A van of mass 1600 kg was moving at a velocity of 16 m/s when it was involved in a

A person is pulling a freight cart with a force of 58 pounds. how much work is done in moving the cart 70 feet if the cart's han

Kobotan [32]

The person is dragging with a force of 58 lbs at an angle of 27 degrees relating to the ground. We want to use cosine function to look for the horizontal force component. And then we can compute for W = (Horizontal Force) x (Distance). We want the horizontal force component since that is the component that is parallel to the direction the cart is moving. 

(cos 27 degrees)(58 lbs) = 51.69 lbs (This is the horizontal force component.)
W = (51.69 lbs) x (70 ft) = 3618.3 ft*lbs

6 0

3 years ago

Radar is used to determine distances to various objects by measuring the round-trip time for an echo from the object. (a) How fa

BartSMP [9]

Answer

given,

Echo time = t = 1000 s

speed = ?

$v = \dfrac{d}{t}$

a) speed of electromagnetic wave

$c = \dfrac{d}{t}$

wave travels Venus two time

$c = \dfrac{2d}{t}$

$d = \dfrac{ct}{2}$

$d = \dfrac{3 \times 10^8\times 1000}{2}$

d = 1.5 x 10¹¹ m

b) now, echo time

$c = \dfrac{2d}{t}$

$t = \dfrac{2d}{c}$

$t = \dfrac{2\times 75}{3 \times 10^8}$

t = 5 x 10⁻⁷ s

8 0

3 years ago

Which sediment size would allow water to flow through at the fastest rate?

xeze [42]

The sediment size that would allow water to flow through at the fastest rate are pebbles. Sediment is a naturally occurring material that is broken down by processes of weathering and erosion, and is consequently transported by the action of wind, or ice, and or by the force of gravity acting on the particles. Pebble is a clast of rock with a particle size of 2 to 64 millimeters based on the scale of sedimentology.

4 0

3 years ago

How did dalton improve the atomic theory more than 2000 years after democritus's hypothesis about atoms?

suter [353]

Dalton improved the atomic theory by establishing that elements are made of atoms & that all atoms of an element are identical.

6 0

3 years ago

The Eco-Marathon is an annual competition sponsored by Shell Oil, in which participants build special vehicles to achieve the

OverLord2011 [107]

Answer:

(1) V=0.03348 gallons

(2) L= 576.813 km .

Explanation:

Write the relation between the density and volume for ethanol.

density ( ρ )= m/V

Volume ( V )= m/ρ .......... (1)

Here, V is the volume of ethanol, m is the mass of ethanol, and is the density of ethanol.

Write the relation between the specific gravity of ethanol and density of water

ρ=γ*ρ(water) ............. (2)

Here, is specific gravity of ethanol and is the density of water.

Determine the volume of ethanol by substituting equation (2) in equation (1)

V=m/γ*ρ(water)

Substitute 100 gm , for m, for , and 1000 kg/m for.

V= $\frac{100*10^{-3} }{0.789*1000}$

V=0.000112674 $m^{3$

Convert m³ to gallons

V= (0.000112674*264.172 )

V=0.03348 gallons

Step 2:

Determine the distance travelled by the special vehicle named “Micro joule” runs with ethanol.

L=C*V .......... (3)

Here, is the rate of consumption of ethanol by Micro joule.

Substitute 10,705 mi/gallons for C and 0.03348 gallons for .

By using eq. 3.

L= 10750*0.03348

L=358.416 mi.

Convert the distance travelled by Micro joule from miles to kilometres

L= (358.416* 1.60934)

L = 576.813 km

Thus, the distance travelled by Micro joule is 576.813 km .

4 0

3 years ago