State whether the following are true or false.
1. Sun dial and sand clock were used in ancient time. ______
2. Cubit, handspan and foot span are standard units of measurement. ______
3. Pendulum clock repeats its motion at equal intervals of time. ______
4. In digital clocks, mechanical vibrations are converted into digital electronic signals. ______
5. Sundials can also be used on rainy days.

Answers

Answer 1

Answer:

Explanation:

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Related Questions

5. Fill in the blanks with either "More," "Less," or "The Same."
a) If an object has more mass than another object, it will accelerate_____
b) In order to accelerate an object more, one would need to apply_____ force.
c) If an equal force is applied to two different objects, the less massive object will accelerate____

Answers

Answer:

Explanation:

5. Fill in the blanks with either "More," "Less," or "The Same."

a) If an object has more mass than another object, it will accelerate_less____

b) In order to accelerate an object more, one would need to apply_more____ force.

c) If an equal force is applied to two different objects, the less massive object will accelerate_more___

The answer is less, more and more.

Relationship between mass and acceleration

If an object has more mass than another object, it will accelerate less. In order to accelerate an object more, one would need to apply more force. If an equal force is applied to two different objects, the less mass of an object will accelerate more

The acceleration of an object depends directly on the force acting upon the object, and inversely on the mass of the object.

Learn more about force here: https://brainly.com/question/12970081

10. Which country creates the most waste per person? (1 point)
O Germany
O Sweden
United States
O United Kingdom
Finish Cancel

Answers

Answer:

United states creates the most waste per person

Hai điện tích q1 = 8*10^-8C, q2 = -8*10^-8C đặt tại A,B trong không khí, AB=4cm. Xác định cường độ điện trường tại C với:
a) CA = CB = 2cm
b) CA= 8cm, CB = 4cm
c) CA = CB = 4cm
d) CA = 3cm, CB = 5cm

Answers

Answer:

its b cuz ca when u add the b its a Explanation:

4. You bought a block of cheddar from the grocery store. If you cut a small piece and a large piece from the same block of cheese, will they have the same density? Why?

Answers

yes, as density is a value which is the same for any substance and does not change due to different volumes or masses of the same substance

Why aren't pads or helmets necessary in flag football?​

Answers

Answer:

because it is not nesscery

Explanation:

Question:
the distance of the car can move by velocity 15 m/s for time 5s is :
Physics

Answers

Answer:

c) 2.05

Explanation:

A girl attempts to swim directly across a stream 15meters wide. When she reaches the other side, she is15 meters downstream. The magnitude of herdisplacement is closest to

Answers

x
=

15
2
+
15
2

x
=
15

2
QED.

What affects the vertical (y-component) of a projectile?
A. Gravity
B. Air resistance
C. Velocity
D. Speed

Answers

a. the force of gravity

Answer:

Gravity

EXPLANATION:

In the vertical or y direction, however, the projectile experiences the effect of gravity. As a result, the y component of the velocity  is not constant, but changes. The y component of the acceleration ay is the downward acceleration due to gravity.

PLS MARK BRAINLIEST

Which has the lowest coefficient of friction?


cast iron on cast iron

glass on glass

nonstick coating on steel

steel on steel with castor oil

Answers

Answer: nonstick coating on steel

Explanation:

If you place a force of 10 N on a box and accelerate at 1.2 m/s squared what is the mass of the box?

Answers

Answer:

8.33 kg

Explanation:

The mass of the box can be found by using the formula

[tex]m = \frac{f}{a} \\ [/tex]

f is the force

a is the acceleration

From the question we have

[tex]m = \frac{10}{1.2} = 8.333... \\ [/tex]

We have the final answer as

8.33 kg

Hope this helps you

how to find the density of air?

Answers

You have to divide the pressure exerted by the air into two partial pressures: of the dry air and of the water vapor. Combining these two values gives you the parameter.

9. What is NOT true about the Body Composition Assessment?
It can be measured using skin calipers, a water test, and body composition scales.
OBMI is an indirect body composition measuring method using your weight and height.
ОО
Your weight alone can determine the percentages of your body's composition.
OBMI can be a reliable indicator of body composition.

Answers

Answer: Your weight alone can determine the percentages of your body's composition

Explanation:

C. Your weight alone can determine the percentages of your body's composition.

What is Body Composition Assessment?

Body composition analysis is the assessment of the proportion of fat to fat-free mass in your body.

Performing Body Composition Assessment will tell you your own body's unique makeup and help you identify areas to work on to improve your overall health and wellness.

Thus, the statement that is NOT true about the Body Composition Assessment is your weight alone can determine the percentages of your body's composition.

Learn more about body composition here: https://brainly.com/question/7285113

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in the international space station which orbits earth, astronauts experience apparent weightlessness because

Answers

Answer:

because there isn't any gravity there

Sound is caused by:


Air

Electricity

Force

Vibrations

Answers

sound is caused by vibrations

Answer:

Vibrations

Explanation:

Sounds are produced by vibrations.

Sound travels as waves, which in turn create other particles to vibrate creating vibrating particles and change sound.

Sound waves are reflected by surfaces.

Pipes that transport water
over long distances
What is pipes that transport water over long distance

Answers

Answer:

Large-diameter pipelines can be used to convey water over large distances, while smaller-diameter pipelines can be used to provide bulk or individual supplies at the point of use. Aqueducts are canals used to bring water from a river or reservoir to a water distribution center.

Explanation:

PLEASE HELP. SO HARD. SCIENCE ASSIGNMENT. ASAP

Answers

World shall know pain im not helping figure it out urself + RATIO

Why is the temperature of a normal healthy old man is less than that of a normal healthy young man?

Answers

Answer:

Normal body temperature does not change much with aging. But as you get older, it becomes harder for your body to control its temperature. A decrease in the amount of fat below the skin makes it harder to stay warm.

Calculate the power of a car that uses 12KJ of chemical energy in 6 seconds

Answers

Explanation:

Power=work done/time

=> 12kJ/6s = 12000J/6s = 2000W = 2kW.

hope this helps you

how is the moon different during a new moon phase than during a lunar eclipse?

Answers

Answer:

because one the moon just resets and the other is a whole other thing

An arrow fired horizontally at 44m/s travels 23m horizontally before it hits the ground From what height was it fired?

Answers

High=1.54m that is the answer your welcome

Newton's 3rd law is.

C. Force = Mass x Acceleration

B. An object in motion will stay in motion unless acted upon

A. For every action there is a reaction

Answers

A because for every action there is an equal and opposite reaction

URGENT: true or false: liquids can be poured from one container to another because there are no attraction forces between atoms or molecules

Answers

Answer:

False

Explanation:

It's common sense  

Answer:

True

Explanation:

Water doesnot have any definite shape.There is less attraction between particles .Hence water can move one container to another

If it takes 5 seconds for the projectile to reach its highest point, what is the total

hang time?

10 sec

1 sec

2 sec

d

8 sec

Answers

10 seconds! There you go

water being turned into ice cubes in a freezer is an example of _____.

Answers

Answer:

an exothermic process and the change in enthalpy, ΔH, will be a negative number

Water is turned into ice cubes in a freezer is an example of an exothermic process.

What is an exothermic process?

An exothermic process can be described as a thermodynamic process or reaction that releases energy from the system to its surroundings, usually in the form of heat, light, or sound.

While an endothermic process is an opposite of an exothermic process where the heat absorbs energy usually in the form of heat. In the physical sciences of chemical reactions, the chemical bond energy is changed into thermal energy (heat).

In exothermic reactions, the heat that is liberated by the reaction occurs the form of the kinetic energy of molecules. The transition of electrons from one energy level to another leads light to being released. This light is equal to the stabilization energy of the energy for chemical reaction.

The freezing of water is an exothermic process as the water becomes solid it releases energy to the surroundings.

Learn more about the exothermic process, here:

https://brainly.com/question/12321421

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PLS HELP HELP WILL MARK FIRST RIGHT ANSWER BRAINLIEST!!!!

Answers

Answers:

2. Displacement is:

A. All answers correctly describe displacement.

3. What is the initial position of this car?

B. 0

4. What is the final position of this car?

C. -2

5. What is the displacement of the car during PART A of the trip?

A. 3

6. What is the displacement of the car during PART B of the trip?

C. -5

7. What is the total distance the car travels during the WHOLE TRIP?

B. 8

8. What is the total displacement the car travels during the WHOLE TRIP?

D. -2

9. What is the change in position (displacement) of the car?

A. 17 meters

10. Define and explain each of the three variables in this displacement equation: Δx = [tex]x_{f} - x_{i}[/tex]

Δx: This is the total value of displacement. xf: This represents the final position.xi: This represents the initial position.HOPE THIS HELPS!

Question 1 (Mandatory) (1 point)
An 8 kg basketball is dropped from a height of 10 m. Calculate the Gravitational
Potential Energy of the ball.
0784 Joules
7,683 Joules
80 Joules
O 0.8 Joules

Answers

Answer:

[tex]P.E=mgh \\ = 8kg \times 9.81m {s}^{ - 2} \times 10m = 784J[/tex]

The force between two point-charges of 0.040 C and 0.060 C separated by certain distance is 2.2 x 10^5 N. what is the distance between the charges?
A. 2.5m
B. 5m
C. 10m
D. 20m

Answers

Answer:

im in hardvard dont cheat and get good grades and become a graduate

it is c

Explanation:

Answer:

10m

Explanation:

A car accelerates from 4 meters/second to 16 meters/second in 4 seconds. The car’s acceleration is meters/second2.

Answers

Answer:

3m/s^2

Explanation:

VF-VI/time

16-4/4

12/4

3

How far could you skip in one hour? 20m/ 3m/s

Answers

Answer:

20m/s = 72,000m, 3m/s = 10800m

Explanation:

5 star please

HELP HOMEWORK IS DUE IN % MINUTES

6. How much time will it take for a bug to travel 5 meters across the floor if it is traveling at 1 m/s?

7. You need to get to class, 200 meters away, and you can only walk in the hallways at about 1.5 m/s. (if you run any faster, you’ll be caught for running). How much time will it take to get to your class?

8. In a competition, an athlete threw a flying disk 139 meters through the air. While in flight, the disk traveled at an average speed of 13.0 m/s. How long did the disk remain in the air?

Answers

Answer:

Answer to number 6 = 5 seconds.

Explanation:

Distance = Speed x Time.

So  

t

=

d

s

t

=

5

1

=

5

So the bug will take 5s.

Answer to number 7 =133.33

Explanation:

here s=200m

v=15m/s

now,s=d/t

then,t=d/s

200÷1.5=133.33s

Answer to number 8 = 10.69 s

t = 139m/13 m/s

This is physics?? If so I must be a genius.
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