1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
trasher [3.6K]
3 years ago
15

Elements have the same number of ______ as you move from left to right

Physics
2 answers:
Fiesta28 [93]3 years ago
8 0

Answer:

protons

Explanation:

viva [34]3 years ago
5 0

Answer:

Electron shells

Explanation:

You might be interested in
Calculate the speed of a car that covers a distance of 108km in 30 mins
Blababa [14]

The speed of the car is 60 m/s

Explanation:

The speed of an object is a scalar quantity telling "how fast" the object is moving, regardless of its direction. It can be calculated as follows:

speed=\frac{d}{t}

where

d is the distance covered

t is the time taken

For the car in this problem, we have

d=108 km =1.08\cdot 10^5 m is the distance covered

t=30 min \cdot 60 =1800 s is the time taken

Subsituting into the equation, we find the speed:

speed=\frac{1.08\cdot 10^5}{1800}=60 m/s

Learn more about speed:

brainly.com/question/8893949

#LearnwithBrainly

5 0
3 years ago
How high does Pete lift his sledge hammer if he used a force of 25N to lift the hammer while doing 50J of work?
sasho [114]

Answer:He lifts 2 meters

Explanation:We are trying to find the distance. The formula for distance is W/Force. 50 is our amount of work. 25N is how much force was used. Divide the work bye the force. 50/25=2M

8 0
3 years ago
A rifle with a weight of 25 N fires a 4.5-g bullet with a speed of 240 m/s. (a) Find the recoil speed of the rifle. m/s (b) If a
asambeis [7]

Answer:

The recoil speed of the man and rifle is v_{man}=0.016 ms^{-1}.

Explanation:

The expression for the force in terms of mg is as follows;

F=mg

Here, m is the mass and acceleration due to gravity.

Rearrange the expression for mass.

m=\frac{F}{g}

Calculate the combined mass of the man and rifle.

m_{man,rifle}=\frac{650+25}{g}

Put g=9.8 ms^{-2}.

m_{man,rifle}=\frac{650+25}{9.8}

m_{man,rifle}=68.88 kg

The expression for the conservation of momentum is as follows as;

m_{man}u_{man}+m_{bullet}u_{bullet}=m_{man}v_{man}+m_{rifle}v_{man,rifle}

Here, m_{man,rifle} is the mass of the man and rifle,  m_{rifle} is the mass of the rifle,u_{man},u{bullet}  are the initial velocities of the man and bullet and v_{man},v{man,rifle} are the final velocities of the man and rifle and rifle.

It is given in the problem that a rifle with a weight of 25 N fires a 4.5-g bullet with a speed of 240 m/s.

Convert mass of rifle from gram to kilogram.

m_{bullet}=4.5 g

m_{bullet}=.0045 kg

Put m_{bullet}=.0045 kg,m_{man,rifle}=68.88 kg , u_{man,rifle}=0, v_{bullet}= 240 ms^{-1} and u_{bullet}=0.

m_{man}(0)+m_{bullet}(0)=(68.88)v_{man,rifle}+(.0045)(240)

0=(68.88)v_{man,rifle}+(.0045)(240)

0=(68.88)v_{man,rifle}+1.08

(68.88)v_{man,rifle}=\frac{-1.08}{68.88}

v_{man,rifle}=-0.016 ms^{-1}  

Therefore, the recoil speed of the man and rifle is v_{man}=0.016 ms^{-1}.

3 0
3 years ago
How can scientists eliminate the chance of error in their investigations
Reil [10]
They can do the experiment more than once and make sure they follow steps right like in a experiment
3 0
3 years ago
why is it important to create pictorial and physical models before trying to solve an equation, solving a physics problem
Romashka [77]
Many fundamental laws of physics and chemistry can be formulated when doing this.
5 0
2 years ago
Read 2 more answers
Other questions:
  • 3. A train has broken through the wall of a train station. During the collision, what can be said about the force exerted by the
    15·1 answer
  • Suppose that you travel to a planet that has 4 times the Earth's mass and 4 times the Earth's radius. Calculate how much more or
    12·1 answer
  • A hiker walks 9.4 miles at an angle of 60° south of west. Find the west and south components of the walk. Round your answers to
    14·1 answer
  • If a ball is thrown straight up into the air, what is its acceleration as it moves upward? What is its acceleration when it reac
    7·2 answers
  • Which of the following is the most likely global climate change?
    7·1 answer
  • If 1.0 joule of work is required to move a charge of 1.0 coulomb between two points is an electric field the potential differenc
    13·1 answer
  • When it is winter in the northern hemisphere we are receiving?
    5·2 answers
  • Introduction: The specific heat capacity of a substance is the amount of energy needed to change the temperature of that substan
    7·1 answer
  • A rack of seven spherical bolwing balls (each 7.00 kg, radius of 9.50 cm) is positioned along a line located a distance =0.850 m
    5·1 answer
  • A 9-kg body has three times the kinetic energy of an 4-kg body. Calculate the ratio of the speeds of these bodies.
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!