What are the SI units for distance and time?

Answers

Answer 1

Answer:

distance is meters, time is seconds

Answer 2

Answer:

distance is meters(m)

time is seconds (s)

Explanation:


Related Questions

4. Why do chemists use relative masses of atoms compared to a reference isotope rather than the
actual masses of the atoms?
a. The actual mass of an electron is very large compared to the actual mass of a proton.
b. The actual masses of atoms are very small and difficult to work with.
c. The number of subatomic particles in atoms of different elements varies.
d. The actual masses of protons, electrons, and neutrons are not known.

Answers

Answer:

B

Explanation:

Answer:

answer is B

Explanation:

took the test

Problem #2: An apple is thrown upward with an initial velocity of +24.0 m/s. a. Sketch the apple's trip and label what you know. b. How high will the apple go? (Ans: +29.4 m) c. What is the total time needed for the apple to return to its original position? (Ans: 4.90 s)

Answers

Answer:

The answer is below

Explanation:

a) The initial velocity (u) = 24 m/s

We can solve this problem using the formula:

v² = u² - 2gh

where v = final velocity, g= acceleration due to gravity = 9.8 m/s², h = height.

At maximum height, the final velocity = 0 m/s

v² = u² - 2gh

0² = 24² - 2(9.8)h

2(9.8)h = 24²

2(9.8)h = 576

19.6h = 576

h = 29.4 m

b) The time taken to reach the maximum height is given as:

v = u - gt

0 = 24 - 9.8t

9.8t = 24

t = 2.45 s

The total time needed for the apple to return to its original position = 2t = 2 * 2.45 = 4.9 s

Cody’s car accelerates from 0M/S 245 in/at Northwoods and 15 seconds what is the acceleration of the car

Answers

Answer:

3m/s^2

Explanation:

Acceleration is change in velocity / time = 45/15 = 3m/s^2

a pulling force carried by a rope is called what

Answers

Answer:

The pulling force that acts along a stretched flexible connector, such as a rope or cable, is called tension, T. When a rope supports the weight of an object that is at rest, the tension in the rope is equal to the weight of the object: T = mg.

Explanation:

What charge does Chlorine have after bonding with magnesium

Answers

Answer:

A magnesium atom will lose 2 electrons to form a stable 2+ ion. Chlorine is in group 7 of the periodic table. A chlorine atom will gain 1 electron to form a stable 1- ion.

Explanation:

A jet airliner moving initially at 538 mph (with respect to the ground) to the east moves into a region where the wind is blowing at 937 mph in a direction 23 degrees north of east. What is the new speed of the aircraft with respect to the ground. Answer in units of mph

Answers

Answer:

The speed is "1447.576 mph".

Explanation:

The given values are:

Direction (north to east)

= 23°

Wind's speed

= 937 mph

Jet moving at a speed

= 538 mph

Now,

The velocity of jet airliner with respect to the ground will be:

⇒ [tex]v=v_{1}+v_{2}[/tex]

⇒ [tex]v=\sqrt{(538)^2+(987)^2+2(538)(937)\times Cos23^{\circ}}[/tex]

⇒    [tex]=1447.576 \ mph[/tex]

A cyclist rides at a velocity if 12m/s.if the cyclist deceleates a rate of 1.5m/s.how long will take her to reach a velocity of 3m/s?
1)identify your variables -what is what ?
2)pick your equation
3)plug in and solve

Answers

Answer:

t=6s

Explanation:

v=3m/s

u=12m/s

a=-1.5ms-²

t=?

v=u+at

3=12+(-1.5)t

3-12=-1.5t

t=3-12/-1.5

t=6s

I am not sure if me is correct.

The maximum tension that a 0.80 m string can tolerate is 15 N. A 0.35-kg ball attached to this string is being whirled in a vertical circle. What is the maximum speed the ball can have at the top of the circle? 3.74 m/s 9.67 m/s 5.86 m/s None of the above

Answers

Answer:

v=5.86 m/s

Explanation:

Given that,

Length of the string, l = 0.8 m

Maximum tension tolerated by the string, F = 15 N

Mass of the ball, m = 0.35 kg

We need to find the maximum speed the ball can have at the top of the circle. The ball is moving under the action of the centripetal force. The length of the string will be the radius of the circular path. The centripetal force is given by the relation as follows :

[tex]F=\dfrac{mv^2}{r}[/tex]

v is the maximum speed

[tex]v=\sqrt{\dfrac{Fr}{m}} \\\\v=\sqrt{\dfrac{15\times 0.8}{0.35}} \\\\v=5.86\ m/s[/tex]

Hence, the maximum speed of the ball is 5.86 m/s.

what would a boats velocity be if it would go 15kph and 18 kph?

Answers

Answer:

It depends

Explanation:

why can't you run from momentum ?

Answers

Two kids walk through the woods discussing momentum. I mean, who wouldn’t?
Okay, fine. It’s a basic introduction to the concept of momentum.

state the various use of a periscope​

Answers

Answer:

the periscope is an instrument for observation over, around or through the object, obstacle or condition that prevents direct line-of-sight observation from the observer's current position.

Explanation:

the periscope is used to monitor the dangerous chemical reactions in the laboratory and they are used in observing the nuclear.

Answer:

A periscope is used to see objects over the heads of a crowd.It is used by soldiers sitting in a bunker to observe and view the opponents' activities over the ground.It is used by a navy officer sitting in a submarine to see ships over the surface of the water in the sea.It is also useful in submarines to determine the distance of the torpedo and decide the right time for an attack.

A car is traveling 30m/s and slams on the breaks, coming to a complete stop in 5 seconds.
Calculate its acceleration (assuming it was constant). Draw a graph of x-t, v-t and a-t.

Answers

Answer:

-6

Explanation:

a=vf-vi/t

vf=0

so that we you subtract vf to vi it will be -30/5=-6

On the Moon, astronauts can “bounce” from location to location, but on Earth they cannot move in this way. What physical property changes based on the gravitational force of a planet or moon?

Answers

The physical property that changes is the astronauts “weight” because of the different gravitational force of the moon.

HEY CAN ANYONE PLS ANSWER DIS IN YOUR OWN WORDS!!!

Answers

Answer:

11. A small number of alpha particles being deflected at large angles suggested that there is a concentration of positive charge in the atom

12. describes properties of the atom

13. 1913

14. quantum state with all observable (atoms) independent of time.

15. the lowest energy state of an atom or other particle

Explanation:

draw a diagram of a seismometer showing how the movement of earth is lated into a siesmogram​

Answers

I’ll explain this to you draw a diagram of seismometer show how the earth moves it’s round and it moves on it axis and spins fully which takes it a year 365 days

idk but it seems hard.

How are the frequencies of the color (visible light) spectrum similar to the Electromagnetic spectrum?

Answers

Answer:

[tex]this \: is \: due \: to \: both \: spectrum \: having \\ \: the \: same \: or \: almost \: the \: same \: wave \: speed.[/tex]

You row a boat perpendicular to the shore of a river that flows at 3 m/s. The velocity of your boat is 4 m/s relative to the water. What is the velocity of your boat relative to the shore?

Answers

Answer:

The velocity vBW of the boat relative to the water is 4.0 m/s, directed perpendicular to the current, as in Figure 3.18.

Explanation:

The boat is perpendicular to the shore. Then the net velocity of the boat with respect to river is 5 m/s. The observer feels like the boat is moving slower than they appear actually.

What is relative velocity ?

Relative velocity is velocity of an object measured with respect to other object which can be of stationary or moving with a speed. Thus speed relative to another object is called the relative velocity.

The relative velocity is what's the speed for an observer but it differs from actual velocity. Sometimes it may slower or faster depending on the object with which a we are relating the speed.

Given that the speed of the boat = 4 m/s

speed of river = 3 m/s.

Both are perpendicular and the net velocity of the boat is :

r = √(3² + 4²) = 5 m/s.

Hence, the velocity of the boat relative to the shore will be 5 m/s.

Find more on relative velocity :

https://brainly.com/question/29655726

#SPJ2

4. Which type of compound is sugar?

Answers

Sugar is a carbohydrate

Why does an object slow down when going uphill
Please explain properly

Answers

Answer:

The change in speed on slopes is due to gravity. When going downhill, objects will accelerate (go faster), and when going uphill they will decelerate (slow down). On a flat surface, assuming that there is little friction, they will then maintain a constant speed.

Mark me as BRAINLIEST if this answer helped you!

According to Newton’s First Law of Motion, what will happen to a baseball thrown in outer space

Answers

Answer:

The baseball will stay in motion until another force act upon it.

Explanation:

Answer:

Newton's First Law of Motion is that an object in motion will stay in motion unless acted upon by an outside force. Due to the lack of gravity in space, until a different outside force acts upon the object, the baseball will continue to move at a constant speed in the same direction for all time (until acted upon by something else).

what is one second time ?​

Answers

Answer:

one second is defined au1/86400th the part of a solar day

POSSIBLE POINTS: 5
A student throws a ball upward with a force of 50.0 Newtons. The ball reaches a maximum height of 15.0 meters in 2 seconds and then returns back to
his hands. What is the direction of the acceleration at the top?
There is no acceleration at the top
O The acceleration is directed upwards away from the Earth
O The acceleration is directed downwards towards the Earth
O None of the above

Answers

Answer:

A

Explanation:

Given that a student throws a ball upward with a force of 50.0 Newtons. The ball reaches a maximum height of 15.0 meters in 2 seconds and then returns back to

his hands. 

At maximum height which is the top, the velocity is equal to zero.

According to definition of acceleration, which says; the rate of change of velocity.

Since velocity equal zero, acceleration also will be equal to zero.

Therefore, there is no acceleration at the top.

Which of the following is NOT an undefined term?
A. Line
B. Point
C. Line Segment
D. Plane

Answers

C - line segment im not sure but im guessing that's the answer if that's helps.

find weight of 45 kg at height 800 km from earth's surface?​

Answers

Answer:

The weight is 348.4 N

Explanation:

Effect of the Altitude on the Acceleration of Gravity

The effect of gravity decreases with altitude because greater altitudes mean greater distances from the Earth's center.

The practical formula to calculate the gravity as a function of the altitude h is:

[tex]{\displaystyle g_{h}=g_{0}\left({\frac {R_{\mathrm {e} }}{R_{\mathrm {e} }+h}}\right)^{2}}[/tex]

Where go is the conventional gravitational acceleration = [tex]9.80665\ m/s^2[/tex]

R is the Earth's mean radius at the equator = 6,378 Km

h is the altitude.

At a height of h=800 Km, the acceleration of gravity is:

[tex]{\displaystyle g_{h}=9.80665 m/s^2\left(\frac {6,378 Km }{6,378 Km+800Km}}\right)^{2}}[/tex]

Calculating:

[tex]g_h=7.74\ m/s^2[/tex]

The weight is the product of the acceleration of gravity by the mass of the object, thus:

[tex]W=45\ Kg\cdot 7.74\ m/s^2=348.4\ N[/tex]

The weight is 348.4 N

explain the relationship between physics and biology​

Answers

Answer:

Biology is the study of living organisms. Physics is the study of matter and the laws of nature to understand the behavior of matter and the universe.

The answer above is correct my dude

What is the weight of a body at a centre of Earth​

Answers

The weight of a body placed at centre of Earth is 0. Because the mass at the exact cenrte of the earth is zero.
the weight of the earth is 0

How long will it take to travel 150 km traveling at 50 km/hr?

Answers

Answer: 3 hours

Explanation: 150 km / 50 km = 3 hrs.

true for false; "Acceleration is inversely proportional to mass."

Answers

Answer:

True

Explanation:

F = ma

We can rearrange to a = F/m

So if we increase a and F is constant, then m has to decrease because it is in the denominator.

pls help asap pls explain. Just before opening her parachute a skydiver having a mass of 50 kg reaches terminal velocity. Calculate the force of air resistance if the buoyant force is 20 N. Be careful! Use the skydiver’s mass to calculate his/her Fg (force of gravity).

Answers

Answer:

490N

Explanation:

Given that,

Mass of a skydiver, m = 50 kg

Buoyant force = 20 N

When the skydiver reaches the terminal velocity, net force on her is equal to 0. So, air drag is equal to the weight of the skydiver.

D = mg

Putting all the values,

D = 50 × 9.8

D = 490 N

So, the force of air resistance is 490 N.

difference between simple machine and complex machine?​

Answers

Answer:

a simple machine has way less parts than a complex machine like just one pulley or lever. A complex machine has multiple different parts that lead up to one thing being done in the long run.

Explanation:

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