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
Sauron [17]
4 years ago
14

A worker pushes horizontally on a large crate with a force of 200 N, and the crate is moved 3.5 m. How much work was done in Jou

les?
Physics
1 answer:
sattari [20]4 years ago
6 0

Work = (force) x (distance) =

           (200 N) x (3.5 m)  =  <em>700 joules</em>


You might be interested in
5. A wave with peaks separated by .34 m has a wavelength of ________________m.
Eduardwww [97]

Answer: 0.17 I think

Explanation:

I asked a doctor

8 0
3 years ago
What is the difference velocity and force?
Vikki [24]
Velocity means speed, while force means the strength or energy when doing something
6 0
2 years ago
Read 2 more answers
By using fossils and matching layers rock layers can be correlated to eachother.
bija089 [108]
I think that the answer to that is true hope that helps
4 0
3 years ago
Read 2 more answers
A rock is thrown off a 50.0 m high cliff. How fast must the rock leave the cliff top to land on level ground below, 90 m from th
blagie [28]

Answer:

The rock must leave the cliff at a velocity of 28.2 m/s

Explanation:

The position vector of the rock at a time t can be calculated using the following equation:

r = (x0 + v0x · t, y0 + 1/2 · g · t²)

Where:

r = position vector at time t.

x0 = initial horizontal position.

v0x = initial horizontal velocity.

t = time.

g = acceleration due to gravity (-9.81 m/s² considering the upward direction as positive).

Please, see the attached figure for a graphical description of the problem. Notice that the origin of the frame of reference is located at the edge of the cliff so that x0 and y0 = 0.

When the rock reaches the ground, the position vector will be (see r1 in the figure):

r1 = (90 m, -50 m)

Then, using the equation of the vector position written above:

90 m = x0 + v0x · t

-50 m = y0 + 1/2 · g · t²

Since x0 and y0 = 0:

90 m = v0x · t

-50 m = 1/2 · g · t²

Let´s use the equation of the y-component of the vector r1 to find the time it takes the rock to reach the ground and with that time we can calculate v0x:

-50 m = 1/2 · g · t²

-50 m = -1/2 · 9.81 m/s² · t²

-50 m / -1/2 · 9.81 m/s² = t²

t = 3.19 s

Now, using the equation of the x-component of r1:

90 m = v0x · t

90 m = v0x · 3.19 s

v0x = 90 m / 3.19 s

v0x = 28.2 m/s

8 0
3 years ago
Plain electromagnetic wave (in air) has a frequency of 1 MHz and its B-field amplitude is 9 nT a. What is the wavelength in air?
Norma-Jean [14]

Answer:

Part a)

\lambda = 300 m

Part b)

E = 2.7 N/C

Part c)

I = 9.68 \times 10^{-3} W/m^2

P = 3.22 \times 10^{-11} N/m^2

Explanation:

Part a)

As we know that frequency = 1 MHz

speed of electromagnetic wave is same as speed of light

So the wavelength is given as

\lambda = \frac{c}{f}

\lambda = \frac{3\times 10^8}{1\times 10^6}

\lambda = 300 m

Part b)

As we know the relation between electric field and magnetic field

E = Bc

E = (9 \times 10^{-9})(3\times 10^8)

E = 2.7 N/C

Part c)

Intensity of wave is given as

I = \frac{1}{2}\epsilon_0E^2c

I = \frac{1}{2}(8.85 \times 10^{-12})(2.7)^2(3\times 10^8)

I = 9.68 \times 10^{-3} W/m^2

Pressure is defined as ratio of intensity and speed

P = \frac{I}{c} = \frac{9.68\times 10^{-3}}{3\times 10^8}

P = 3.22 \times 10^{-11} N/m^2

6 0
3 years ago
Other questions:
  • Rock breaking apart due to constant freezing and thawing is a mechanical process.<br> true or false
    7·1 answer
  • After fixing a flat tire on a bicycle you give the wheel a spin. Its initial angular speed was 5.45 rad/s and it rotated 14.4 re
    11·1 answer
  • my question is about a cupcake recipe and there asking me about a 7-digit code with no spaces and to me that question was pretty
    8·1 answer
  • You are driving home from school steadily at for 180 km. It then begins to rain and you slow to You arrive home after driving 4.
    13·1 answer
  • What potential difference is required to cause 4.00 a to flow through a resistance of 330 ω?
    14·1 answer
  • 5 uses of satellite​
    15·1 answer
  • What invisible force will cause you to fall to the earth if you fall off your bed?
    8·1 answer
  • Which of the following characteristics of stars is affected by a stars temperature?
    11·1 answer
  • Using the diagrams below, choose the Free Body Diagram that represents the following scenario.
    14·1 answer
  • A small, single engine airplane is about to take off. The airplane becomes airborne, when its speed reaches 193.0 km/h. The cond
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!