A dog runs with an initial speed if 7.5m/s on a waxed floor. it slides to a stop in 15 seconds. What is the acceleration

A bullet of mass 6.00 gg is fired horizontally into a wooden block of mass 1.20 kgkg resting on a horizontal surface. The coeffi

icang [17]

Answer:

A 5.00-g bullet is fired horizontally into a 1.20-kg wooden block resting on a horizontal surface. The coefficient of kinetic friction between block and surface is 0.20. The bullet remains embedded in the block, which is observed to slide 0.230 m along the surface before stopping.

Explanation:

3 0

3 years ago

A large truck with a mass of 3200 kg is pulling a trailer with a mass of 2400 kg. Both are accelerating at a rate of 0.45 . Dete

Gwar [14]

Given:

Mass of truck, m1 = 3200 kg

Mass of trailer, m2 = 2400 kg

acceleration = 0.45 m/s²

Let's determine the following:

(a) The tension force between the truck and the trailer.

To find the tension between the truck and the trailer, apply the formula:

$F_{\text{net}}=a(m_1+m_2)$

Where:

Fnet is the tension between the truck and the trailer

a is the acceleration = 0.45 m/s²

m1 is the mass if the truck = 3200 kg

m2 is the mass of trailer = 2400 kg

Hence, we have:

$\begin{gathered} F_{net}=0.45(3200+2400) \\ \\ F_{\text{net}}=0.45(5600) \\ \\ F_{\text{net}}=2520\text{ N} \end{gathered}$

Therefore, the tension between the truck and the trailer is 2520N

(b) The force with which the truck is pulling.

The tension between the truck and the trailer is equivalent to the force on the trailer.

thus, we have:

$\begin{gathered} T=m_2a \\ \\ T=2400\times0.45 \\ \\ T=1080\text{ N} \end{gathered}$

Therefore, the force with which the truck is pulling is 1080N.

ANSWER:

(a) 2520N

(b) 1080 N

8 0

2 years ago

3. What is the temperature if a 545-Hz sound wave has a wavelength of 0.651 m

KATRIN_1 [288]

Answer:

19.33°C

Explanation:

To find the value of T you use the following formula:

$v=343+0.61T$

v: speed of sound

To calculate v you use:

$v=\lambda f$

λ: wavelength = 0.651m

f: = 545Hz

by replacing :

$v=(0.651m)(545s^{-1})=354.79m/s$

Finally, by replacing in the first formula you obtain:

$354.79=343+0.61T\\\\T=19.33\°C$

T = 19.33°C

7 0

3 years ago

This is a computer program, why is there an error between the computer values and the nominal values of R?

ss7ja [257]

Answer:

the difference is due to resistance tolerance

Explanation:

In mathematical calculations, either done by hand or in a computer program, the heat taken from the resistors is the nominal value, which is the writing in its color code, so all calculations give a result, but the Resistors have a tolerance, indicated by the last band that is generally 5%, 10%, 20% and in the expensive precision resistance can reach 1%.

This tolerance or fluctuation in the resistance value is what gives rise to the difference between the computation values and the values measured with the instruments, multimeters.

Another source of error also occurs due to temperature changes in the circuit that affect the nominal resistance value, there is a very high resistance group that indicates the variation with the temperature, they are only used in critical circuits, due to their high cost

In summary, the difference is due to resistance tolerance.

5 0

4 years ago

a worker in a factory has discovered a material that is very confusing.it can be stored in a container but it can also flow from

tamaranim1 [39]

Answer:

liquid?

Explanation:

liquid: A substance that flows and keeps no definite shape because its molecules are loosely packed and constantly moving. It takes the shape of its container but maintains constant volume.

7 0

2 years ago

A dog runs with an initial speed if 7.5m/s on a waxed floor. it slides to a stop in 15 seconds. What is the acceleration ​

A dog runs with an initial speed if 7.5m/s on a waxed floor. it slides to a stop in 15 seconds. What is the acceleration