use the equation
v_y = [tex]v_{oy}[/tex] - g t
[tex]v_{y}^2 = v_{oy}^2 - 2 g (y - y_o)[/tex]
at the highest point of the trajectory the vertical speed must be zero
v_y = 0
therefore the velocity of the body is
v = (10 i ^ + 0j ^) m / s
the acceleration is
a = (0 i ^ - g j⁾
a = (0i ^ - 9.8 j ^) m / s²
PLS HELP ME FAST I NEED TO DO IT NOW
I WILL GIVE YOU 45 POINT
Answer:
A) so the conditions for the expirament don’t affect the outcome
b) to make sure the results are conclusive and accurate
Explanation:
A 150-newton force, applied to a wooden crate at an angle of 30° above the horizontal, causes the crate to travel at constant velocity across a horizontal wooden floor.
1. Calculate the magnitude of the normal force exerted by the floor on the crate. [Show all work, including the equation and substitution with units.]=
The mechanical equilibrium condition allows to find the value of the normal for the body is:
The normal is: N = 23 NEquilibrium equation.Newton's second law establishes a relationship between the force, the mass and the acceleration of bodies, in the special case that the acceleration is zero, it is called a mechanical equilibrium condition.
∑ F = 0
A free body diagram is a diagram of the forces without the details of the bodies, in the attachment we can see this diagram, let's write the equilibrium condition for each axis.
x- axis
Fₓ -fr = 0
y-axis
F_y + N – W =0
Let's use trigonometry to find the components of the applied force.
Cos 30= [tex]\frac{F_x}{F} [/tex]
sin 30 = [tex]\frac{F_y}{F } [/tex]
Fₓ = F cos 30
[tex]F_y[/tex] = F sin 30
The weight of a body is the mass times the acceleration due to gravity.
W = m g
Let's substitute.
F sin 30 + N – m g = 0
N= m g – F sin 30
Let's calculate.
N = m 9.8 – 150 sin 30
N = m 9.8 - 75
To finish the calculation, the mass of the body must be known, suppose a value of 10 kg.
N=10 9.8 -75
N = 23N
In conclusion using the mechanical equilibrium condition we can find the value of the normal for the body is:
The normal is N = 23 NLearn more about the mechanical equilibrium condition here: brainly.com/question/12804448
a race car driving around the road is unbalanced or balanced?
Answer:
balenced
Explanation:
Distance = speed x time
80 POINTS, BRAINLIEST, AND QUESTION IS MULTIPLE CHOICE!!! (please answer quickly)
question:
If all matter has a gravitational force, why don’t two tennis balls on the ground move towards each other on their own?
A. The force of gravity from the tennis balls is too small.
B.The tennis balls are outside of each other’s gravity field.
C.The tennis balls are too small to produce any gravity.
D.There is too much friction between the balls and the ground
(the picture is just of the question)
Answer:
Since gravitational force is inversely proportional to the square of the separation distance between the two interacting objects, more separation distance will result in weaker gravitational forces. So as two objects are separated from each other, the force of gravitational attraction between them also decreases.
When dealing with the force of gravity between two objects, there are only two things that are important – mass, and distance. The force of gravity depends directly upon the masses of the two objects, and inversely on the square of the distance between them.
Explanation:
I could be wrong but I would say B :)
Have a good day!
answer:
i believe the answer is d
explanation:
here's why;
c. is incorrect because everything has a gravitational force.
a. is also incorrect because gravity is what holds the tennis ball down and keeps it on the ground.
i don't really know how to explain why b. is wrong, but d. is the correct answer because the force of friction opposes the motion of an object, causing moving objects to lose energy and slow down.
good luck :)
i hope this helps
**please let me know if this was incorrect**
have a great day !!
On which of the following does upthrust Force depend?
*density of the object
*type of the liquid
*mass of the object
* volume of the immersed part of the object
* gravitational pull of Earth
Answer:
density of the object
volume of the immersed part of the object
An object moves from point A to point B to point C, then back to point B and then to point C along the line
Answer:
Rectilinear propagation of light
Which is a TRUE statement about a series circuit
A. the charge has only one path through which it can flow.
B. The current through the circuit can take several paths
C. every part of the circuit is negatively charged
sistanc
ed to as
D. every part of the circuit is positively charged
Please answer this I have 20 minutes to finish this test
Answer:
A the charge has only one path through which it can flow.
The vapor pressure of a liquid is a measure of how much vapor of a liquid sits in the air above the liquid in a closed container. So, for example, a steam room has a very high vapor pressure of water. Do you think a substance that has weaker forces between molecules would in general have a greater or lesser vapor pressure than a substance with stronger forces between the molecules? For example, compare isopropyl alcohol and water.
Answer: When the isopropyl alcohol was boiled, it quickly boiled away. The water ALSO boiled away, but the alcohol was quicker. Isopropyl alcohol had a high vapor pressure because it boiled away very fast, and isopropyl alcohol had strong forces between its molecules (seen with the surface tension experiment.) The water boiled away slower, and had weaker forces between its molecules. So, the stronger the forces, the higher the vapor pressure
Explanation:
A what is a chemical secreted by your glands that regulates the activities of different body cells.
The chemical secreted by glands that regulates the activities of different body cells is HORMONE.
1. If you add air to a flat tire through a single small entry hole, why does the air spread out to fill the tire?
Answer:
The tire fills up just like anything else that holds air when u pump a ball or tire up it fills all the way up cause it is a small confined space and after filling it with air the atoms of the air fill the tire up
Explanation:
PLS ANSWERR THIS QUESTION FOR ME !!
Explanation:
20 joule is your answer
Answer:
here
mass m =100kg
distance d=50m
acceleration due to gravity a =10m/s²
work =force×displacement
= ma/d=100×10/50=20joule
Alkaline earth metals have a low density
true
false
true
Explanation:
this is because melting point and boiling point decreases down the group because they are held together by attractions between positive nuclei and delocalised electrons
Which of the following is considered to be a fine motor skill?
Jumping rope
Drawing
Running
Riding bicycle
How do mountains affect the climate of a region?
Which action will increase the gravitational force between two objects?
A. Moving the objects farther apart
B. Removing some mass from one of the objects
C. Removing half of each object
D. Moving the objects closer together
Answer:
D. Moving the objects closer together
Explanation:
A.P.E.X.
took the quiz
A pull back toy car accelerates for 1.8 seconds and covers 4 m while speeding up after being released from rest.
Answer:
Acceleration, a = 2.47 seconds
Explanation:
Given the following data;
Time, t = 1.8 seconds
Distance = 4 meters
Initial velocity = 0 m/s (since it's starting from rest)
To find the acceleration of the toy car, we would use the second equation of motion;
[tex] S = ut + \frac {1}{2}at^{2}[/tex]
Where;
S represents the displacement or height measured in meters.
u represents the initial velocity measured in meters per seconds.
t represents the time measured in seconds.
a represents acceleration measured in meters per seconds square.
Substituting into the equation, we have;
Substituting into the formula, we have;
[tex] 4 = 0(1.8) + \frac {1}{2}*a*(1.8)^{2}[/tex]
[tex] 4 = 0 + \frac {1}{2}*a*3.24[/tex]
[tex] 4 = \frac {1}{2}*a*3.24[/tex]
Cross multiplying, we have;
[tex] 8 = 3.24a[/tex]
[tex] a = \frac {8}{3.24}[/tex]
Acceleration, a = 2.47 seconds
How does a physicist define work? a force applied for a certain length of time a force applied over a distance power applied for a certain length of time power applied to something over a distance
Answer:
Work, in physics, measure of energy transfer that occurs when an object is moved over a distance by an external force at least part of which is applied in the direction of the displacement. ... To express this concept mathematically, the work W is equal to the force f times the distance d, or W = fd.
Explanation:
Definition of work in physics
A measure of energy expended in moving an object; most commonly, force times distance is work.Which produces more energy? Nuclear fission or nuclear fission?
Answer:
Nuclear fission
Explanation:
your so very welcome