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
dem82 [27]
3 years ago
7

A dime is 1.35 mm thick. How many dimes would it take to reach the height of a table that is 32.0 inches tall? (1.00 inches = 2.

54 cm)
Use correct sig figs in your answer.
Physics
1 answer:
ELEN [110]3 years ago
3 0

Answer:

602 dimes

Explanation:

I converted the dimes hight to inches then divided it by 32 getting the amount of dime required to reach that hight

You might be interested in
Look at the map of the United States. Which of the following would be a reasonable estimate for the amount of the U.S. coastline
MaRussiya [10]

Answer:

B

Explanation:

4 0
3 years ago
Read 2 more answers
During a rockslide, a 670 kg rock slides from rest down a hillside that is 740 m along the slope and 240 m high. The coefficient
ElenaW [278]

a) 1.58\cdot 10^6 J

b) 1.15\cdot 10^6 J

c) 0.43\cdot 10^6 J

d) 35.8 m/s

Explanation:

a)

The gravitational potential energy of an object is the energy possessed by the object due to its location with respect to the ground.

It is given by:

U=mgh

where

m is the mass of the object

g is the acceleration due to gravity

h is the height of the object, relative to a reference level

Here, the reference level is taken at the bottom of the hill (where the potential energy is zero).

So, we have:

m = 670 kg is the mass of the rock

g=9.8 m/s^2

h = 240 m is the initial height of the rock

So, the potential energy of the rock just before the slide is

U=(670)(9.8)(240)=1.58\cdot 10^6 J

b)

The energy transferred to thermal energy during the slide is equal to the work done by friction, which is:

W=F_f d

where

F_f is the force of friction

d = 740 m is the displacement of the rock along the ramp

The force of friction is given by:

F_f=-\mu mg cos \theta

where

\mu=0.25 is the coefficient of friction

m = 670 kg is the mass of the rock

\theta is the angle of the ramp

Since we know the lenght of the ramp (d = 740 m) and the height (h = 240 m), we can find the angle:

\theta=sin^{-1}(\frac{h}{d})=sin^{-1}(\frac{240}{740})=18.9^{\circ}

Therefore, the work done by friction is:

W=-\mu m g cos \theta d =-(0.25)(670)(9.8)(cos 18.9^{\circ})(740)=-1.15\cdot 10^6 J

So, the energy transferred to thermal energy is 1.15\cdot 10^6 J.

c)

According to the law of conservation of energy, the kinetic energy of the rock as it reaches the bottom of the hill will be equal to the initial potential energy (at the top) minus the energy transformed into thermal energy.

Therefore, we have:

K_f = U_i -E_t

where here we have:

U_i=1.58\cdot 10^6 J is the potential energy of the rock at the top of the hill

E_t=1.15\cdot 10^6 J is the energy converted into thermal energy

Substituting, we find

K_f=1.58\cdot 10^6-1.15\cdot 10^6=0.43\cdot 10^6 J

So, this is the kinetic energy of the rock at the bottom of the hill.

d)

The kinetic energy of the rock at the bottom of the hill can be rewritten as

K_f=\frac{1}{2}mv^2

where

m is the mass of the rock

v is its final speed

In this problem, we have:

K_f=0.43\cdot 10^6 J is the final kinetic energy of the hill

m = 670 kg is the mass of the rock

Therefore, the final speed of the rock is:

v=\sqrt{\frac{2K_f}{m}}=\sqrt{\frac{2(0.43\cdot 10^6)}{670}}=35.8 m/s

7 0
3 years ago
At what point on the position-time graph shown is the object's instantaneous velocity greatest?
ioda

I'm probably going to have to say C. E as it seems the steepest right around there. If I'm wrong on that, it has to be B. B

7 0
3 years ago
Read 2 more answers
PLEASE HELP!!!!!!!! More science questions coming soon!!
Naily [24]

Answer:

1.) A - 1,2,1,2

2.) Both forces can act without objects touching.

3.) C

Both can be modeled as waves having amplitude, frequency and wave lengths.

4.) A, B and C

Explanation:

1.) SO2 + ___ H2 ----------> _____ S + _______H2O

Looking at above equation, we have one molecule of surfur at the right hand side (RHS), and one molecule of surfur at the left hand side (LHS).

Two atoms of hydrogen and both RHS and LHS

But oxygen is not balanced. We have two atoms of oxygen at the RHS while having one at the LHS.

So let's make oxygen 2 atoms at LHS by adding 2 to water molecules and hydrogen molecules at the RHS.

SO2 + ___ 2H2 ----------> _____ S + _______2H2O

The correct answer is A - 1,2,1,2

2.) Both magnetic force and gravitational force obey inverse square law with distance. They are not directly proportional but inversely proportional to the square distance. B is the correct answer because Both forces can act without objects touching.

3.) Light waves are transverse waves which can travel through a vacuum without a medium while sound waves are longitudinal waves which cannot travel through vacuum without a medium. But both can be modeled as waves having amplitude, frequency and wave lengths.

4.) If an object is slowing down, due to conservation of energy,

The potential energy could be increasing, like a ball thrown into the air.

The kinetic energy could be lost to friction or air resistance.

The ball could be returning to its natural resting state.

7 0
3 years ago
How much work is needed to lift a 3kg create a vertical displacement of 22m
Ulleksa [173]
I think its W= 647.239J
6 0
3 years ago
Other questions:
  • A car starts from rest and accelerates for 5.2 s with an acceleration of 2.8 m/s 2 . How far does it travel? Answer in units of
    5·1 answer
  • A gas is confined in a cylinder with a piston. What happens when work is done on the gas.
    15·2 answers
  • Two 1.0 kg masses are 1.0 m apart (center to center) on a frictionless table. Each has a +10μC of charge. a) What is the magnitu
    15·1 answer
  • boiling water transfers energy to an ice cube. this is an example of temperature heat heat capacity thermal energy
    9·1 answer
  • An ideal gas in a balloon is kept in thermal equilibrium with its constant-temperature surroundings. How much work is done if th
    6·1 answer
  • A train travels from Albuquerque, New Mexico, to Mexico City in 4 hours with an average velocity of 80 km/h to the south. What i
    9·2 answers
  • What is an earthquake​
    8·2 answers
  • What is the relationship between the frequency and the speed of the wave?
    11·1 answer
  • A 3.5 Newton force (directed at a 30 degree angle with the vertical) to
    11·1 answer
  • What element conducts heat and electricity:
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!